CN104553313B - Printing image data processing method and device - Google Patents

Abstract

The invention provides a printing image data processing method and device. The method includes: dividing the print image data into at least two main columns according to the number of nozzles, and the print image data is a matrix of M rows and N columns consisting of M*N network dots formed by color separation and hanging on the screen. ; Process the dots in each row of the matrix so that the X dots at the end of the K main column in each row of dots overlap with the X dots at the head of the K+1 main column of the row, and X and K are positive integers; In each row of the matrix, set the print split point in the X overlapping screen dots of the K main column and the K+1 main column, remove the print split point in the K main column to the last dot at the end, and remove the K+1 main column Remove from the first dot at the beginning of the column to the printing division point, so that the printer control system controls the nozzle to print the dot corresponding to the main column. The method can realize the reasonable separation of the printing image data formed after color separation and hanging on the net, so as to improve the quality of the printed pattern.

Description

Print image data processing method and device

technical field

The invention relates to data processing technology, in particular to a printing image data processing method and device.

Background technique

Digital inkjet technology is to generate image data that can be printed by a digital inkjet printing machine through the computer through the computer to separate the original data, and then transmit it to the numerical control system of the printer. The digital nozzle is controlled by the numerical control system to directly inkjet imaging.

Ceramic inkjet printer is a digital inkjet printing equipment that uses digital inkjet technology to print patterns on different materials such as ceramics. Substrates such as ceramic plates move longitudinally on a long conveyor belt. The predetermined position of the nozzle of the ink printer, the nozzle is under the control of the control system, the piezoelectric crystal in the nozzle generates pulses to squeeze out the ink, and directly sprays mist ink droplets to the surface of the ceramic for imaging. Because the horizontal width (perpendicular to the moving direction of the conveyor belt in the horizontal plane) of substrates such as ceramic plates is relatively large, and the horizontal width that can be covered by one nozzle is very limited, therefore, multiple nozzles are required; as shown in Figure 1, In order to save installation space, multiple nozzles 1 are staggered along the horizontal direction F2, that is, adjacent nozzles 1 are also separated by a certain distance in the longitudinal direction, and multiple nozzles 1 spray ink at the same time to realize printing patterns on the entire width.

However, when the ceramic sheet moves along the longitudinal direction F1 with the conveyor belt 12, due to the movement characteristics of the transmission belt body, there will be a slight vibration in the horizontal direction F2, which will cause the conveyor belt 12 to show a "serpentine movement" as a whole, resulting in a relatively The joints formed by the two adjacent nozzles 1 (the two nozzles 1 arranged in front and behind in the longitudinal direction) have part of the area where ink droplets are not ejected or ink droplets are repeatedly ejected, that is, white ink is formed on the printed pattern. Lines or black lines affect the print quality.

Contents of the invention

In view of the above-mentioned defects in the prior art, the present invention provides a printing image data processing method and device, which are used to reasonably separate the printing image data formed after color separation and screen hanging, so as to improve the quality of printed patterns.

The invention provides a printing image data processing method, comprising:

According to the number of nozzles, the print image data is divided into at least two main columns. The print image data is a matrix of M rows and N columns composed of M*N network dots formed after the picture is separated and hung on the net. M, N It is a positive integer, M≥1, N≥4;

The dots in each row of the matrix are processed so that the X dots at the end of the Kth main column in each row of dots overlap with the X dots at the head of the K+1 main column in the row, and X and K are positive integers, 1 ≤X, 1≤K≤N-1;

Set the printing division point in the X overlapping dots of the Kth main column and the K+1th main column in each row of the matrix, and remove the printing division point in the Kth main column to the last dot at the end , and remove the 1st dot at the head end in the K+1th main column to the printing division point, so that the printer control system controls the nozzle to print the dots of the corresponding main column.

The present invention provides a print image data processing device, comprising:

The division module is used to divide the print image data into at least two main columns according to the number of nozzles, and the print image data is formed after the picture is subjected to color separation and hanging on the net, and M*N dots are composed of M rows and N columns. Matrix, M and N are positive integers, M≥1, N≥4;

The dot processing module is used to process the dots in each row of the matrix, so that the X dots at the end of the K main column in each row of dots overlap with the X dots at the head of the K+1 main column of the row, X, K is a positive integer, 1≤X, 1≤K≤N-1;

The setting module is used to set the printing dividing point in the X overlapping dots of the Kth main column and the K+1 main column in each row of the matrix, and set the printing dividing point in the Kth main column to the end Remove the last dot at the end, and remove the first dot at the first end in the K+1th main column to the printing division point, so that the printer control system controls the nozzle to print the dots of the corresponding main column.

The printing image data processing method and device provided by the present invention realize the printing image by dividing the matrix composed of network dots into main columns, duplicating the joints of each main column to form overlapping network dots, and re-determining printing separation points in the overlapping network dots. The data is divided more reasonably, so that the subsequent nozzles can effectively cover each dot in the corresponding main column, and the quality of the printed pattern can be improved.

Description of drawings

Figure 1 is a schematic diagram of the relative positional relationship between the ceramic inkjet printer nozzle and the conveyor belt;

Fig. 2 is the flowchart of the embodiment of the present invention;

Fig. 3A is the division method of the Kth and K+1th main columns in the same row;

Fig. 3B is a schematic diagram of overlapping dots formed after processing;

Fig. 4 is a schematic diagram of a dot matrix processed by the embodiment of the printing image data processing method;

FIG. 5 is a schematic structural diagram of an embodiment of a print image data processing device according to the present invention.

detailed description

This embodiment provides a print image data processing method, as shown in FIG. 2 , including:

S21. Divide the print image data into at least two main columns according to the number of nozzles, the print image data is a matrix of M rows and N columns consisting of M*N network dots formed after the picture is color-separated and hung on the net, M , N is a positive integer, M≥1, N≥4.

The print image data in this embodiment refers to a format file that can be directly printed by a printing device after the image stored in a processing device such as a computer is processed by color separation and screen hanging, that is, it includes a plurality of files arranged in M* N matrix of dots. Of course, the specific values of M and N depend on the size of the image data. Generally speaking, the image data is large, that is, M and N can be 10 or more than 100, or even tens of thousands to several million.

Wherein, dividing the print image data into at least two main columns refers to dividing such a matrix of M rows and N columns composed of MN dots into more than two main columns, and each main column includes at least two and the total number of the main columns can be determined according to the number of nozzles of the printing equipment, and the lateral width of each main column can also be determined according to the ejection capacity of the nozzles, so that each nozzle can print ink in its corresponding main column outlets. For example, when the printing device has H nozzles arranged in the horizontal direction (H≥2), the total number of main columns can be N+1, and each main column can contain the same number of dots, that is, each main column can include N/H columns of dots, and the first nozzle prints the dots corresponding to the first main column, and so on, the Hth nozzle prints the dots corresponding to the Hth main column.

S22. Process the dots in each row of the matrix, so that the X dots at the end of the K main column in each row of dots are overlapped with the X dots at the head of the K+1 main column of the row, and X and K are Positive integer, 1≤X, 1≤K≤N-1.

The head end and tail end are relative to the multiple dots of each main column in each row, the end connected to the previous main column is the head end, and the end connected to the next main column is the tail end.

Specifically, the two ends or one end of each main column in each row of dots can be processed at the same time, so that the X dots at the junction of two adjacent main columns in the same row overlap to form repeated dots; of course, For the dots in the same row of dots that correspond to the first or last main column, only the X dots at the end of the dots corresponding to the first main column need to be processed, and the X dots at the beginning of the last main column need to be processed. processing, and the head end and tail end outlets of the outlets corresponding to the rest of the main columns are processed respectively.

The specific processing methods can be various, for example, the head end of a series of dots corresponding to the K+1 main column in each row can be increased by X dots at the end of a series of dots corresponding to the Kth main column in the row For the same X overlapped dots, the arrangement order of the X overlapping dots in the K+1 main column is consistent with the arrangement order of the X dots at the end of the K main column. FIG. 3A shows the K-th and K+1-th main column division methods in the same row, and FIG. 3B shows the positions of the repeated dots formed after processing. Alternatively, it is also possible to add X dots at the end of a series of dots corresponding to the K main column in the same row that are the same as the first X dots in the series of dots corresponding to the K+1th main column.

S23. Set the printing division point in the X overlapping dots of the Kth main column and the K+1 main column in each row of the matrix, and set the printing division point in the Kth main column to the end of the end dot removal, and remove the dots between the first dot in the K+1th main column and the printing division point, so that the printer control system controls the nozzle to print the dots of the corresponding main column.

On the one hand, the t-th one of the sequence composed of X repeated network dots can be used as the printing division point, where t is a positive integer, 1≤t≤X, and it is guaranteed that each printing division point in the same line is relative to its location The positions of overlapping outlets are the same, for example, when there are 5 overlapping outlets, each overlapping outlet in the same row (including the overlapping outlets corresponding to each main column, that is, the overlapping outlet at the end of the first main column, the last main the overlapping dots at the head of the column, and the overlapping dots at the beginning and end of the remaining main columns) as the print separation point; that is, when the dot overlap of 5 dots is at the dot end of a main column , among the five dots in the above overlapping dots, the one dot farthest from the end is the first dot, and the dot adjacent to this dot, which is also the fourth overlapping dot from the end, is the printing separation point. When five dots are located in a For the head of the dots in the main column, the dot at the farthest point from the top of the above five dots is the first dot, and the dot adjacent to the overlapping dot is the printing separation point.

After the printing separation point is determined, one overlapping dot from the printing separation point to the end of the overlapping dots at the end of a main column can be removed, leaving only the first overlapping dot to the printing separation point and the overlap between them At the same time, the overlapped dots between the first overlapping dot at the head end and the printing split point can be removed from a series of overlapping dots located at the head of a main column, leaving only the t+1th overlapping dot to the distance from the first end of the most overlapping dots. X-t overlapping outlets between one outlet away.

On the other hand, the printing dividing point can also be a point other than the screen dot. At this time, the printing dividing point can be used as a boundary to divide an overlapping network dot sequence into two parts. When the overlapping network dot is at the end of a main column, then Remove all dots from the print split point to the end of the end, and when the overlapping dots are at the beginning of a main column, remove all dots between the 1st and the print split point.

In addition, it should be noted that, among the dots of different rows, the positions of the printing division points relative to the overlapping dots may be different, and the rule to be followed may be set according to specific requirements. For example, for the dots in the first row, the second from the left among the five overlapping dots can be used as the printing split point; for the dots in the second row, the third overlapping dot from the left among the five overlapping dots can be used as To print the split point, for the dots in the third row, the fourth overlapping dot from the left among the five overlapping dots can be used as the print split point; and the 4th to 6th lines below can be set by repeating the above 1 to 3 lines Print split points. Of course, there are many ways to set the print segmentation, and no matter which one is used, the subsequent removal of overlapping dots can use a removal process similar to the above. During the printing process of the subsequent printer, each nozzle prints all the dots in its corresponding main column; The above method is used to set the printing division point between the two main columns, so that the printing division point is used as the division boundary between adjacent main columns, and each nozzle prints the dots covered by its corresponding main column.

Using the printing image data processing method provided in this embodiment, by dividing the matrix composed of network dots into main columns, duplicating the joints of each main column to form overlapping network dots, and re-determining printing separation points in the overlapping network dots, the printing image is realized. The data is more reasonably separated, so that the subsequent nozzles can effectively cover the dots in the corresponding main column, and the quality of the printed pattern can be improved.

Further, setting the printing division points in the X overlapping dots of the Kth main column and the K+1th main column in each row of the matrix may specifically include:

First, determine the distance of the printing division point in each row of network points relative to the endpoint in the overlapping network point; wherein, the terminal point can be the first network point in the overlapping network point sequence of the head end and/or tail end of a main column, or Overlaps the last dot in the dot sequence for the beginning and/or end of a main column.

Preferably, the distances between the printing division points in each row of dots relative to the endpoints in the overlapping dots are respectively determined, which may specifically be:

$\mathrm{<span\; class="notranslate">\; f</span>}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; z</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; A</span>}\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; *</span>\mathrm{<span\; class="notranslate">\; cos</span>}<span\; class="notranslate">\; (</span>\frac{\mathrm{<span\; class="notranslate">\; 2</span>}\mathrm{<span\; class="notranslate">\; \&pi;z</span>}}{\mathrm{<span\; class="notranslate">\; no</span>}\mathrm{<span\; class="notranslate">\; 1</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; A</span>}\mathrm{<span\; class="notranslate">\; 2</span>}<span\; class="notranslate">\; *</span>\mathrm{<span\; class="notranslate">\; cos</span>}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 2</span>}\mathrm{<span\; class="notranslate">\; \&pi;</span>}<span\; class="notranslate">\; *</span>\frac{\mathrm{<span\; class="notranslate">\; z</span>}}{\mathrm{<span\; class="notranslate">\; no</span>}\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; +</span>\frac{\mathrm{<span\; class="notranslate">\; \&pi;</span>}}{\mathrm{<span\; class="notranslate">\; 4</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; +</span>\frac{\mathrm{<span\; class="notranslate">\; d</span>}}{\mathrm{<span\; class="notranslate">\; 2</span>}}$

Among them, z represents the corresponding row in the M*N matrix, 1≤z≤M; n1 is the preset low-frequency period, and the printing segmentation points formed according to the needs can be arranged in the direction of the first to M rows. The maximum length is set; n2 is the preset high-frequency cycle, which can be set according to the minimum length of the part where the print segmentation points need to be formed in the direction of the first to M rows and the shape repeats; A1 is the preset low-frequency cycle The amplitude corresponding to n1; A2 is the amplitude corresponding to the preset high-frequency period n2, wherein, A1+A2=d, A1:A2=1:3; d is the length of X described overlapping dots, preferably, A1= d/8; A2=3*d/8, n1 can take any value between 4mm and 6mm (including 4mm and 6mm), n2 can take a value less than 0.4mm, and π/4 can be formed between n1 and n2 the phase angle of .

According to the above formula, the distribution of the value corresponding to each line z is shown in Figure 4, that is, as the number of lines increases, the printing separation points are arranged in a curve that changes according to the law of the above formula.

Then, determine the position of the printing division point in the overlapping dots according to the distance. That is, the electricity that is the above-mentioned distance to the end point is set as the printing division point, and the printing division point can just fall on the network dot that constitutes the overlapping network dot, and can also fall between two network dots. When the printing separation point is located on the dots that constitute overlapping dots, you can remove the dots in the previous main column and keep them in the adjacent next main column, or you can keep the dots in the previous main column and leave them in the next main column. The adjacent next main column is removed.

At this time, before step 21, it may also include the step of setting the preset low-frequency cycle n1 and preset cycle n2, and the amplitude A1 corresponding to the preset low-frequency cycle n1; the step of setting the amplitude A2 corresponding to the preset high-frequency cycle n2.

In this embodiment, by setting the positions of periodically distributed printing separation points, it is possible to more reasonably divide the printing image data, so that when the nozzle prints the main column corresponding to the printing image data, it can avoid continuous generation of missed spraying and repeated printing in the vertical direction. Inkjet phenomenon, thus avoiding the occurrence rate of white lines and black lines, and improving the quality of printed patterns.

Fig. 5 is a schematic structural diagram of an embodiment of a print image data processing device of the present invention; as shown in Fig. 5 , another embodiment of the present invention provides a print image data processing device, including:

The division module 51 is used to divide the print image data into at least two main columns according to the number of nozzles, and the print image data is M rows and N columns composed of M*N network dots formed after the picture is subjected to color separation and screen hanging The matrix of , M and N are positive integers, M≥1, N≥4;

The dot processing module 52 is used to process the dots in each row of the matrix, so that the X dots at the end of the K main column in each row of dots overlap with the X dots at the head of the K+1 main column of the row, and X , K is a positive integer, 1≤X, 1≤K≤N-1;

The setting module 53 is used to set the printing division point in the X overlapping dots of the Kth main column and the K+1th main column in each row of the matrix, and set the printing division point in the Kth main column to removing the last dot at the tail end, and removing the first dot at the first end in the K+1th main column to the printing division point, so that the printer control system controls the nozzle to print the dots of the corresponding main column .

The device described in this embodiment is used to execute S21-S23 in the method described in the foregoing embodiments, and the implementation principles and technical effects of its specific functions are similar to those described above, and will not be repeated here.

Those of ordinary skill in the art can understand that all or part of the steps for implementing the above method embodiments can be completed by program instructions and related hardware. The aforementioned program can be stored in a computer-readable storage medium. When the program is executed, it executes the steps including the above-mentioned method embodiments; and the aforementioned storage medium includes: ROM, RAM, magnetic disk or optical disk and other various media that can store program codes.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the various embodiments of the present invention. scope.

Claims (4)

1. a kind of print image data processing method is it is characterised in that include：

Print image data is divided into by least two chief series according to shower nozzle number, described print image data is that picture is carried out color separation Being formed after linked network, the M row of M*N site composition, the matrix of N row, M, N are positive integer, M >=1, N >=4；

Site during described matrix is often gone is processed so that every X site of K chief series tail end and this row the in row site X site of K+1 chief series head end is overlapping, and X, K are positive integer, 1 ＜ X, 1≤K≤N-1；

Described matrix often go described K chief series and described K+1 chief series X overlapping site in setting print cut-point, general Print cut-point described in K chief series to remove to tail end most end site, and by the 1st net of head end described in described K+1 chief series Point removes to described printing cut-point, so that printer control system controls the site of the corresponding described chief series of nozzle printing；

Described described matrix often go described K chief series and described K+1 chief series X overlapping site in setting print and split Point, specifically includes：

Determine the distance often printing the end points in the relatively described overlap site of cut-point described in row site respectively；

Determine the position printing cut-point in described overlap site according to described distance；

Wherein, determine the distance often printing the end points in the relatively described overlap site of cut-point described in row site respectively, specifically For：

According to

Determine described distance；

Wherein, z represents corresponding row in described matrix, and 1≤z≤M, n1 are the default low-frequency cycle, and n2 is default high frequency period, A1 For presetting low-frequency cycle corresponding amplitude；A2 is the default corresponding amplitude of high frequency period, and d is the length of X described overlap site.

2. print image data processing method according to claim 1 is it is characterised in that between the adjacent row of described matrix The described distance difference printing the end points in the relatively described overlap site of separation.

3. print image data processing method according to claim 1 and 2 will be it is characterised in that described will according to shower nozzle number Before print image data is divided at least two chief series, also include：

Obtain the number of described shower nozzle, to determine the sum of described chief series according to described shower nozzle number, wherein, described shower nozzle number is equal to The quantity of described chief series.

4. a kind of print image data processing meanss are it is characterised in that include：

Division module, for print image data being divided at least two chief series according to shower nozzle number, described print image data is Picture is carried out matrixes that formed after color separation linked network, the M row of M*N site composition, N row, M, N are positive integer, M >=1, N >= 4；

Site processing module, is processed so that every K chief series tail end in row site for the site during described matrix is often gone X site overlapping with X site of this row K+1 chief series head end, X, K be positive integer, 1 ＜ X, 1≤K≤N-1；

Setup module, for described matrix often go described K chief series and described K+1 chief series X overlapping site in setting Print cut-point, remove printing cut-point described in K chief series to tail end most end site, and by institute in described K+1 chief series State the 1st site of head end to remove to described printing cut-point, so that printer control system controls nozzle printing corresponding described The site of chief series；

Setup module, specifically for：

Determine the distance often printing the end points in the relatively described overlap site of cut-point described in row site respectively；

Determine the position printing cut-point in described overlap site according to described distance；

Wherein, determine the distance often printing the end points in the relatively described overlap site of cut-point described in row site respectively, specifically For：

According to

Determine described distance；

Wherein, z represents corresponding row in described matrix, and 1≤z≤M, n1 are the default low-frequency cycle, and n2 is default high frequency period, A1 For presetting low-frequency cycle corresponding amplitude；A2 is the default corresponding amplitude of high frequency period, and d is the length of X described overlap site.