CN115145503A - Method for processing print image on cloud server and cloud server - Google Patents

Abstract

The invention discloses a method for processing a printed image on a cloud server and the cloud server, and the method comprises the steps of receiving an image to be printed; acquiring equipment information and address information of a target ink-jet printer which outputs the image to be printed; carrying out color management on the image to be printed according to the equipment information of the target ink-jet printer to obtain a printing data file; and sending the printing data file to the target ink-jet printer according to the address information of the target ink-jet printer. According to the invention, the cloud server is adopted to integrate a plurality of remote ink-jet printers, so that resource sharing is realized, and one server can meet various requirements of ink-jet printing, so that resources and cost are saved.

Description

Method and cloud server for printing image processing on cloud server

technical field

The present invention relates to the technical field of inkjet printing image processing, in particular to a method for performing printing image processing on a cloud server and a cloud server.

Background technique

Inkjet printing technology refers to the technology of ejecting ink droplets onto the printing medium through the nozzles on the nozzle to obtain a printed image. Before obtaining the image, it is necessary to perform color management and rasterization on the original image to obtain print data that can be recognized by the inkjet printer. file before it can be sent to an inkjet printer for printing, a "print data file" refers to a data file in a format that can be interpreted by an inkjet printer, and is a file that includes various command data and pixel data, where the command data Refers to the data used to instruct the inkjet printer to perform a specific operation, and pixel data refers to the data associated with the pixels that make up the image to be printed (dot color and size data, etc.); the color management is to enable the inkjet printer to The color of the output printed image is the same as the original image. Therefore, when performing color management on the original image, it is necessary to obtain the relevant device characteristic file of the inkjet printer, and then process the color of the original image according to the device characteristic file, and then go through rasterization processing. The resulting print data file satisfies the requirements for color consistency.

In the Internet era, there are more and more demands for personalized design, and the requirements for automation are also getting higher and higher. The integration and sharing of resources has become the trend of existing social development. The existing PC or inkjet printer connected to the inkjet printer The previous image processing methods of color management and rasterization of original images have been unable to meet the needs of society. Therefore, it is a problem to be solved to develop a method that can process original images in large quantities, quickly and remotely.

SUMMARY OF THE INVENTION

The embodiments of the present invention provide a method and a cloud server for performing print image processing on a cloud server, so as to solve the problem that the existing image processing method cannot meet social demands.

In a first aspect, an embodiment of the present invention provides a method for performing print image processing on a cloud server, the method comprising:

receive images to be printed;

Obtain device information and address information of the target inkjet printer that outputs the to-be-printed image;

Performing color management on the to-be-printed image according to the device information of the target inkjet printer to obtain a print data file;

The print data file is sent to the target inkjet printer according to the address information of the target inkjet printer.

Preferably, the printing data file obtained by performing color management on the to-be-printed image according to the device information of the target inkjet printer includes:

calling the corresponding ICC characteristic file and color correction file according to the device information of the target inkjet printer;

Converting the to-be-printed image into first image data in the color space of the target inkjet printer according to the ICC profile;

Performing correction processing on the first image data according to the color correction file to obtain second image data, so that the print image output by the target inkjet printer is consistent with the color of the to-be-printed image;

Halftone processing is performed on the second image data in combination with the printing requirements to obtain a print data file recognizable by the target inkjet printer.

Preferably, the halftone processing includes one of a dither processing method, an error diffusion processing method, and an optimal iterative processing method.

Preferably, after the printing data file is sent to the target inkjet printer according to the address information of the target inkjet printer, the method further includes:

Controlling the target inkjet printer to perform inkjet printing according to the print data file to obtain a print image;

scanning the print image to obtain scan data;

The color correction file is adjusted and updated based on the scan data.

Preferably, the correction processing includes one or more of: dark and light color ratio processing, color dilution processing, ink volume processing, linearization correction processing, gray balance processing, and black decomposition processing.

Preferably, the acquiring device information and address information of the target inkjet printer that outputs the to-be-printed image includes:

obtaining size information and color gamut information of the to-be-printed image;

determining the serial number of the target inkjet printer that can output the to-be-printed image according to the size information and the color gamut information;

The device information and address information of the target inkjet printer are extracted according to the serial number of the target inkjet printer.

Preferably, the determining the number of the target inkjet printer that can output the to-be-printed image according to the size information and the color gamut information includes:

Determine the serial numbers of all inkjet printers to be printed that can output the to-be-printed image according to the size information;

Extract the corresponding ICC characteristic files according to the serial numbers of all the inkjet printers to be used;

Determine the color gamut range of each of the to-be-ink-jet printers according to the ICC profile of the to-be-ink-jet printer;

The color gamut range of each of the to-be-inkjet printers is compared with the target printing range in the color gamut information to obtain the serial number of the target inkjet printer that satisfies the target printing range.

In a second aspect, an embodiment of the present invention further provides a cloud server, where the cloud server includes:

a receiving module for receiving the image to be printed;

The storage module is used to store the device information and address information of the target inkjet printer;

a color management module, configured to perform color management on the to-be-printed image according to the device information of the target inkjet printer that outputs the to-be-printed image to obtain a print data file;

A sending module, configured to send the print data file to the target inkjet printer according to the address information.

Preferably, the cloud server further includes:

The calling module is configured to call the corresponding ICC characteristic file and color correction file from the storage module according to the device information.

Preferably, the color management module includes:

a color conversion unit, configured to convert the to-be-printed image into first image data in the color space of the target inkjet printer according to the ICC profile;

a color correction unit, configured to perform correction processing on the first image data according to the color correction file to obtain second image data, so that the print image output by the target inkjet printer is consistent with the color of the to-be-printed image;

A halftone processing unit, configured to perform halftone processing on the second image data in combination with printing requirements to obtain a print data file that can be recognized by the target inkjet printer.

Preferably, the color correction unit includes:

Dark and light color matching subunit: used to perform dark and light transition processing on the first image data;

The dilution processing subunit is configured to perform pixel point processing on the first image data to change the color as a whole.

an ink volume control subunit, used for processing the ink output volume corresponding to the first image data;

a linearization correction subunit, configured to process the ink output corresponding to the first image data according to the characteristics of the printing medium and ink;

a gray balance processing subunit, configured to process the first image data to make the color transition smooth and natural;

The black decomposition subunit is used for decomposing a corresponding color channel in the first image data into multiple color channel data.

To sum up, the method and cloud server for printing image processing on a cloud server provided by the embodiments of the present invention directly install the color management module on the cloud server, so that the received pending image can be directly processed on the cloud server. The printed image is color managed according to the device information of the target inkjet printer, realizing a remote and flexible image processing method, and after the printing image processing is completed, the print data file is sent according to the address information of the target inkjet printer for inkjet printing, ensuring that Accurate printing; the present invention uses a cloud server to integrate multiple remote inkjet printers, thereby realizing resource sharing, and one server can meet various requirements for inkjet printing, saving resources and costs.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the accompanying drawings required in the embodiments of the present invention will be briefly introduced below. For those of ordinary skill in the art, without creative work, the Additional drawings can be obtained from these drawings.

FIG. 1 is a schematic structural diagram of a printing image processing system according to a first embodiment of the present invention.

FIG. 2 is a schematic structural diagram of a printing image processing system according to a second embodiment of the present invention.

FIG. 3 is a schematic structural diagram of a printing image processing system according to a third embodiment of the present invention.

FIG. 4 is a schematic structural diagram of a printing image processing system according to a fourth embodiment of the present invention.

FIG. 5 is a schematic structural diagram of a cloud server according to a fifth embodiment of the present invention.

FIG. 6 is a schematic structural diagram of a color management module according to a sixth embodiment of the present invention.

FIG. 7 is a schematic structural diagram of a color correction unit according to a sixth embodiment of the present invention.

Figure 8 is a schematic diagram of a product that has not undergone color correction processing.

FIG. 9 is a method for performing print image processing on a cloud server according to a seventh embodiment of the present invention.

FIG. 10 is a method for performing print image processing on a cloud server according to an eighth embodiment of the present invention.

FIG. 11 is a method for performing print image processing on a cloud server according to the ninth embodiment of the present invention.

FIG. 12 is a method for updating an image correction file according to a tenth embodiment of the present invention.

Detailed ways

The features and exemplary embodiments of various aspects of the present invention will be described in detail below. In order to make the objects, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only configured to explain the present invention, and are not configured to limit the present invention. It will be apparent to those skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is only intended to provide a better understanding of the present invention by illustrating examples of the invention.

It should be noted that, in this document, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any relationship between these entities or operations. any such actual relationship or sequence exists. Moreover, the terms "comprising", "comprising" or any other variation thereof are intended to encompass a non-exclusive inclusion such that a process, method, article or device that includes a list of elements includes not only those elements, but also includes not explicitly listed or other elements inherent to such a process, method, article or apparatus. Without further limitation, an element defined by the phrase "comprises" does not preclude the presence of additional identical elements in a process, method, article, or device that includes the element.

Referring to FIG. 1, an embodiment of the present invention provides a printing image processing system, which is characterized by comprising: a cloud server 100, a printing controller 200, an inkjet printer 300, and a client 400; the cloud server 100 is used for Perform color management on the received image to be printed to obtain a print data file that can be identified by the print controller 200. The print controller 200 is configured to control the inkjet printer 300 to print according to the received print data file. Ink printing; the client is used to upload the image to be printed to the cloud server 100, wherein the cloud server 100 communicates with the client and the print controller 200 through a wireless network, and the The print controller 200 communicates with the inkjet printer 300 through a wireless network or a wired network. Specifically, in this embodiment, the process of using the above-mentioned printing image processing system to process images to be printed is as follows: a client logs in to the cloud server 100 by entering an account and a password through the client, and transmits the images to be printed in the client. The cloud server 100, after the cloud server 100 receives the to-be-printed image, analyzes the to-be-printed image to determine the target inkjet printer 300 that can be used, and then extracts the target inkjet printer from the storage module. 300 device information and address information, perform color management on the to-be-printed image according to the ICC profile in the device information to obtain a print data file, and then transmit the print data file to the inkjet printer 300 through a wireless network according to the address information The associated print controller 200, after receiving the print data file, the print controller 200 controls the target inkjet printer 300 to perform inkjet printing according to the print data according to the command data in the print data file, and then obtains the product required by the customer .

The print controller 200 may include a central processing unit (CPU), or a specific integrated circuit (Application Specific Integrated Circuit, ASIC), or may be configured to implement one or more integrated circuits in the embodiments of the present invention.

Please refer to FIG. 2 , in this embodiment, the client is installed in a mobile communication terminal, the print controller 200 is installed in the inkjet printer 300 , and the mobile communication terminal includes: a mobile phone, a tablet computer, a notebook computer , handheld computer, personal digital assistant (Personal Digital Assistant, PDA), portable media player (Portable Media Player, PMP), navigation devices, wearable devices, smart bracelets, pedometers and other mobile communication terminals. This embodiment realizes the upload processing of the image to be printed at any time and any place, which makes the image processing more flexible.

Referring to FIG. 3, in this embodiment, the client is installed in the inkjet printer 300, and the print controller 200 is also installed in the inkjet printer 300. When the inkjet printer 300 receives an image to be printed, The to-be-printed image is uploaded to the cloud server 100. This embodiment realizes that multiple printing devices use one color management software instead of one inkjet printer 300 to install one color management software, which saves costs.

Referring to FIG. 4, in this embodiment, the client is installed in a mobile communication terminal, the print controller 200 is installed in a PC connected to the inkjet printer 300, and an external PC is used to control the inkjet The printing of the printer 300 improves the stable performance of the machine.

Referring to FIG. 5, an embodiment of the present invention further provides a cloud server 100, where the cloud server 100 includes:

a receiving module 110, configured to receive an image to be printed;

The storage module 120 is used to store the device information and address information of the target inkjet printer;

a color management module 130, configured to perform color management on the to-be-printed image according to the device information of the target inkjet printer that outputs the to-be-printed image to obtain a print data file;

The sending module 140 is configured to send the print data file to the target inkjet printer according to the address information.

Specifically, the receiving module 110 receives the to-be-printed image sent by the client, parses the to-be-printed image after receiving to obtain its print size and color gamut information, and then determines the print size from the storage module 120 according to the print size The numbers of all the inkjet printers to be printed can be output, the ICC profile of each device to be printed can be extracted according to the numbers, the color gamut range of each device to be printed can be determined according to the ICC profile, and the range of each device to be printed can be compared. The color gamut range of the inkjet printer and the target color gamut range determined in the color gamut information of the image to be printed are determined, and the target inkjet printers that satisfy the target color gamut range of the to-be-printed image in all the inkjet printers to be printed are determined The number of the printer, the address information of the target inkjet printer is obtained according to the number of the target inkjet printer; after the relevant information of the target inkjet printer is determined, the color management module 130 is based on the device information of the target inkjet printer. The image is color managed to obtain a print data file that the target inkjet printer can recognize. "Print data file" refers to a data file with a format that can be interpreted by the inkjet printer, and is a file that includes various command data and pixel data, wherein , command data refers to the data used to instruct the inkjet printer to perform a specific operation, pixel data refers to the data associated with the pixels that make up the image to be printed (dot color and size data, etc.); after the color management processing is completed, the sending module The print data file is sent to the target inkjet printer through the network according to the address information of the target inkjet printer, and the target inkjet printer performs inkjet printing according to the current task situation.

The color gamut range of the target inkjet printer is obtained by scanning the first color target image printed by the target inkjet printer, obtaining the first measured Lab value of each color block in the first color target image, and using the Describe the first measurement Lab value, namely luminance value L, red-green color value a and blue-yellow color value b, calculate and obtain the hue angle H*, luminance coordinate L* and chromaticity coordinate C* of each color block, and then determine each color block. The positions of the color blocks in the two-dimensional plane are obtained, and the peripheral contours of all color blocks in the two-dimensional plane are obtained to determine the first printing color gamut range. Wherein, the calculation formulas of the hue angle H*, the luminance coordinate L* and the chromaticity coordinate C* are as follows:

The storage module 120 may include mass storage for data or instructions. By way of example and not limitation, the storage module 120 may include a Hard Disk Drive (HDD), a floppy disk drive, a flash memory, an optical disk, a magneto-optical disk, a magnetic tape or a Universal Serial Bus (USB) drive or two or More combinations of these. Storage module 120 may include removable or non-removable (or fixed) media, as appropriate. In certain embodiments, the storage module 120 is a non-volatile solid state memory. In certain embodiments, the storage module 120 includes a read only memory (ROM). Where appropriate, the ROM may be a mask programmed ROM, programmable ROM (PROM), erasable PROM (EPROM), electrically erasable PROM (EEPROM), electrically rewritable ROM (EAROM) or flash memory or A combination of two or more of the above.

The color management module 130 reads and executes the computer program instructions stored in the storage module 120 to implement any one of the methods for performing print image processing on a cloud server in the following embodiments.

Preferably, the cloud server 100 further includes:

The calling module 150 is configured to call the corresponding ICC characteristic file and the color correction file from the storage module according to the device information. In order to use the ICC characteristic file and the color correction file to perform color conversion and correction processing on the image to be printed.

Preferably, referring to FIG. 6 , the color management module 130 further includes:

The color conversion unit 131 is configured to convert the to-be-printed image into first image data in the color space of the target inkjet printer according to the ICC profile; for example, in this embodiment, the to-be-printed image is Multi-gray RGB data represented by red (R), green (G), and blue (B) color spaces, so it is necessary to convert multi-gray RGB data into cyan (C), magenta (M) through ICC profile , CMYK data represented by yellow (Y), black (K) color space, the specific process is to first convert the multi-gray RGB data into Lab data in the device-independent Lab color space, where L represents brightness, and a represents from red The range from green to green, b represents the range from blue to yellow, and then converted from Lab color space to CMYK data commonly used in the digital printing industry through the specific ICC file of the target inkjet printing device, so that the color will not be lost, very Good preserves the original colors of the image to be printed.

A color correction unit 132, configured to perform correction processing on the first image data according to the color correction file to obtain second image data, so that the print image output by the target inkjet printer is consistent with the color of the to-be-printed image;

The halftone processing unit 133 is configured to perform halftone processing on the second image data in combination with printing requirements to obtain a print data file recognizable by the target inkjet printer; Convert the number of data into data of the number of grayscales that can be recognized by an inkjet printer, for example, halftone processing is to convert data representing 256 grayscales into 1bit data representing 2 grayscales or 2bit representing 4 grayscales processing of data. In this embodiment, the 1-bit data of 2 gray levels is represented by "0" or "1", wherein "0" represents no ink, and "1" represents ink output; 2-bit data of 4 gray levels is represented by "0", "1", "2", and "3" indicate, among them, "0" indicates no ink, "1" indicates a small dot of ink, "2" indicates a medium dot of ink, and "3" indicates a large dot of ink.

Specifically, please refer to FIG. 7, the color correction unit includes:

Dark and light color matching subunit 1321: used to perform transition processing on the color of the first image data;

Specifically, in the actual print output, for the same image to be printed, the quality of products obtained by printing with inks of different densities is also different. As shown in Figure 8, when printing with light ink a, the dot distribution on the output image is more dense, and when printing with dark ink b, the dot distribution on the output image is relatively sparse, and when the same image is printed with dark ink At this time, the light-colored part of the image printed by the dark ink is very coarse, so that the image layer is not clear, the color tone is rough, and the product quality is poor. Therefore, in order to make the printed product layer more distinct and the tone more delicate and soft, one color ink is generally divided into multiple color inks for mixing and matching. The dark and light color ratio subunit obtains the mixing ratio data of each ink by using the ratio curve of each ink used by the target inkjet printer, so that the output product has a uniform color gradient and a delicate image.

The dilution processing subunit 1322 is configured to perform pixel point processing on the first image data to change the color as a whole. Specifically, when the overall color is found to be lighter or darker, the overall color of the first image data is diluted or deepened to change the overall color. When the picture needs to be enlarged or reduced, the overall color may be lighter or darker. problem, and dilution treatment is also required at this time.

The ink volume control sub-unit 1323 is used to process the ink volume corresponding to the first image data; specifically, according to the actual ink volume printed by each color, the percentage of the ink volume that needs to be adjusted for the color is adjusted respectively. Including cutting ink or increasing ink volume.

The linearization correction subunit 1324 is used to process the ink output corresponding to the first image data according to the characteristics of the printing medium and ink, that is, according to the performance of the ink on the printing medium, measure the data and automatically adjust the overall transition of the ink; Specifically, in the actual printout, the ink density will change with the increase of the ink amount. Low ink volume produces a low density value, and high ink volume produces a high density value, but starting from a certain ink volume, even if the ink volume continues to increase, the ink density will no longer increase, and continuing to increase the ink volume will also cause a series of printing failures , such as ink piles, uneven ink coverage, etc.; at the same time, due to the longer drying time, it is easy to cause the backside to be dirty, paste and other phenomena, thus affecting the quality of the printed product. The linearization correction subunit calls the linearization correction curve of the target inkjet printer stored in the storage module, and controls the ink output of the to-be-printed image through the linearization correction curve.

The gray balance processing subunit 1325 is configured to process the first image data to make the color transition smooth and natural. Gray balance means that the three color versions of yellow (Y), magenta (M) and cyan (C) present neutral gray on printed products according to the ratio of different dot area ratios. In the RGB color mode, R:G:B=1:1:1, that is, the three colors of red, green and blue are equal in value, that is, neutral gray. In theory, equal amounts of C, M, and Y inks can be mixed to produce neutral gray, but in reality, the ink color effect is limited by industrial production conditions, and the color rendering capabilities of C, M, and Y are not the same. The color rendering power is the strongest, and the color rendering power of C is the weakest. Therefore, the same amount of C, M, and Y ink will not produce neutral gray, but will produce reddish gray. To obtain neutral gray, C ink must be added. This is the basic principle of gray balance. It is the basis for any color separation method to achieve correct color reproduction. If gray balance cannot be achieved during color separation, the gray in the original will no longer be gray after copying, and other colors will inevitably produce color casts. The gray balance processing sub-unit adjusts the image data to obtain image data satisfying the gray balance by acquiring the calibration curve obtained by testing different inks.

The black decomposition subunit 1326 is configured to decompose a corresponding color channel in the first image data into multiple color channel data. At present, the black color of color inkjet printers is printed using a simple K (black) channel, which will cause uneven black printing. C (cyan), M (magenta), Y (yellow), K ( Black) mixed printing black can solve the problem of uneven black. The black decomposition subunit reflects the black printed by the pure black channel by mixing the ink volume of the black channel and the cyan channel, magenta channel, and yellow channel according to a certain ratio. quality of printed products.

Referring to FIG. 9, an embodiment of the present invention further provides a method for performing print image processing on a cloud server, the method comprising:

S1. Receive the image to be printed;

Specifically, the cloud server receives and stores the to-be-printed image uploaded through a mobile communication terminal or an inkjet printer, where the mobile terminal may be a mobile phone, a tablet computer, a notebook computer, a palmtop computer, a Personal Digital Assistant (PDA) , PDA), portable media player (Portable Media Player, PMP), navigation device, wearable device, smart bracelet, pedometer and other mobile communication terminals.

S2, obtaining the device information and address information of the target inkjet printer that outputs the to-be-printed image;

Specifically, please refer to FIG. 10, the step S2 specifically includes:

S21, obtaining size information and color gamut information of the to-be-printed image;

S22, determining the serial number of the target inkjet printer that can output the to-be-printed image according to the size information and the color gamut information;

S23. Extract the device information and address information of the target inkjet printer according to the serial number of the target inkjet printer.

Specifically, after receiving the image to be printed, the cloud server parses the image to be printed to obtain its print size and color gamut information, and then determines from the storage module the serial numbers of all inkjet printers that can output the image to be printed from the storage module according to the print size, Extract the ICC characteristic file of each device to be printed according to the serial number, determine the color gamut range of each device to be printed according to the ICC characteristic file, and compare the color gamut range of each inkjet printer to be printed with the color gamut of the image to be printed The target color gamut range determined in the information, determine the number of the target inkjet printer that satisfies the target color gamut range of the image to be printed in all the inkjet printers to be printed, and obtain the target inkjet printer according to the number of the target inkjet printer address information of the printer; after determining the relevant information of the target inkjet printer, the color management module performs color management on the to-be-printed image according to the device information of the target inkjet printer to obtain a print data file that the target inkjet printer can recognize, " "Print data file" refers to a data file having a format that can be interpreted by an inkjet printer, and is a file that includes various command data and pixel data, wherein command data refers to data used to instruct the inkjet printer to perform a specific operation, Pixel data refers to the data associated with the pixels that make up the image to be printed (dot color and size data, etc.); after the color management process is completed, the sending module sends the print data file through the network according to the address information of the target inkjet printer To the target inkjet printer, the target inkjet printer performs inkjet printing according to the current task situation. The color gamut range of the target inkjet printer is obtained by scanning the first color target image printed by the target inkjet printer, obtaining the first measured Lab value of each color block in the first color target image, and using the Describe the first measurement Lab value, namely luminance value L, red-green color value a and blue-yellow color value b, calculate and obtain the hue angle H*, luminance coordinate L* and chromaticity coordinate C* of each color block, and then determine each color block. The positions of the color blocks in the two-dimensional plane are obtained, and the peripheral contours of all color blocks in the two-dimensional plane are obtained to determine the first printing color gamut range. Wherein, the calculation formulas of the hue angle H*, the luminance coordinate L* and the chromaticity coordinate C* are as follows:

S3, performing color management on the to-be-printed image according to the device information of the target inkjet printer to obtain a print data file;

Specifically, please refer to FIG. 11 , the step S3 specifically includes:

S31, calling the corresponding ICC characteristic file and color correction file according to the device information of the target inkjet printer;

S32, converting the to-be-printed image into first image data in the color space of the target inkjet printer according to the ICC profile;

S33, performing correction processing on the first image data according to the color correction file to obtain second image data, so that the print image output by the target inkjet printer is consistent with the color of the to-be-printed image;

S34. Perform halftone processing on the second image data in combination with the printing requirements to obtain a print data file that can be recognized by the target inkjet printer.

Specifically, as in this embodiment, the to-be-printed image is multi-grayscale RGB data represented in red (R), green (G), and blue (B) color spaces, so it is necessary to use the ICC characteristic file to The grayscale RGB data is converted into CMYK data represented by cyan (C), magenta (M), yellow (Y), and black (K) color spaces. The specific process is to first convert multi-grayscale RGB data into device-independent Lab data in the Lab color space, where L represents the brightness, a represents the range from red to green, and b represents the range from blue to yellow, and then converted from the Lab color space by the specific ICC file of the target inkjet printing device It can be converted into CMYK data commonly used in the digital printing industry, so that the color will not be lost, and the original color of the image to be printed is well preserved. In order to ensure better color reproduction, call the color correction file to sequentially perform one or more of dark and light color matching processing, color dilution processing, ink volume processing, linearization correction processing, gray balance processing, and black decomposition processing on the first image data. A variety of processes are used to obtain image data with better color matching. Then, combined with the printing requirements, the image data obtained by the color correction processing is processed by the error diffusion processing method to obtain the printing data that can be recognized by the target inkjet printer. Wherein, the error diffusion processing method is one of halftone processing methods, and the halftone processing method further includes one of dither processing method and optimal iterative processing method.

The correction processing includes one or more of dark and light color ratio processing, color dilution processing, ink volume processing, linearization correction processing, gray balance processing, and black decomposition processing. Specifically, the dark and light color ratio is obtained by using the ratio curve of each ink used by the target inkjet printer to obtain the mixing ratio data of each ink, so that the output product has a uniform color gradient and a delicate image. The linearization correction is to use the linearization correction curve of the target inkjet printer, and the ink output amount of the to-be-printed image is controlled by the linearization correction curve. The gray balance processing is to obtain the image data satisfying the gray balance by adjusting the image data by acquiring the calibration curve obtained by testing different inks. The dilution process is used to dilute or deepen the overall density of the color, the ink volume control is to adjust the ink volume percentage of each color according to the actual ink volume of each color printing, and the black decomposition is to separate the black channel and cyan channel, The ink volume of the red channel and the yellow channel is mixed according to a certain proportion to reflect the black printed by the pure black channel. The black printed by the mixed ink volume is uniform and the color is bright, which improves the quality of the printed product.

S4. Send the print data file to the target inkjet printer according to the address information of the target inkjet printer.

Specifically, according to the address information of the target inkjet printer, a print data file is transmitted to the print controller associated with the inkjet printer through a wireless network, and after the print controller receives the print data file, the print data file is The command data in the data file controls the target inkjet printer to perform inkjet printing according to the printing data, and then obtains the product required by the customer.

Preferably, referring to FIG. 12, in order to enable the inkjet printing device to print stable colors all the time, after the step S4, the method further includes:

S5, controlling the target inkjet printer to perform inkjet printing according to the print data file to obtain a print image;

S6, scan the print image to obtain scan data;

S7. Adjust and update the color correction file according to the scan data.

With the use of the device, its ink output and color conditions will change. In order to enable the inkjet printing device to print stable colors all the time, it is necessary to update its color correction file in real time and perform cyclic correction processing. In order to avoid repeated printing of color targets The actual color data of the image can be obtained by scanning the image once after printing an image, comparing the actual color data with the color data in the second image data to obtain the deviation, and adjusting the color correction file according to the deviation. Correcting the data, and doing so cyclically, can ensure the stability of the output color of the inkjet printing device.

To sum up, the method and cloud server for printing image processing on a cloud server provided by the embodiments of the present invention directly install the color management module on the cloud server, so that the received pending image can be directly processed on the cloud server. The printed image is color managed according to the device information of the target inkjet printer, realizing a remote and flexible image processing method, and after the printing image processing is completed, the print data file is sent according to the address information of the target inkjet printer for inkjet printing, ensuring that Accurate printing; the present invention uses a cloud server to integrate multiple remote inkjet printers, thereby realizing resource sharing, and one server can meet various requirements for inkjet printing, saving resources and costs.

It is to be understood that the present invention is not limited to the specific arrangements and processes described above and shown in the figures. For the sake of brevity, detailed descriptions of known methods are omitted here. In the above-described embodiments, several specific steps are described and shown as examples. However, the method process of the present invention is not limited to the specific steps described and shown, and those skilled in the art can make various changes, modifications and additions, or change the sequence of steps after comprehending the spirit of the present invention.

The functional blocks shown in the above-described structural block diagrams may be implemented as hardware, software, firmware, or a combination thereof. When implemented in hardware, it may be, for example, an electronic circuit, an application specific integrated circuit (ASIC), suitable firmware, a plug-in, a function card, or the like. When implemented in software, elements of the invention are programs or code segments used to perform the required tasks. The program or code segments may be stored in a machine-readable medium or transmitted over a transmission medium or communication link by a data signal carried in a carrier wave. A "machine-readable medium" may include any medium that can store or transmit information. Examples of machine-readable media include electronic circuits, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, fiber optic media, radio frequency (RF) links, and the like. The code segments may be downloaded via a computer network such as the Internet, an intranet, or the like.

It should also be noted that the exemplary embodiments mentioned in the present invention describe some methods or systems based on a series of steps or devices. However, the present invention is not limited to the order of the above steps, that is, the steps may be performed in the order mentioned in the embodiments, or may be different from the order in the embodiments, or several steps may be performed simultaneously.

The above are only specific implementations of the present invention. Those skilled in the art can clearly understand that, for the convenience and simplicity of the description, the specific working process of the above-described systems, modules and units may refer to the foregoing method embodiments. The corresponding process in , will not be repeated here. It should be understood that the protection scope of the present invention is not limited to this. Any person skilled in the art can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should all cover within the protection scope of the present invention.

Claims (11)

1. A method for performing print image processing on a cloud server, wherein the method comprises: receive images to be printed; Obtain device information and address information of the target inkjet printer that outputs the to-be-printed image; Performing color management on the to-be-printed image according to the device information of the target inkjet printer to obtain a print data file; The print data file is sent to the target inkjet printer according to the address information of the target inkjet printer. 2 . The method for performing print image processing on a cloud server according to claim 1 , wherein the printing data file obtained by performing color management on the to-be-printed image according to the device information of the target inkjet printer comprises the following steps: 2 . : calling the corresponding ICC characteristic file and color correction file according to the device information of the target inkjet printer; Converting the to-be-printed image into first image data in the color space of the target inkjet printer according to the ICC profile; Performing correction processing on the first image data according to the color correction file to obtain second image data, so that the print image output by the target inkjet printer is consistent with the color of the to-be-printed image; Halftone processing is performed on the second image data in combination with the printing requirements to obtain a print data file recognizable by the target inkjet printer. 3 . The method for printing image processing on a cloud server according to claim 2 , wherein the halftone processing comprises one of a dithering processing method, an error diffusion processing method, and an optimal iterative processing method. 4 . 4 . The method for performing print image processing on a cloud server according to claim 2 , wherein after sending the print data file to the target inkjet printer according to the address information of the target inkjet printer. 5 . , the method also includes: Controlling the target inkjet printer to perform inkjet printing according to the print data file to obtain a print image; scanning the print image to obtain scan data; The color correction file is adjusted and updated based on the scan data. 5. The method for printing image processing on a cloud server according to claim 4, wherein the correction processing comprises: dark and light color ratio processing, color dilution processing, ink volume processing, linearization correction processing, grayscale processing One or more of balance treatment and black decomposition treatment. 6. The method for performing print image processing on a cloud server according to claim 1, wherein the acquiring device information and address information of the target inkjet printer that outputs the to-be-printed image comprises: obtaining size information and color gamut information of the to-be-printed image; determining the serial number of the target inkjet printer that can output the to-be-printed image according to the size information and the color gamut information; The device information and address information of the target inkjet printer are extracted according to the serial number of the target inkjet printer. 7 . The method for performing print image processing on a cloud server according to claim 6 , wherein the target inkjet printer that can output the to-be-printed image is determined according to the size information and the color gamut information. 8 . The numbers include: Determine the serial numbers of all inkjet printers to be printed that can output the to-be-printed image according to the size information; Extract the corresponding ICC characteristic files according to the serial numbers of all the inkjet printers to be used; Determine the color gamut range of each of the to-be-ink-jet printers according to the ICC profile of the to-be-ink-jet printer; The color gamut range of each of the to-be-inkjet printers is compared with the target printing range in the color gamut information to obtain the serial number of the target inkjet printer that satisfies the target printing range. 8. A cloud server, characterized in that the cloud server comprises: a receiving module for receiving the image to be printed; The storage module is used to store the device information and address information of the target inkjet printer; a color management module, configured to perform color management on the to-be-printed image according to the device information of the target inkjet printer that outputs the to-be-printed image to obtain a print data file; A sending module, configured to send the print data file to the target inkjet printer according to the address information. 9. The cloud server according to claim 5, wherein the cloud server further comprises: The calling module is configured to call the corresponding ICC characteristic file and color correction file from the storage module according to the device information. 10. The cloud server according to claim 6, wherein the color management module comprises: a color conversion unit, configured to convert the to-be-printed image into first image data in the color space of the target inkjet printer according to the ICC profile; a color correction unit, configured to perform correction processing on the first image data according to the color correction file to obtain second image data, so that the print image output by the target inkjet printer is consistent with the color of the to-be-printed image; A halftone processing unit, configured to perform halftone processing on the second image data in combination with printing requirements to obtain a print data file that can be recognized by the target inkjet printer. 11. The cloud server according to claim 7, wherein the color correction unit comprises: Dark and light color matching subunit: used to perform dark and light transition processing on the first image data; a dilution processing subunit, configured to perform pixel point processing on the first image data to make the overall color change; an ink volume control subunit, used for processing the ink output volume corresponding to the first image data; a linearization correction subunit, configured to process the ink output corresponding to the first image data according to the characteristics of the printing medium and ink; a gray balance processing subunit, configured to process the first image data to make the color transition smooth and natural; The black decomposition subunit is used for decomposing a corresponding color channel in the first image data into multiple color channel data.

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