CN106204680A - A kind of imaging device and formation method thereof - Google Patents

Abstract

The invention discloses an imaging device and an imaging method thereof. The light of an object is transmitted through a lens group, so that the object is imaged on the focal plane of the image side of the lens group; a processor controls the detector on the focal plane of the image side of the lens group. The frequency domain image of the scanned object; the processor processes the scanned frequency domain image to obtain the time domain image of the object. Since the detector pixels used to record frequency-domain image information are small in scale, the detector is placed on the focal plane of the image square of the lens group to scan the frequency-domain image of the object, and the frequency-domain image can be obtained by using a small-scale pixel detector. The feature information of the image, the time domain image of the object can be obtained by transforming the feature information in the obtained frequency domain image. As a result, the pixel size of the detector is reduced, which saves device costs; and the use of small-scale pixel detectors for image scanning reduces the amount of detected data, thereby reducing the amount of data storage and transmission.

Description

An imaging device and imaging method thereof

technical field

The invention relates to the field of imaging technology, in particular to an imaging device and an imaging method thereof.

Background technique

With the development of information technology, in the fields of medical biology and other fields, in order to better observe the characteristics and details of living things, when shooting and imaging living things and their environments, the pixel scale required is getting larger and larger. The scale of the pixels that need to be observed increases, and in order to obtain a large-scale pixel image, it is necessary to use a large-scale pixel array to detect it. Therefore, the cost caused by the detector alone will increase significantly. At the same time, due to the increase in pixel scale, it will also cause difficulties in storage and data transmission when using detectors for detection.

Contents of the invention

Embodiments of the present invention provide an imaging device and an imaging method thereof, which are used to obtain large-scale pixel images by using a small-scale color image detector, so as to save device costs and reduce data storage and transmission volumes.

In the first aspect, an embodiment of the present invention provides an imaging device, including: a lens group, a detector, and a processor electrically connected to the detector; wherein, the detector is located at the focal plane of the image side of the lens group superior;

The lens group is used to transmit the light of the object, so that the object is imaged on the focal plane of the image side of the lens group;

The processor is configured to control the detector to scan the frequency-domain image of the object on the focal plane of the image side of the lens group, and process the scanned frequency-domain image to obtain a time frame of the object. domain image.

In a possible implementation manner, the above device provided in the embodiment of the present invention further includes: a driving module connected to the detector;

The processor is specifically configured to send a signal to the drive module to control the movement of the detector on the focal plane of the image side of the lens group;

The driving module is configured to drive the detector to scan the frequency-domain image of the object on the image-side focal plane of the lens group according to the received signal.

In a possible implementation manner, the above-mentioned device provided in the embodiment of the present invention further includes: a filter connected between the detector and the processor;

The filter is configured to filter the frequency-domain image scanned by the detector and send it to the processor.

In a possible implementation manner, in the above device provided by the embodiment of the present invention, the detector is an array detector.

In a second aspect, an embodiment of the present invention provides an imaging method based on any of the above imaging devices, including:

The lens group transmits the light of the object, so that the object is imaged on the focal plane of the image side of the lens group;

The processor controls the detector to scan the frequency-domain image of the object on the image-side focal plane of the lens group;

The processor processes the scanned frequency-domain image to obtain a time-domain image of the object.

In a possible implementation manner, in the above method provided by the embodiment of the present invention, the processor controls the detector to scan the frequency-domain image of the object on the image-side focal plane of the lens group, including :

The processor sends a control signal to the drive module;

The driving module drives the detector to scan the frequency-domain image of the object on the image-side focal plane of the lens group according to the received control signal.

In a possible implementation manner, in the above method provided by the embodiment of the present invention, the processor sending a control signal to the driving module includes:

The processor sends a plurality of scan control signals with area identifications to the drive module;

The drive module drives the detector to scan the frequency-domain image of the object on the image-side focal plane of the lens group according to the control signal, including:

The drive module respectively drives the detector to scan the frequency domain image of the object in each area of the image square focal plane corresponding to each of the area identifications according to each of the scanning control signals, and obtains each of the area identifications Corresponding frequency domain image.

In a possible implementation manner, in the above method provided by the embodiment of the present invention, the processor processes the scanned frequency-domain image to obtain the time-domain image of the object, including:

The processor superimposes the frequency-domain images corresponding to each of the region identifiers, and processes the superimposed frequency-domain images to obtain a time-domain image of the object.

In a possible implementation manner, in the above method provided by the embodiment of the present invention, the processor superimposes the frequency-domain images corresponding to each of the region identifiers, and processes the superimposed frequency-domain images Obtaining a time-domain image of the object, comprising:

The processor superimposes the frequency-domain images corresponding to each of the region identifiers, and performs an inverse Fourier transform on the superimposed frequency-domain images to obtain a time-domain image of the object.

In a possible implementation manner, in the above method provided by the embodiment of the present invention, before the processor superimposes the frequency domain images corresponding to each of the region identifiers, it further includes:

The filter performs filtering processing on the frequency-domain images corresponding to each of the area identifiers scanned by the detector and then sends them to the processor;

The processor superimposes the frequency domain images corresponding to each of the region identifiers, including:

The processor superimposes the filtered frequency-domain images corresponding to the region identifiers.

The beneficial effects of the present invention are as follows:

In the imaging device and imaging method provided by the embodiments of the present invention, the light of the object is transmitted through the lens group, so that the object is imaged on the focal plane of the image side of the lens group; the processor controls the detector on the focal plane of the image side of the lens group The frequency domain image of the scanned object; the processor processes the scanned frequency domain image to obtain the time domain image of the object. Since the object is imaged on the focal plane of its image side through the lens group, its frequency domain image corresponds to the time domain image, which contains all the feature information of the image. Therefore, the frequency domain image of the object is scanned by placing the detector on the image square focal plane of the lens group, and the characteristic information of the frequency domain image can be obtained by using a small-scale pixel detector. The time-domain image of the object can be obtained by performing transformation processing. As a result, the pixel size of the detector is reduced, which saves device costs; and the use of small-scale pixel detectors for image scanning reduces the amount of detected data, thereby reducing the amount of data storage and transmission.

Description of drawings

FIG. 1 is one of the structural schematic diagrams of an imaging device in an embodiment of the present invention;

Fig. 2 is the second structural schematic diagram of the imaging device in the embodiment of the present invention;

Fig. 3 is one of the flowcharts of the imaging method in the embodiment of the present invention;

FIG. 4 is the second flowchart of the imaging method in the embodiment of the present invention.

detailed description

Embodiments of the present invention provide an imaging device and an imaging method thereof, which are used to obtain large-scale pixel images by using a small-scale color image detector, so as to save device costs and reduce data storage and transmission volumes.

In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

The imaging device and the imaging method thereof provided by specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

As shown in Figure 1, the imaging device provided by the embodiment of the present invention includes: a lens group 11, a detector 12, and a processor 13 electrically connected to the detector 12; on flat surface;

The lens group 11 is used to transmit the light of the object, so that the object is imaged on the focal plane of the image side of the lens group;

The processor 13 is configured to control the detector 12 to scan the frequency-domain image of the object on the focal plane of the image side of the lens group 11, and process the scanned frequency-domain image to obtain a time-domain image of the object.

Since the object is imaged on the focal plane of its image side through the lens group, its frequency domain image corresponds to the time domain image, which contains all the feature information of the image. Therefore, the frequency domain image of the object is scanned by placing the detector on the image square focal plane of the lens group, and the characteristic information of the frequency domain image can be obtained by using a small-scale pixel detector. The time-domain image of the object can be obtained by performing transformation processing. As a result, the pixel size of the detector is reduced, which saves device costs; and the use of small-scale pixel detectors for image scanning reduces the amount of detected data, thereby reducing the amount of data storage and transmission.

In specific implementation, in the above-mentioned device provided by the embodiment of the present invention, as shown in FIG. 2 , it also includes: a drive module 14 connected to the detector 12;

The processor 13 is specifically configured to send a signal to the drive module 14 to control the movement of the detector 12 on the focal plane of the image side of the lens group 11;

The driving module 14 is configured to drive the detector 12 to scan the frequency domain image of the object on the focal plane of the image side of the lens group 11 according to the received signal.

During specific implementation, the processor 13 controls the detector through the drive module 14, for example, the processor 13 can send a control signal to the drive module to enable the detector 12 to be turned on or off, and then the drive module 14 drives the start of the detector 12 and close; or, the processor 13 may send a movement control signal of the detector 12 to the driving module, and the driving module 14 drives the detector 12 to move to a corresponding position for image scanning according to the control signal.

In specific implementation, in the above-mentioned device provided by the embodiment of the present invention, as shown in FIG. 2 , it also includes: a filter 15 connected between the detector 12 and the processor 13;

The filter 15 is configured to filter the frequency-domain image scanned by the detector 12 and send it to the processor 13 .

Because in the frequency domain image of an object, the center is concentrated as low frequency information, which corresponds to the outline in the time domain image; the surrounding area is high frequency information, which corresponds to the details in the time domain image. Therefore, according to the image information to be observed in the time domain image, corresponding filtering processing can be performed on the frequency domain image scanned by the detector 12 . In addition, the filter 15 can also perform smoothing or strengthening processing on the scanned frequency domain image.

In a specific implementation, in the above device provided by the embodiment of the present invention, the detector 12 is an array detector.

Since the scanning pixel range of a single detector is limited, when the scanning range of a single detector cannot cover the image area to be acquired by the frequency domain image, an array detector can be used to scan the frequency domain image. In a specific implementation, after the array detector sends the scanned frequency-domain image to the processor 13, the processor 13 can uniformly integrate and subsequently process the scanned image.

Based on the same inventive concept, an embodiment of the present invention also provides an imaging method based on any of the above-mentioned imaging devices, as shown in FIG. 3 , including the following steps:

S301. The lens group transmits the light of the object, so that the object is imaged on the focal plane of the image side of the lens group;

S302. The processor controls the detector to scan the frequency-domain image of the object on the focal plane of the image side of the lens group;

S303. The processor processes the scanned frequency-domain image to obtain a time-domain image of the object.

Since the frequency domain image corresponds to the time domain image and contains all the feature information of the image, the detector is placed on the focal plane of the lens group to scan the frequency domain image of the object, and the image can be obtained by using a small-scale pixel detector The feature information of the object can be obtained by transforming the feature information in the obtained frequency domain image to obtain the time domain image of the object. As a result, the pixel size of the detector is reduced, which saves device costs; and the use of small-scale pixel detectors for image scanning reduces the amount of detected data, thereby reducing the amount of data storage and transmission.

Specifically, in the above step S302, the processor controls the detector to scan the frequency-domain image of the object on the focal plane of the image side of the lens group, which may specifically include:

The processor sends a control signal to the drive module;

The driving module drives the detector to scan the frequency domain image of the object on the focal plane of the image side of the lens group according to the received control signal.

In a specific implementation, the processor sends a control signal to the driving module, so that the driving module drives the detector to perform operations such as opening, closing, scanning and moving.

Further, in the above steps, the processor sends a control signal to the drive module, which may specifically include:

The processor sends multiple scan control signals with area identification to the drive module;

Correspondingly, the drive module drives the detector to scan the frequency-domain image of the object on the focal plane of the image side of the lens group according to the control signal, which may specifically include:

The driving module respectively drives the detector to scan the frequency-domain image of the object in each area of the image-space focal plane corresponding to each area identification according to each scanning control signal, and obtains the frequency-domain image corresponding to each area identification.

In specific implementation, the central part of the frequency-domain image of the object is low-frequency information, and the surrounding part is high-frequency information; wherein, the low-frequency information corresponds to the contour in the time-domain image, and the high-frequency information corresponds to the details in the time-domain image. Therefore, in When scanning the frequency-domain image, all the frequency-domain images can be divided into regions, and correspond to a region identifier respectively. When the processor sends the scan control signal to the drive module, the scan control signal it sends carries the above-mentioned region identifier; The module can respectively drive the detector to scan the corresponding part of the frequency domain image according to the area identification in the received scanning control signal. According to the actual time-domain image that needs to be observed, corresponding to the frequency in the frequency-domain image, the scanning area of the frequency-domain image can be flexibly adjusted without scanning all the frequency-domain images, thereby reducing the data storage and data during the scanning process. deal with.

Further, in the above step S303, the processor processes the scanned frequency-domain image to obtain the time-domain image of the object, which may specifically include:

The processor superimposes the frequency-domain images corresponding to each area identifier, and processes the superimposed frequency-domain images to obtain a time-domain image of the object.

From the above scanning process, it can be seen that after the detector scans the part of the frequency domain image corresponding to the area identifier, it will perform multiple scans in the area that needs to be observed, and in the above method provided by the embodiment of the present invention, in the There are multiple discrete points scanned in the frequency domain space, therefore, it is necessary to superimpose the discrete points in the frequency domain space scanned by the detector, and supplement data at the unscanned frequency points, usually in the unscanned The data at the frequency point of is 0. After image stacking, the time domain image of the object can be obtained by restoring the stacked frequency domain image.

Specifically, in the above steps, the processor superimposes the frequency-domain images corresponding to each area identifier, and processes the superimposed frequency-domain images to obtain a time-domain image of the object, which may specifically include:

The processor superimposes the frequency-domain images corresponding to the area marks, and performs inverse Fourier transformation on the superimposed frequency-domain images to obtain the time-domain image of the object.

It should be noted that the amplitude of the photoacoustic field of the lens in its object-space focal plane and image-space focal plane is a Fourier transform of each other, that is, after the reflected light of the object or the light emitted by the object passes through the lens group, its time-domain image The gray distribution function of the image is transformed into the frequency distribution function of the frequency domain image. Therefore, after the frequency domain image is determined, the frequency domain image of the object can be obtained by performing inverse Fourier transform on it. In practical application, the distance between the lens group and the object can be adjusted so that the object is located on the object focal plane of the lens group; and when the object is not located on the object focal plane of the lens group, the inverse Fourier transform can be performed The corresponding transformation of the added quadratic factor can also obtain the time domain image of the object.

Further, in the above method provided by the embodiment of the present invention, before the processor superimposes the frequency-domain images corresponding to each area identifier, it also includes:

The filter performs filtering processing on the frequency domain images corresponding to each area logo scanned by the detector and then sends it to the processor;

Correspondingly, the processor superimposes the frequency-domain images corresponding to each area identifier, which may specifically include:

The processor superimposes the frequency-domain images corresponding to the area identifiers after filtering.

During specific implementation, corresponding filtering processing may be performed on the frequency domain image scanned by the detector 12 according to the image information to be observed in the time domain image. In addition, the filter 15 can also perform smoothing or strengthening processing on the scanned frequency domain image.

The following is an example of an imaging method based on any of the above imaging devices, as shown in Figure 4, which specifically includes the following steps:

S401. The lens group transmits the light of the object, so that the object is imaged on the focal plane of the image side of the lens group;

S402. The processor sends a plurality of scan control signals with area identifications to the drive module;

S403. The drive module respectively drives the detector to scan the frequency-domain image of the object in each area of the image square focal plane corresponding to each area identification according to each scanning control signal, and obtains the frequency-domain image corresponding to each area identification;

S404. The filter performs filter processing on the frequency-domain images corresponding to each area identifier scanned by the detector, and then sends it to the processor;

S405. The processor superimposes the filtered frequency-domain images corresponding to the region identifiers, and performs an inverse Fourier transform on the superimposed frequency-domain images to obtain a time-domain image of the object.

In the imaging device and imaging method provided by the embodiments of the present invention, the light of the object is transmitted through the lens group, so that the object is imaged on the focal plane of the image side of the lens group; the processor controls the detector on the focal plane of the image side of the lens group The frequency domain image of the scanned object; the processor processes the scanned frequency domain image to obtain the time domain image of the object. Since the object is imaged on the focal plane of its image side through the lens group, its frequency domain image corresponds to the time domain image, which contains all the feature information of the image. Therefore, the frequency domain image of the object is scanned by placing the detector on the image square focal plane of the lens group, and the characteristic information of the frequency domain image can be obtained by using a small-scale pixel detector. The time-domain image of the object can be obtained by performing transformation processing. As a result, the pixel size of the detector is reduced, which saves device costs; and the use of small-scale pixel detectors for image scanning reduces the amount of detected data, thereby reducing the amount of data storage and transmission.

Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these modifications and variations.

Claims (10)

1. an imaging device, it is characterised in that including: battery of lens, detector, and and the process of described detector electrical connection Device；Wherein, described detector is positioned on the image space focal plane of described battery of lens；

Described battery of lens, for the light of object is carried out transmission, makes described image objects put down in image space Jiao of described battery of lens On face；

Described processor, scans the frequency domain of described object for controlling described detector on the image space focal plane of described battery of lens Image, and carry out the described frequency domain figure picture scanned processing the time-domain diagram picture obtaining described object.

2. device as claimed in claim 1, it is characterised in that also include: the driving module being connected with described detector；

Described processor, puts down image space Jiao of described battery of lens specifically for sending the described detector of control to described driving module The signal of movement on face；

Described driving module, for driving described detector to sweep on the image space focal plane of described battery of lens according to the signal received Retouch the frequency domain figure picture of described object.

3. device as claimed in claim 2, it is characterised in that also include: be connected to described detector and described processor it Between wave filter；

Described wave filter, for described detector scanning to described frequency domain figure picture be filtered processing after send to described place Reason device.

4. the device as described in any one of claim 1-3, it is characterised in that described detector is detector array.

5. a formation method based on the imaging device as described in any one of claim 1-4, it is characterised in that including:

Described battery of lens carries out transmission to the light of object, makes described image objects on the image space focal plane of described battery of lens；

Described processor controls described detector and scans the frequency domain figure picture of described object on the image space focal plane of described battery of lens；

The described frequency domain figure picture scanned is carried out processing the time-domain diagram picture obtaining described object by described processor.

6. method as claimed in claim 5, it is characterised in that described processor controls described detector at described battery of lens The frequency domain figure picture of described object is scanned on image space focal plane, including:

Described processor sends control signal to described driving module；

Described driving module drives described detector in the image space focal plane of described battery of lens according to the described control signal received The frequency domain figure picture of the described object of upper scanning.

7. method as claimed in claim 6, it is characterised in that described processor sends control signal to described driving module, Including:

Described processor sends multiple scan control signals with area identification to described driving module；

Described driving module drives described detector to scan on the image space focal plane of described battery of lens according to described control signal The frequency domain figure picture of described object, including:

Described driving module drives described detector corresponding at each described area identification according to each described scan control signal respectively Described image space focal plane each scanned in regions described in the frequency domain figure picture of object, it is thus achieved that the frequency domain that each described area identification is corresponding Image.

8. method as claimed in claim 7, it is characterised in that at the described processor described frequency domain figure picture to scanning Reason obtains the time-domain diagram picture of described object, including:

The frequency domain figure picture that each described area identification is corresponding is overlapped by described processor, and to the described frequency domain figure picture after superposition Carry out processing the time-domain diagram picture obtaining described object.

9. method as claimed in claim 8, it is characterised in that the frequency domain figure that described processor is corresponding to each described area identification As being overlapped, and carry out the described frequency domain figure picture after superposition processing the time-domain diagram picture obtaining described object, including:

The frequency domain figure picture that each described area identification is corresponding is overlapped by described processor, and to the described frequency domain figure picture after superposition Carry out inversefouriertransform, it is thus achieved that the time-domain diagram picture of described object.

10. method as claimed in claim 9, it is characterised in that at the frequency that described processor is corresponding to each described area identification Before area image is overlapped, also include:

Described wave filter to described detector scanning to frequency domain figure picture corresponding to each described area identification be filtered processing after Send to described processor；

The frequency domain figure picture that each described area identification is corresponding is overlapped by described processor, including:

The frequency domain figure picture that each described area identification after processing after filtering is corresponding is overlapped by described processor.