CN112166595B - Configuration method and device of shooting device - Google Patents
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Abstract
A configuration method of a photographing device, the photographing device comprises an image sensor (102), the image sensor (102) comprises a plurality of photosensitive units; the shooting device determines a pixel reading coefficient according to a set image mode, wherein the pixel reading coefficient is used for identifying the number of photosensitive units for reading a single pixel value in an image; acquiring frequency characteristic parameters of a lens carried by the shooting device; judging whether the pixel reading coefficient meets the condition set by the corresponding frequency characteristic parameter; if yes, configuring a shooting device according to the pixel reading coefficient; by adopting the method, the shooting device can improve the quality of the shot image under the condition of supporting the currently adopted shooting mode.
Description
Technical Field
The present disclosure relates to the field of image processing, and more particularly, to a configuration method of a camera and a device thereof.
Background
Cameras are generally composed of a body, a lens, a sensor, and the like, wherein the sensor of the camera can predefine several relatively common modes for realizing different functions. For example, a full-size mode for photographing, a video mode for various general specifications, such as 8K, 6K, 4K, 2.7K, etc.; a 960 frame per second (fps) mode for recording slow motion, a 100fps mode for focusing, etc. Wherein the predefined mode of the camera sensor is fixed and the corresponding mode parameters are also fixed. In support of the currently employed shooting mode, how to improve the image quality becomes a problem to be solved.
Disclosure of Invention
The embodiment of the application provides a configuration method, a configuration device and a configuration device of a shooting device, which can improve the quality of shot images.
In a first aspect, an embodiment of the present application provides a method for configuring a camera, where the method includes:
determining a pixel reading coefficient according to the set image mode of the shooting device, wherein the pixel reading coefficient is used for identifying the number of photosensitive units with single pixel values in a read image;
acquiring frequency characteristic parameters of a lens carried by the shooting device;
judging whether the pixel reading coefficient meets the condition set corresponding to the frequency characteristic parameter or not;
and if so, configuring the shooting device according to the pixel reading coefficient.
In a second aspect, an embodiment of the present application provides a configuration apparatus of a shooting apparatus, including a memory and a processor;
the memory is used for storing program codes;
the processor, calling the program code, when the program code is executed, is configured to:
determining a pixel reading coefficient according to the set image mode of the shooting device, wherein the pixel reading coefficient is used for identifying the number of photosensitive units with single pixel values in a read image;
acquiring frequency characteristic parameters of a lens carried by the shooting device;
judging whether the pixel reading coefficient meets the condition set corresponding to the frequency characteristic parameter or not;
and if so, configuring the shooting device according to the pixel reading coefficient.
In a third aspect, an embodiment of the present application provides a shooting device, including:
a camera for capturing an image;
an image sensor including a plurality of light sensing units; the image sensor is used for realizing the configuration method of the shooting device according to the first aspect.
In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed, the computer program implements the configuration method of the photographing apparatus according to the first aspect.
The embodiment of the application provides a configuration method of a shooting device, wherein the shooting device comprises an image sensor, and the image sensor comprises a plurality of photosensitive units. The shooting device determines a pixel reading coefficient according to a set image mode, wherein the pixel reading coefficient is used for identifying the number of photosensitive units for reading a single pixel value in an image. Acquiring frequency characteristic parameters of a lens carried by the shooting device; judging whether the pixel reading coefficient meets the condition set corresponding to the frequency characteristic parameter or not; and if so, configuring the shooting device according to the pixel reading coefficient. By adopting the method, the shooting device can improve the quality of the shot image under the condition of supporting the currently adopted shooting mode.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a shooting device according to an embodiment of the present disclosure;
FIG. 2 is a schematic diagram of an image sensor;
fig. 3 is a schematic flowchart of a configuration method of a camera according to an embodiment of the present disclosure;
FIG. 4 is a diagram illustrating the degree of peak shift of a lens for different frequency points;
fig. 5 is a schematic flowchart of a configuration method of a camera according to an embodiment of the present disclosure;
fig. 6 is a schematic structural diagram of a configuration device of a shooting device according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.
Cameras are generally composed of a body, a lens, a sensor, and the like, wherein the sensor of the camera can predefine several relatively common modes for realizing different functions. For example, a full-size mode for photographing, a video mode for various general specifications, such as 8K, 6K, 4K, 2.7K, etc.; a 960 frame per second (fps) mode for recording slow motion, a 100fps mode for focusing, etc. Wherein the predefined mode of the camera sensor is fixed and the corresponding mode parameters are also fixed. For example, if the camera adopts the full resolution mode, the resolution of the image captured by the camera adopting the full resolution mode is high (e.g., the resolution is 4k × 3k), but the frame rate is low (e.g., the frame rate is 30 fps). For example, if the camera adopts the binning mode, the resolution of an image captured by the camera in this mode is lower than that of an image captured in the full resolution mode, but the frame rate is increased. Under different shooting scenes, the requirements of users for shot images are different. However, once the shooting mode is determined, the current camera cannot modify the mode parameters, so that the extended shooting requirements of the user cannot be met.
In order to solve the above problem, an embodiment of the present application provides a method for configuring a photographing device, wherein the photographing device includes an image sensor including a plurality of light sensing units. Determining a pixel reading coefficient according to a set image mode, wherein the pixel reading coefficient is used for identifying the number of photosensitive units for reading a single pixel value in an image; acquiring frequency characteristic parameters of a lens carried by the shooting device; judging whether the pixel reading coefficient meets the condition set corresponding to the frequency characteristic parameter or not; and if so, configuring the shooting device according to the pixel reading coefficient. By adopting the method, the shooting device can improve the quality of the shot image under the condition of supporting the currently adopted shooting mode.
As shown in fig. 1, the photographing device provided in the embodiment of the present application includes a camera 101 and an image sensor 102. The camera 101 is used for capturing images, and includes a lens, a shutter, a photosensitive device, and the like. The image sensor 102 includes a light sensing unit for converting an optical image into a digital signal. Optionally, the photographing apparatus further includes a register 103, and the register 103 is configured to store the pixel readout coefficient. The image sensor 102 is configured as shown in fig. 2, and the image sensor 102 includes a light sensing unit, a data module, a communication module, a clock module, a connection module, a signal processing module, a digital-to-analog conversion module, and the like. The photosensitive unit is a core unit of the image sensor 102, and includes a capacitor, which can sense light and convert an image into a digital signal.
An embodiment of the present application provides a configuration method of a shooting device, please refer to fig. 3, which specifically includes the following steps:
s301, determining a pixel reading coefficient according to a set image mode, wherein the pixel reading coefficient is used for identifying the number of photosensitive units for reading a single pixel value in an image.
The user may set different image modes according to different shooting requirements, wherein the image mode of the camera may include, but is not limited to, a video recording mode, an Auto Focus (AF) mode, and the like. For example, when the user needs to record video with a camera, the video mode may be set to the video recording mode. Different image modes correspond to different pixel read coefficients, wherein the pixel read coefficients are used for identifying the number of the photosensitive units for reading a single pixel value in an image. The pixel readout coefficient may include, but is not limited to, a fraction or an integer greater than 0, and different values correspond to the number of light-sensing units of a single pixel value in different readout images. For example, when the pixel readout coefficient is 1/2, the pixel readout coefficient indicates that the number of light-sensing units reading out a single pixel value in an image is 2. For another example, when the pixel read coefficient is 2, the pixel read coefficient indicates that the number of light-receiving units for reading two pixel values in the image is 1. The value of the pixel readout coefficient is not limited in this embodiment.
Optionally, the pixel readout coefficients are read from a register connected to the image sensor. The module that the register is connected with the image sensor is used for storing a plurality of pixel reading coefficients corresponding to each image mode, and one image mode corresponds to a plurality of pixel reading coefficients. For example, when the set image mode is the AF mode, in the AF mode, a plurality of pixel readout coefficients may be provided. However, the higher the binding degree, the higher the pixel read-out coefficient, the higher the frame rate, and the higher the focusing rate, but the resolution of AF is sacrificed. The step of determining pixel readout coefficients according to the set picture mode may be controlling the image sensor to retrieve the pixel readout coefficients from the register.
And S302, acquiring the frequency characteristic parameters of the lens carried by the shooting device.
Specifically, the frequency characteristic parameter includes a peak frequency at which a maximum phase shift occurs in a lens mounted on the imaging device.
When an image is captured using a lens mounted on a photographing apparatus, a problem of peak shift (peak shift) may occur due to a spherical aberration effect of the lens. The difference between the positions of the actual image point and the ideal image point is referred to as spherical aberration. Spherical aberration is typically measured as the axial distance of the intersection of the actual ray at the image side and the optical axis relative to the intersection of the paraxial ray and the optical axis. When the spherical aberration of the lens is large, a problem of peak shift may be caused. Referring to fig. 4, fig. 4 is a schematic diagram illustrating the degree of peak shift of a lens for different frequency points. Wherein different line types represent different peak shift frequencies and degrees of peak shift. For example, fig. 4 includes 6 lines, one for each peak offset frequency. The peak shift frequency for the top line in fig. 4 is 10 line pairs/millimeter (lp/mm). Each line can be divided into a plurality of line segments, the slope of each line segment represents the degree of peak deviation, and the larger the slope, the higher the degree of peak deviation.
And S303, judging whether the pixel reading coefficient meets the condition set by the corresponding frequency characteristic parameter.
In order to avoid the lens from generating peak value shift, it may be determined whether the pixel readout coefficient corresponding to the set video mode satisfies the set condition. Wherein the conditions set are set according to the peak frequency of the lens, an MTF optical frequency determined based on a Nyquist frequency of the camera pixel, and a normalized digital filter frequency of the camera.
Optionally, the set conditions are: the pixel readout coefficient is less than the smaller of the first ratio and the second ratio. Wherein the first ratio is a ratio of the normalized digital filter frequency to the peak frequency; the second ratio is a ratio of a normalized digital filter frequency to the MTF optical frequency.
For example, the set condition may be represented by the following formula:
Y<max(0.5/X1,0.5/X3)
wherein Y represents a pixel readout coefficient, X1Representing the peak frequency, X, of the shot3Representing the MTF optical frequency. To determine the pixel readout coefficients, the peak frequency of the lens, the MTF optical frequency, and the normalized digital filter frequency need to be determined.
The normalized digital filter frequency value in this embodiment is 0.5, which is a fixed value. The value principle is as follows: according to the nyquist sampling theorem, the sampling frequency must be 2 times or more the highest frequency of the signal so as not to cause signal aliasing, and therefore the highest signal frequency can be sampled to be half of the sampling frequency. The normalized frequency is the result of normalizing the physical frequency to the sampling frequency, and the highest signal frequency is half of the sampling frequency, i.e. the corresponding normalized frequency is 0.5. The peak frequency of the lens can be obtained by optical testing, and the embodiment is not limited.
Wherein the MTF optical frequency is determined according to a nyquist frequency, wherein the nyquist frequency is determined according to a size of a light sensing unit of the image sensor. The size of the photosensitive unit of the image sensor can represent the number of output pixel points of the photosensitive unit, and different sizes of the photosensitive units correspond to different Nyquist frequencies. Wherein the nyquist frequency can be expressed by the following formula:
X2＝1000/2p
wherein, X2Representing the nyquist frequency and p the size of the light-sensing unit. According to Nyquist frequency X2The optical MTF frequency can be determined by the following equation:
X3＝X2/4
wherein, X3Denotes the optical MTF frequency, X2Representing the nyquist frequency. The optical MTF frequency in this embodiment takes the value of 1/4 of the nyquist frequency.
S304, if the pixel reading coefficient meets the condition set by the corresponding frequency characteristic parameter, configuring the shooting device according to the pixel reading coefficient.
When the pixel readout coefficient satisfies the set condition, the photographing device may be configured according to the pixel readout coefficient. When the pixel readout coefficient Y is larger than 1, the image sensor is controlled to add Y charges sensed by the photosensitive units together, and the Y charges are read out by one pixel. For example, when Y is 2, the image sensor is controlled to add together 2 charges sensed by the photosensitive unit, and read out in one pixel. In this case, the frame rate of the image may be increased, but the resolution of the image will be decreased. Optionally, when the pixel readout coefficient Y is smaller than 1, the image sensor is controlled to expand one charge sensed by the photosensitive unit to be read out by Y pixels. For example, when Y is 1/2, the image sensor is controlled to expand one charge sensed by the light sensing unit to 2 pixel readout. In this case, the resolution of the image may be increased, but the frame rate of the image may be decreased.
The embodiment of the application provides a configuration method of a shooting device, wherein the shooting device comprises an image sensor, and the image sensor comprises a plurality of photosensitive units. The shooting device determines a pixel reading coefficient according to a set image mode, wherein the pixel reading coefficient is used for identifying the number of photosensitive units for reading a single pixel value in an image. And acquiring the frequency characteristic parameters of the lens carried by the shooting device. Judging whether the pixel reading coefficient meets the condition set according to the corresponding frequency characteristic parameter; and if so, configuring the shooting device according to the pixel reading coefficient. By adopting the method, the shooting device can improve the quality of the shot image under the condition of supporting the currently adopted shooting mode.
An embodiment of the present application provides a configuration method of a shooting device, please refer to fig. 5, which specifically includes the following steps:
determining a pixel reading coefficient according to a set image mode, wherein the pixel reading coefficient is used for identifying the number of photosensitive units for reading a single pixel value in an image;
acquiring frequency characteristic parameters of a lens carried by the shooting device;
judging whether the pixel reading coefficient meets the condition set corresponding to the frequency characteristic parameter or not;
if yes, configuring the shooting device according to the pixel reading coefficient;
and if not, sending prompt information for prompting to replace the lens and/or prompting to replace the shooting mode.
The step of determining the pixel readout coefficient according to the set video mode may refer to S301 in the embodiment shown in fig. 3. The step of acquiring the frequency characteristic parameter of the lens mounted on the imaging device may refer to S302 in the embodiment shown in fig. 3. The step of determining whether or not the pixel readout coefficient meets the condition set corresponding to the frequency characteristic parameter may refer to S303 in the embodiment shown in fig. 3. If so, the step of configuring the photographing device according to the pixel readout coefficient may refer to S304 in the embodiment shown in fig. 3, which is not repeated herein.
Optionally, if the pixel readout coefficient does not meet the condition set corresponding to the frequency characteristic parameter, sending a prompt message for prompting to replace the lens and/or prompting to replace the shooting mode. When the pixel readout coefficient does not meet the set condition, a peak shift problem may be caused if the image is continuously captured using the lens or the shooting mode. The camera may issue a prompt message for prompting replacement of the lens and/or for prompting replacement of the shooting mode. The mode of sending the prompt message by the shooting device may include, but is not limited to, displaying the prompt message through a display interface, playing a prompt tone through an audio module, and the like. For example, the shooting device may display a prompt message "please change the lens" through the display interface, and after seeing the prompt message, the user may change the lens according to the content of the prompt message. And when the user replaces the lens and/or the shooting mode according to the prompt information, the shooting device re-executes the steps of determining the pixel reading coefficient according to the set image mode and judging whether the pixel reading coefficient meets the condition corresponding to the frequency characteristic parameter setting so as to determine whether the replaced lens and/or the shooting mode meets the shooting requirement.
Optionally, if the pixel readout coefficient does not meet the condition set by the corresponding frequency characteristic parameter, the pixel readout coefficient may be further adjusted. According to analysis, the factors influencing the exposure and the read-out rate of the image sensor are mainly as follows: an operation clock of the image sensor, an analog/digital conversion rate, an image data amount (including the total number of lines and the total number of pixels included in each line), and a read-out rate of each line, and the like. Among them, the operation clock of the image sensor affects the power consumption, and is generally constant. For the analog/digital conversion module, the number of the analog/digital conversion modules is generally guaranteed to be consistent with the total number of pixels in each row, so the number is also generally constant. The read-out rate per row will have an effect and is therefore also generally constant. In summary, the present embodiment proposes that the pixel readout coefficient can be adjusted by modifying the amount of image data.
Optionally, the image sensor described in this embodiment may support setting of the content such as the total number of lines, the generation manner of each line, the total number of pixels of each line, and the generation manner of each pixel corresponding to the shooting mode. Accordingly, the sensor dynamically combines a new model to meet the specific requirements of the user. In a possible implementation manner, if the pixel readout coefficient does not meet the condition set corresponding to the frequency characteristic parameter, the step of adjusting the pixel readout coefficient includes:
determining that the pixel readout coefficient is less than the lesser of a first ratio and a second ratio, the first ratio being the ratio of the normalized digital filter frequency to the peak frequency, according to the set condition; the second ratio is a ratio of a normalized digital filter frequency to the MTF optical frequency.
Wherein, since the set condition is known, then the pixel readout coefficients are adjusted such that the pixel readout coefficients meet the set condition to avoid peak shift problems. As described in the embodiment shown in fig. 3, the range of values of the pixel readout coefficients can be determined according to the following formula:
Y<min(0.5/X1,0.5/X3)
then, when adjusting the pixel readout coefficients, the pixel readout coefficients can be adjusted while satisfying the above-described value range of the pixel readout coefficients. For example, if it is determined that the value range of the pixel readout coefficient is Y <1, and if the current pixel readout coefficient is equal to or greater than 1, the pixel readout coefficient may be adjusted so that the value Y of the pixel readout coefficient is less than 1. The closer the value Y of the pixel readout coefficient is to the upper limit of the value range, the higher the image frame rate is, but the lower the resolution of the image is. The value of the adjusted pixel readout coefficient may be determined as appropriate. For example, when Y <1, Y may be 1/2, i.e., the image sensor is controlled to expand one charge sensed by the photosensitive unit to 2 pixel readout. Alternatively, when Y <1, Y may be 1/4, that is, the image sensor is controlled to expand one charge sensed by the photosensitive unit to 4 pixel readout. Compared with Y-1/2, taking Y-1/4 can improve the resolution of the image to adapt to different application scenarios.
Optionally, the pixel readout coefficients are read from a register connected to the image sensor. After the photographing device issues prompt information for prompting the lens replacement and/or prompting the photographing mode replacement, the following steps can be further performed:
controlling the image sensor to acquire an adjusted pixel readout coefficient from the register, wherein the register is used for storing the adjusted pixel readout coefficient under the condition of adjusting the pixel readout coefficient, and controlling the image sensor to output a pixel according to the adjusted pixel readout coefficient;
or, controlling the image sensor to acquire the pixel readout coefficient from the register, wherein the register is used for storing the pixel readout coefficient and controlling the image sensor to output the pixel according to the pixel readout coefficient under the condition of replacing the lens and/or replacing the shooting mode.
Wherein, after adjusting the pixel readout coefficients, the register may store the adjusted pixel readout coefficients. For example, the originally stored pixel readout coefficients of the register may be a set { YY ═ 1}, and the adjusted pixel readout coefficients Y <1, the pixel readout coefficients stored in the register may include { YY <1 }.
The embodiment of the application provides a configuration method of a shooting device, wherein the shooting device comprises an image sensor, and the image sensor comprises a plurality of photosensitive units. The shooting device determines a pixel reading coefficient according to a set image mode, wherein the pixel reading coefficient is used for identifying the number of photosensitive units for reading a single pixel value in an image. And acquiring the frequency characteristic parameters of the lens carried by the shooting device. Judging whether the pixel reading coefficient meets the condition set corresponding to the frequency characteristic parameter or not; if yes, configuring the shooting device according to the pixel reading coefficient; and if not, sending prompt information for prompting to replace the lens and/or prompting to replace the shooting mode. By adopting the method, the shooting device can improve the quality of the shot image under the condition of supporting the currently adopted shooting mode. If the current lens and/or shooting mode cannot meet the shooting requirement, the lens and/or shooting mode can be replaced so as to avoid peak value deviation.
The embodiment of the invention provides a configuration device of a shooting device, which is used for executing corresponding steps in a configuration method of the shooting device. Referring to fig. 6, the configuration device of the photographing device includes a memory 601 and a processor 602; the memory 601 is used for storing program codes; the processor 602 invokes program code that, when executed, performs the following:
determining a pixel reading coefficient according to the set image mode of the shooting device, wherein the pixel reading coefficient is used for identifying the number of photosensitive units with single pixel values in a read image;
acquiring frequency characteristic parameters of a lens carried by the shooting device;
judging whether the pixel reading coefficient meets the condition set corresponding to the frequency characteristic parameter or not;
and if so, configuring the shooting device according to the pixel reading coefficient.
In one embodiment, the frequency characteristic parameters of the lens include: a peak frequency that causes the lens to shift in phase by a maximum amount;
the set condition is set according to the peak frequency of the lens, an MTF optical frequency determined based on a nyquist frequency of the camera pixel, and a normalized digital filter frequency of the camera.
In one embodiment, the set condition is:
the pixel readout coefficient is smaller than the smaller of the first ratio and the second ratio;
the first ratio is a ratio of the normalized digital filter frequency to the peak frequency;
the second ratio is a ratio of a normalized digital filter frequency to the MTF optical frequency.
In one embodiment, the nyquist frequency is determined according to the size of the light sensing unit.
In one embodiment, the normalized digital filter has a frequency of 0.5.
In one embodiment, the MTF optical frequency is 1/4 of the nyquist frequency.
In one embodiment, the processor 602 is further configured to:
and if the pixel reading coefficient does not meet the set condition, sending prompt information for prompting to replace the lens and/or prompting to replace the shooting mode.
In one embodiment, the video mode includes a video recording mode and/or an auto focus mode.
In one embodiment, the pixel readout coefficients are read from a register coupled to the image sensor.
In one embodiment, the register stores a plurality of pixel readout coefficients corresponding to each image mode, and the image mode corresponds to a plurality of pixel readout coefficients; the processor 602 is further configured to:
and controlling the image sensor to acquire the pixel readout coefficient from the register.
The configuration device of the shooting device provided by the embodiment of the application can determine the pixel reading coefficient according to the set image mode, wherein the pixel reading coefficient is used for identifying the number of the photosensitive units for reading a single pixel value in an image. And acquiring the frequency characteristic parameters of the lens carried by the shooting device. Judging whether the pixel reading coefficient meets the condition set corresponding to the frequency characteristic parameter or not; and if so, configuring the shooting device according to the pixel reading coefficient. By adopting the device, the quality of the shot image can be improved under the condition of supporting the currently adopted shooting mode.
An embodiment of the present application further provides a computer-readable storage medium, where a computer program is stored, and when the computer program is executed by a processor, the computer program implements the related functions described in the embodiments corresponding to fig. 3 and 5, which are not described herein again.
The computer readable storage medium may be an internal storage unit of the device according to any of the foregoing embodiments, for example, a hard disk or a memory of the device. The computer readable storage medium may also be an external storage device of the device, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), etc. provided on the device. Further, the computer-readable storage medium may also include both an internal storage unit and an external storage device of the apparatus. The computer-readable storage medium is used for storing the computer program and other programs and data required by the terminal. The computer readable storage medium may also be used to temporarily store data that has been output or is to be output.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present application and is not to be construed as limiting the scope of the present application, so that the present application is not limited thereto, and all equivalent variations and modifications can be made to the present application.
Claims (23)
1. A configuration method of a shooting device is characterized in that an image sensor of the shooting device comprises a plurality of photosensitive units; the method comprises the following steps:
determining a pixel reading coefficient according to the set image mode of the shooting device, wherein the pixel reading coefficient is used for identifying the number of photosensitive units with single pixel values in a read image;
acquiring frequency characteristic parameters of a lens carried by the shooting device;
judging whether the pixel reading coefficient meets the condition set corresponding to the frequency characteristic parameter or not;
and if so, configuring the shooting device according to the pixel reading coefficient.
2. The method of claim 1, wherein the frequency characteristic parameters of the lens comprise: a peak frequency that causes the lens to shift in phase by a maximum amount;
the set condition is set according to the peak frequency of the lens, an MTF optical frequency determined based on a nyquist frequency of the camera pixel, and a normalized digital filter frequency of the camera.
3. The method according to claim 2, characterized in that the set conditions are:
the pixel readout coefficient is smaller than the smaller of the first ratio and the second ratio;
the first ratio is a ratio of the normalized digital filter frequency to the peak frequency;
the second ratio is a ratio of a normalized digital filter frequency to the MTF optical frequency.
4. A method as claimed in claim 2 or 3, characterized in that the nyquist frequency is determined in dependence on the size of the light-sensitive cells.
5. A method according to claim 2 or 3, characterized in that the frequency of the normalized digital filter is 0.5.
6. A method as claimed in claim 2 or 3 wherein the MTF optical frequency is 1/4 of the nyquist frequency.
7. The method according to any one of claims 1-6, further comprising:
and if the pixel reading coefficient does not meet the set condition, sending prompt information for prompting to replace the lens and/or prompting to replace the shooting mode.
8. The method of any one of claims 1-6, wherein the video mode comprises a video recording mode and/or an auto focus mode.
9. The method of any of claims 1-6, wherein the pixel readout coefficients are read from a register coupled to the image sensor.
10. The method of claim 9, wherein the register stores a plurality of pixel readout coefficients for each image mode, the each image mode corresponding to a plurality of pixel readout coefficients;
the determining of the pixel readout coefficient according to the set image mode includes:
and controlling the image sensor to acquire the pixel readout coefficient from the register.
11. A configuration device of a shooting device is characterized by comprising a memory and a processor;
the memory is used for storing program codes;
the processor, calling the program code, when the program code is executed, is configured to:
determining a pixel reading coefficient according to the set image mode of the shooting device, wherein the pixel reading coefficient is used for identifying the number of photosensitive units with single pixel values in a read image;
acquiring frequency characteristic parameters of a lens carried by the shooting device;
judging whether the pixel reading coefficient meets the condition set corresponding to the frequency characteristic parameter or not;
and if so, configuring the shooting device according to the pixel reading coefficient.
12. The apparatus of claim 11, wherein the frequency characteristic parameters of the lens comprise: a peak frequency that causes the lens to shift in phase by a maximum amount;
the set condition is set according to the peak frequency of the lens, an MTF optical frequency determined based on a nyquist frequency of the camera pixel, and a normalized digital filter frequency of the camera.
13. The apparatus according to claim 12, wherein the set condition is:
the pixel readout coefficient is smaller than the smaller of the first ratio and the second ratio;
the first ratio is a ratio of the normalized digital filter frequency to the peak frequency;
the second ratio is a ratio of a normalized digital filter frequency to the MTF optical frequency.
14. The apparatus of claim 12 or 13, wherein the nyquist frequency is determined according to a size of the light sensing unit.
15. The apparatus of claim 12 or 13, wherein the normalized digital filter has a frequency of 0.5.
16. The apparatus of claim 12 or 13, wherein the MTF optical frequency is 1/4 of the nyquist frequency.
17. The apparatus according to any of claims 11-16, wherein the processor is further configured to:
and if the pixel reading coefficient does not meet the set condition, sending prompt information for prompting to replace the lens and/or prompting to replace the shooting mode.
18. The apparatus according to any one of claims 11-16, wherein the video mode comprises a video recording mode and/or an auto focus mode.
19. The apparatus of any of claims 11-16, wherein the pixel readout coefficients are read from a register coupled to the image sensor.
20. The apparatus of claim 19, the register storing a plurality of pixel readout coefficients for each image mode, the each image mode corresponding to a plurality of pixel readout coefficients; the processor is further configured to:
and controlling the image sensor to acquire the pixel readout coefficient from the register.
21. A camera, comprising:
a camera for capturing an image;
an image sensor including a plurality of light sensing units; the image sensor is for performing the method of any one of claims 1-10.
22. The camera of claim 21, wherein the camera further comprises a register; the register is used for storing the pixel readout coefficient.
23. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program comprising program instructions that, when executed by a processor, cause the processor to carry out the method according to any one of claims 1-10.
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| PCT/CN2019/121833 WO2021102878A1 (en) | 2019-11-29 | 2019-11-29 | Method and device for configuring photographing device |
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