CN105203302A - Resolution detecting method and resolution detecting device - Google Patents
Resolution detecting method and resolution detecting device Download PDFInfo
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- CN105203302A CN105203302A CN201510585976.4A CN201510585976A CN105203302A CN 105203302 A CN105203302 A CN 105203302A CN 201510585976 A CN201510585976 A CN 201510585976A CN 105203302 A CN105203302 A CN 105203302A
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Abstract
The invention discloses a resolution detecting method and a resolution detecting device. The resolution detecting method comprises the steps of obtaining a detection image draft picked up by an image pickup module, detecting an oblique side nearby an original detection point in the picked-up detection image draft, determining a new detection point on the detected oblique side and calculating spatial frequency response based on the new detection point so as to detect the resolution of the image pickup module.
Description
Technical field
The present invention relates to camera technical field, more specifically, relating to a kind of method for detecting resolving power and resolving power pick-up unit.
Background technology
In this day and age, the photoelectronic imaging instrument such as digital camera, mobile phone camera, industry and medical endoscope has been widely applied among the life of people.The test of photoelectronic imaging instrument and Performance Detection have become very important in design with in producing.
In the prior art, in order to detect the resolving power (or resolution) of photographing module (or CCM, CMOS photographing module), a kind of mode extensively adopted is edge-detection mode.Specifically, based on the view data (captured detection picture proof) by being obtained by photographing module shot detection picture proof, obtain monochrome information or edge contour (EdgeProfile).Monochrome information or edge contour are processed (differential process), to produce its linear evolution equation or linear spectral frequency (LSF, LinearSpectralFrequency).By conversion process (such as, Fast Fourier Transform (FFT)), linear evolution equation or linear spectral frequency are changed to frequency field from transform of spatial domain, produce spatial frequency response SFR (SpatialFrequencyResponse).Based on spatial frequency response, produce modulation transfer function corresponding to each frequency (ModulationTransferFunction) mark, thus detect the resolving power of photographing module, that is, by determining whether MTF mark exceedes the resolving power that predetermined value passes judgment on photographing module.Usual MTF refers to the ratio of the contrast of output image and the contrast of input picture.
Fig. 2 schematically shows the example detecting resolving power.In fig. 2, two captured image A and B have been shown in (I).In (II), obtain the edge contour of two images.In (III), obtain the linear spectral frequency of two images.In (IV), obtain the spatial frequency response of two images.As shown in (IV), when MTF is 25%, the spatial frequency of image A and B is f respectively
aand f
b.
In order to detect, need to use and detecting picture proof.Fig. 3 shows normally used one in prior art and detects picture proof.
In actual production process, because production line operation speed is very fast, therefore, deviation can be produced when photographing module shot detection picture proof.Fig. 4 shows the situation producing deviation.In the diagram, original detection picture proof is 302.Due to shooting deviation, the region captured by photographing module is dotted line frame 301.Like this, the pattern indicated by circle 303 is not photographed.In the diagram, the measuring point original to be checked in dotted line frame 301 is 304.But due to deviation, the actual point that should detect should be 305.Therefore, due to this deviation, larger metrical error may be produced in actual production process.
Summary of the invention
An object of the present invention is to provide a kind of new solution for detecting resolving power.
According to a first aspect of the invention, providing a kind of method for detecting resolving power, comprising: obtain the detection picture proof taken by photographing module; In captured detection picture proof, near former measuring point to be checked, detect hypotenuse; Detected hypotenuse determines new check point; And based on new check point, computer memory frequency response, for detecting the resolving power of described photographing module.
Preferably, according to spatial frequency response, produce the modulation transfer function mark that each frequency is corresponding, to detect the resolving power of described photographing module.
Preferably, based on new check point, determine the zoning of computer memory frequency response, and according to zoning, computer memory frequency response.
Preferably, in the pattern of captured detection picture proof, the plagioclase bar of different colours is by alternate layout, and the hypotenuse detected is the hypotenuse of the plagioclase bar near former measuring point to be checked.
Preferably, the hypotenuse detected is the hypotenuse of the plagioclase bar closest to former measuring point to be checked.
Preferably, in the pattern of captured detection picture proof, the oblique grid of different colours is by alternate layout, and the hypotenuse detected is the hypotenuse of the oblique grid near former measuring point to be checked.
Preferably, the hypotenuse detected is the hypotenuse of the oblique grid closest to former measuring point to be checked.
Preferably, measurement range is set near former measuring point to be checked.Preferably, the hypotenuse in measurement range is determined multiple new check point.Preferably, based on described multiple new check point, multiple spatial frequency response is calculated.Preferably, based on multiple spatial frequency response, obtain result space frequency response, thus detect the resolving power of described photographing module.
According to a second aspect of the invention, provide a kind of resolving power pick-up unit, comprising: acquiring unit, be configured to obtain the detection picture proof taken by photographing module; Edge-detection unit, is provided in captured detection picture proof, near former measuring point to be checked, detects hypotenuse; Check point determining unit, is provided on detected hypotenuse and determines new check point; And computing unit, be configured to based on new check point, computer memory frequency response, for detecting the resolving power of described photographing module.
Preferably, described computing unit is also configured to according to spatial frequency response, produces the modulation transfer function mark that each frequency is corresponding, to detect the resolving power of described photographing module.
Preferably, described computing unit is also configured to, based on new check point, determine the zoning of computer memory frequency response, and according to zoning, computer memory frequency response.
Preferably, in the pattern of captured detection picture proof, the plagioclase bar of different colours is by alternate layout, and the hypotenuse detected is the hypotenuse of the plagioclase bar near former measuring point to be checked.
Preferably, the hypotenuse detected is the hypotenuse of the plagioclase bar closest to former measuring point to be checked.
Preferably, in the pattern of captured detection picture proof, the oblique grid of different colours is by alternate layout, and the hypotenuse detected is the hypotenuse of the oblique grid near former measuring point to be checked.
Preferably, the hypotenuse detected is the hypotenuse of the oblique grid closest to former measuring point to be checked.
Preferably, edge-detection unit is also provided near former measuring point to be checked and arranges measurement range, and determines hypotenuse in measurement range.Preferably, described check point determining unit is also provided on hypotenuse and determines multiple new check point.Preferably, described computing unit is also configured to, based on described multiple new check point, calculate multiple spatial frequency response, and based on multiple spatial frequency response, obtain result space frequency response, thus detect the resolving power of described photographing module.
The present inventor has found the deviation produced when detecting resolving power in prior art, and it is next for this problem to propose a kind of new technical scheme.Therefore, the technical assignment that the present invention will realize or technical matters to be solved are that those skilled in the art never expect or do not anticipate, therefore the present invention is a kind of new technical scheme.
By referring to the detailed description of accompanying drawing to exemplary embodiment of the present invention, further feature of the present invention and advantage thereof will become clear.
Accompanying drawing explanation
In the description combined and the accompanying drawing forming a part for instructions shows embodiments of the invention, and illustrate that one is used from and explains principle of the present invention together with it.
Fig. 1 is the block diagram of the example of the hardware configuration of the computing system showing the embodiment that can be used in the present invention.
Fig. 2 shows an example for detecting resolving power of prior art.
Fig. 3 shows the detection picture proof of prior art.
Fig. 4 shows in prior art the example that metrical error occurs.
Fig. 5 shows the process flow diagram of the method for detecting resolving power according to an embodiment of the invention.
Fig. 6 shows resolving power pick-up unit according to an embodiment of the invention.
Fig. 7 shows according to an example for detecting resolving power of the present invention.
Fig. 8 shows according to another example for detecting resolving power of the present invention.
Fig. 9 shows according to another example for detecting resolving power of the present invention.
Embodiment
Various exemplary embodiment of the present invention is described in detail now with reference to accompanying drawing.It should be noted that: unless specifically stated otherwise, otherwise positioned opposite, the numerical expression of the parts of setting forth in these embodiments and step and numerical value do not limit the scope of the invention.
Illustrative to the description only actually of at least one exemplary embodiment below, never as any restriction to the present invention and application or use.
May not discuss in detail for the known technology of person of ordinary skill in the relevant, method and apparatus, but in the appropriate case, described technology, method and apparatus should be regarded as a part for instructions.
In all examples with discussing shown here, any occurrence should be construed as merely exemplary, instead of as restriction.Therefore, other example of exemplary embodiment can have different values.
It should be noted that: represent similar terms in similar label and letter accompanying drawing below, therefore, once be defined in an a certain Xiang Yi accompanying drawing, then do not need to be further discussed it in accompanying drawing subsequently.
< hardware configuration >
Fig. 1 is the block diagram of the example of the hardware configuration of the computing system 1000 showing the embodiment that can be used in the present invention.
As shown in Figure 1, computing system comprises calculation element 1110.Calculation element 1110 comprises the processing unit 1120, system storage 1130, non-dismountable non-volatile memory interface 1140, removable non-volatile memory interface 1150, user's input interface 1160, network interface 1170, video interface 1190 and the output Peripheral Interface 1195 that are connected by system bus 1121.
System storage 1130 comprises ROM (ROM (read-only memory)) 1131 and RAM (random access memory) 1132.BIOS (Basic Input or Output System (BIOS)) 1133 resides in ROM1131.Operating system 1134, application program 1135, other program module 1136 and some routine datas 1137 reside in RAM1132.
The non-dismountable nonvolatile memory 1141 of such as hard disk is connected with non-dismountable non-volatile memory interface 1140.Such as, non-dismountable nonvolatile memory 1141 can store operating system 1144, application program 1145, other program module 1146 and some routine datas 1147.
Such as floppy disk 1151 is connected with removable non-volatile memory interface 1150 with the removable non-volatile storer of CD-ROM drive 1155.Such as, floppy disk can be inserted in floppy disk 1151, and CD (CD) can be inserted in CD-ROM drive 1155.
Such as mouse 1161 is connected with user's input interface 1160 with the input equipment of keyboard 1162.
Calculation element 1110 is connected with remote computing device 1180 by network interface 1170.Such as, network interface 1170 is connected with remote computing device 1180 by LAN 1171.As an alternative, network interface 1170 can be connected with modulator-demodular unit (modulator-demodulator) 1172, and modulator-demodular unit 1172 is connected with remote computing device 1180 by Wide Area Network 1173.
Remote computing device 1180 can comprise the storer 1181 of the such as hard disk storing remote application 1185.
Video interface 1190 is connected with monitor 1191.
Export Peripheral Interface 1195 to be connected with printer 1196 and loudspeaker 1197.
Computing system shown in Fig. 1 is only indicative, and anything but in order to will invention, its application, or uses be limited.
Technical scheme of the present invention can be realized by the computing system shown in Fig. 1.Alternatively, technical scheme of the present invention can also be realized by other devices.
< embodiment >
Fig. 1 shows the process flow diagram of the method for detecting resolving power according to an embodiment of the invention.As shown in Figure 1, in step S2100, obtain the detection picture proof taken by photographing module.
Such as, can photographing module shot detection picture proof be passed through, the detection picture proof captured by acquisition, and send it to computing system shown in Fig. 1, for subsequent treatment.
In step S2200, in captured detection picture proof, near former measuring point to be checked, detect hypotenuse.
In step S2300, detected hypotenuse determines new check point.
In one example in which, in the pattern of captured detection picture proof, the plagioclase bar of different colours is by alternate layout, and the hypotenuse detected is the hypotenuse of the plagioclase bar near former measuring point to be checked.Such as, the hypotenuse detected can be the hypotenuse of the plagioclase bar closest to former measuring point to be checked.In this example, relative to prior art, more check point can be obtained, thus obtain more photographing module resolving power information.In addition, the position skew detecting picture proof can be considered.
In another example, in the pattern of captured detection picture proof, the oblique grid of different colours is by alternate layout, and the hypotenuse detected is the hypotenuse of the oblique grid near former measuring point to be checked.Such as, the hypotenuse detected can be the hypotenuse of the oblique grid near former measuring point to be checked.In this example, owing to adopting oblique grid, therefore, more check point can be obtained.
In step S2400, based on new check point, computer memory frequency response, for detecting the resolving power of described photographing module.
Such as, based on new check point, the zoning of computer memory frequency response can be determined, and according to zoning, computer memory frequency response.
Such as, according to spatial frequency response, the modulation transfer function mark that each frequency is corresponding can be produced, to detect the resolving power of described photographing module.
Alternatively, such as, in step S2200, measurement range can be set near former measuring point to be checked.Hypotenuse can detected in measurement range.Such as, in the pattern of captured detection picture proof, the oblique grid of different colours is by alternate layout.Like this, in step S2300, detected hypotenuse is determined multiple new check point.Then, in step S2400, based on described multiple new check point, calculate multiple spatial frequency response, based on multiple spatial frequency response, obtain result space frequency response, thus detect the resolving power of described photographing module.Such as, based on the mean value of multiple spatial frequency response, result space frequency response can be obtained.In this way, the impact of disturbing factor can be reduced, therefore, test result more accurately can be obtained.
In the prior art, need dollying module, to be centrally located in the center detecting picture proof.But, by technical scheme of the present invention, this positioning action can be omitted.
Fig. 6 shows according to resolving power pick-up unit 3000 of the present invention.Resolving power pick-up unit 3000 comprises acquiring unit 3100, edge-detection unit 3200, check point determining unit 3300 and computing unit 3400.
It will be appreciated by those skilled in the art that, the unit in resolving power pick-up unit can be realized by various mode.Such as, described unit can be realized by instruction configuration processor.Such as, instruction can be stored in ROM, and when starting the device, instruction be read programming device from ROM and realizes described unit.Such as, described unit can be cured in dedicated devices (such as ASIC).Described unit separate unit can be divided into, or they realization can be combined.Described unit can be realized by the one in above-mentioned various implementation, or can be realized by the combination of two or more modes in above-mentioned various implementation.
Acquiring unit 3100 is configured to obtain the detection picture proof taken by photographing module.
Edge-detection unit 3200 is provided in captured detection picture proof, near former measuring point to be checked, detect hypotenuse.
Check point determining unit 3300 is provided on detected hypotenuse determines new check point.
In one example in which, in the pattern of captured detection picture proof, the plagioclase bar of different colours is by alternate layout, and the hypotenuse detected is the hypotenuse of the plagioclase bar near former measuring point to be checked.Such as, the hypotenuse detected can be the hypotenuse of the plagioclase bar closest to former measuring point to be checked.
In another example, in the pattern of captured detection picture proof, the oblique grid of different colours is by alternate layout, and the hypotenuse detected is the hypotenuse of the oblique grid near former measuring point to be checked.Such as, the hypotenuse detected can be the hypotenuse of the oblique grid near former measuring point to be checked.
Computing unit 3400 is configured to based on new check point, computer memory frequency response, for detecting the resolving power of described photographing module.
Such as, described computing unit 3400, according to spatial frequency response, produces the modulation transfer function mark that each frequency is corresponding, to detect the resolving power of described photographing module.
Such as, described computing unit is also configured to, based on new check point, determine the zoning of computer memory frequency response, and according to zoning, computer memory frequency response.
Alternatively, such as, edge-detection unit 2200 is provided near former measuring point to be checked and arranges measurement range, and determines hypotenuse in measurement range.Such as, in the pattern of captured detection picture proof, the oblique grid of different colours is by alternate layout.Described check point determining unit 2300 is provided on hypotenuse determines multiple new check point.Described computing unit 2400 is configured to, based on described multiple new check point, calculate multiple spatial frequency response, and based on multiple spatial frequency response, obtain result space frequency response, thus detect the resolving power of described photographing module.
< first example >
Fig. 7 shows according to an example for detecting resolving power of the present invention.
As shown in Figure 7, the detection picture proof 401 taken by photographing module is oblique candy strip.Measuring point to be checked in the middle of detection picture proof 401.Arrow in Fig. 7 indicates the zoomed-in view in measuring point region to be checked.In zoomed-in view, 402 represent former measuring point to be checked.Hypotenuse is detected near measuring point 402 to be checked.Such as, the hypotenuse detected is the hypotenuse in closest approach 402.New check point 403 is positioned on detected hypotenuse.Around new check point 403, determine zoning 404, with computer memory frequency response, thus detect the resolving power of described photographing module.
< second example >
Fig. 8 shows according to another example for detecting resolving power of the present invention.
As shown in Figure 8, the detection picture proof 501 taken by photographing module is oblique grid pattern.Measuring point to be checked in the middle of detection picture proof 501.Arrow in Fig. 8 indicates the zoomed-in view in measuring point region to be checked.In zoomed-in view, 502 represent former measuring point to be checked.Hypotenuse is detected near measuring point 502 to be checked.Such as, the hypotenuse detected is the hypotenuse in closest approach 502.New check point 503 is positioned on detected hypotenuse.Around new check point 503, determine zoning, with computer memory frequency response, thus detect the resolving power of described photographing module.
< the 3rd example >
Fig. 9 shows according to another example for detecting resolving power of the present invention.
As shown in Figure 9, the detection picture proof 601 taken by photographing module is oblique grid pattern.Measuring point to be checked in the middle of detection picture proof 601.Arrow in Fig. 9 indicates the zoomed-in view in measuring point region to be checked.In zoomed-in view, 602 represent former measuring point to be checked.Near measuring point 602 to be checked, measurement range 609 is set.Multiple hypotenuse is detected in measurement range 609.Detected hypotenuse is determined multiple new check point 603,604,605,606,607,608.Around described multiple new check point 603,604,605,606,607,608, determine zoning respectively, with computer memory frequency response, thus detect the resolving power of described photographing module.
Of the present invention can be device, method, and they can show as computer program.From this aspect, computer program also can covered in protection scope of the present invention.Computer program can comprise computer-readable recording medium, containing the computer-readable program instructions for making processor realize various aspects of the present invention.
Computer-readable recording medium can be the tangible device that can keep and store the instruction used by instruction actuating equipment.Computer-readable recording medium can be such as the combination of--but being not limited to--storage device electric, magnetic storage apparatus, light storage device, electromagnetism memory device, semiconductor memory apparatus or above-mentioned any appropriate.The example more specifically (non exhaustive list) of computer-readable recording medium comprises: portable computer diskette, hard disk, random access memory (RAM), ROM (read-only memory) (ROM), erasable type programmable read only memory (EPROM or flash memory), static RAM (SRAM), Portable compressed dish ROM (read-only memory) (CD-ROM), digital versatile disc (DVD), memory stick, floppy disk, mechanical coding equipment, such as it stores punch card or the groove internal projection structure of instruction, and the combination of above-mentioned any appropriate.Here used computer-readable recording medium is not interpreted as momentary signal itself, the electromagnetic wave of such as radiowave or other Free propagations, the electromagnetic wave (such as, by the light pulse of fiber optic cables) propagated by waveguide or other transmission mediums or the electric signal by wire transfer.
Computer-readable program instructions as described herein can download to each calculating/treatment facility from computer-readable recording medium, or downloads to outer computer or External memory equipment by network, such as the Internet, LAN (Local Area Network), wide area network and/or wireless network.Network can comprise copper transmission cable, Optical Fiber Transmission, wireless transmission, router, fire wall, switch, gateway computer and/or Edge Server.Adapter in each calculating/treatment facility or network interface from network reception computer-readable program instructions, and forward this computer-readable program instructions, in the computer-readable recording medium be stored in each calculating/treatment facility.
The source code that the computer program instructions of the present invention's operation can be assembly instruction for performing, instruction set architecture (ISA) instruction, machine instruction, machine-dependent instructions, microcode, firmware instructions, condition setup data or the combination in any with one or more programming languages are write or object code, described programming language comprises OO programming language-such as Smalltalk, C++ etc., and the procedural programming languages of routine-such as " C " language or similar programming language.Computer-readable program instructions can fully perform on the user computer, partly perform on the user computer, as one, independently software package performs, partly part performs on the remote computer or performs on remote computer or server completely on the user computer.In the situation relating to remote computer, remote computer can by the network of any kind-comprise LAN (Local Area Network) (LAN) or wide area network (WAN)-be connected to subscriber computer, or, outer computer (such as utilizing ISP to pass through Internet connection) can be connected to.In certain embodiments, personalized customization electronic circuit is carried out by utilizing the status information of computer-readable program instructions, such as Programmable Logic Device, field programmable gate array (FPGA) or programmable logic array (PLA), this electronic circuit can perform computer-readable program instructions, thus realizes various aspects of the present invention.
Here with reference to describing various aspects of the present invention according to the method for the embodiment of the present invention, the process flow diagram of device (containing computer program) and/or block diagram.Should be appreciated that the combination of each square frame in each square frame of process flow diagram and/or block diagram and process flow diagram and/or block diagram, can be realized by computer-readable program instructions.
These computer-readable program instructions can be supplied to the processor of multi-purpose computer, special purpose computer or other programmable data treating apparatus, thus produce a kind of machine, make these instructions when the processor by computing machine or other programmable data treating apparatus performs, create the device of the function/action specified in the one or more square frames in realization flow figure and/or block diagram.Also these computer-readable program instructions can be stored in a computer-readable storage medium, these instructions make computing machine, programmable data treating apparatus and/or other equipment work in a specific way, thus, the computer-readable medium storing instruction then comprises a manufacture, and it comprises the instruction of the various aspects of the function/action specified in the one or more square frames in realization flow figure and/or block diagram.
Also can computer-readable program instructions be loaded on computing machine, other programmable data treating apparatus or miscellaneous equipment, make to perform sequence of operations step on computing machine, other programmable data treating apparatus or miscellaneous equipment, to produce computer implemented process, thus make function/action of specifying in the one or more square frames in the instruction realization flow figure that performs on computing machine, other programmable data treating apparatus or miscellaneous equipment and/or block diagram.
Process flow diagram in accompanying drawing and block diagram show device according to multiple embodiment of the present invention, the architectural framework in the cards of method (containing computer program), function and operation.In this, each square frame in process flow diagram or block diagram can represent a part for a module, program segment or instruction, and a part for described module, program segment or instruction comprises one or more executable instruction for realizing the logic function specified.At some as in the realization of replacing, the function marked in square frame also can be different from occurring in sequence of marking in accompanying drawing.Such as, in fact two continuous print square frames can perform substantially concurrently, and they also can perform by contrary order sometimes, and this determines according to involved function.Also it should be noted that, the combination of the square frame in each square frame in block diagram and/or process flow diagram and block diagram and/or process flow diagram, can realize by the special hardware based system of the function put rules into practice or action, or can realize with the combination of specialized hardware and computer instruction.Be well known that to those skilled in the art, realize by hardware mode, realized by software mode and realize being all of equal value by the mode that software and hardware combines.
Be described above various embodiments of the present invention, above-mentioned explanation is exemplary, and non-exclusive, and be also not limited to disclosed each embodiment.When not departing from the scope and spirit of illustrated each embodiment, many modifications and changes are all apparent for those skilled in the art.The selection of term used herein, is intended to explain best the principle of each embodiment, practical application or the technological improvement to the technology in market, or makes other those of ordinary skill of the art can understand each embodiment disclosed herein.Scope of the present invention is limited by claims.
Claims (16)
1., for detecting a method for resolving power, comprising:
Obtain the detection picture proof taken by photographing module;
In captured detection picture proof, near former measuring point to be checked, detect hypotenuse;
Detected hypotenuse determines new check point; And
Based on new check point, computer memory frequency response, for detecting the resolving power of described photographing module.
2. method according to claim 1, wherein, according to spatial frequency response, produces the modulation transfer function mark that each frequency is corresponding, to detect the resolving power of described photographing module.
3. method according to claim 1, wherein, based on new check point, determines the zoning of computer memory frequency response, and according to zoning, computer memory frequency response.
4. method according to claim 1, wherein, in the pattern of captured detection picture proof, the plagioclase bar of different colours is by alternate layout, and the hypotenuse detected is the hypotenuse of the plagioclase bar near former measuring point to be checked.
5. method according to claim 4, wherein, the hypotenuse detected is the hypotenuse of the plagioclase bar closest to former measuring point to be checked.
6. method according to claim 1, wherein, in the pattern of captured detection picture proof, the oblique grid of different colours is by alternate layout, and the hypotenuse detected is the hypotenuse of the oblique grid near former measuring point to be checked.
7. method according to claim 6, wherein, the hypotenuse detected is the hypotenuse of the oblique grid closest to former measuring point to be checked.
8. method according to claim 6, wherein, arranges measurement range near former measuring point to be checked,
Wherein, the hypotenuse in measurement range is determined multiple new check point,
Wherein, based on described multiple new check point, calculate multiple spatial frequency response,
Wherein, based on multiple spatial frequency response, obtain result space frequency response, thus detect the resolving power of described photographing module.
9. a resolving power pick-up unit, comprising:
Acquiring unit, is configured to obtain the detection picture proof taken by photographing module;
Edge-detection unit, is provided in captured detection picture proof, near former measuring point to be checked, detects hypotenuse;
Check point determining unit, is provided on detected hypotenuse and determines new check point; And
Computing unit, is configured to based on new check point, computer memory frequency response, for detecting the resolving power of described photographing module.
10. device according to claim 9, wherein, described computing unit is also configured to according to spatial frequency response, produces the modulation transfer function mark that each frequency is corresponding, to detect the resolving power of described photographing module.
11. devices according to claim 9, wherein, described computing unit is also configured to, based on new check point, determine the zoning of computer memory frequency response, and according to zoning, computer memory frequency response.
12. devices according to claim 9, wherein, in the pattern of captured detection picture proof, the plagioclase bar of different colours is by alternate layout, and the hypotenuse detected is the hypotenuse of the plagioclase bar near former measuring point to be checked.
13. devices according to claim 12, wherein, the hypotenuse detected is the hypotenuse of the plagioclase bar closest to former measuring point to be checked.
14. devices according to claim 9, wherein, in the pattern of captured detection picture proof, the oblique grid of different colours is by alternate layout, and the hypotenuse detected is the hypotenuse of the oblique grid near former measuring point to be checked.
15. devices according to claim 14, wherein, the hypotenuse detected is the hypotenuse of the oblique grid closest to former measuring point to be checked.
16. devices according to claim 14, wherein, edge-detection unit is also provided near former measuring point to be checked and arranges measurement range, and determines hypotenuse in measurement range,
Wherein, described check point determining unit is also provided on hypotenuse determines multiple new check point,
Wherein, described computing unit is also configured to, based on described multiple new check point, calculate multiple spatial frequency response, and based on multiple spatial frequency response, obtain result space frequency response, thus detect the resolving power of described photographing module.
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| CN106596060A (en) * | 2016-11-24 | 2017-04-26 | 歌尔股份有限公司 | Parallel test device and resolution power test method |
| CN106791818A (en) * | 2016-12-27 | 2017-05-31 | 歌尔股份有限公司 | Test the method and the equipment for the test of camera resolving power of camera resolving power |
| CN107389319A (en) * | 2017-08-03 | 2017-11-24 | 豪威半导体（上海）有限责任公司 | Module group lens method of testing and system |
| CN107525651A (en) * | 2016-06-22 | 2017-12-29 | 北京疯景科技有限公司 | Camera lens resolving power method of testing, apparatus and system |
| CN110579935A (en) * | 2017-08-08 | 2019-12-17 | 广东弘景光电科技股份有限公司 | Method and system for generating test target corresponding to camera module to be tested |
| CN111524153A (en) * | 2020-06-29 | 2020-08-11 | 昆山丘钛微电子科技有限公司 | Image analysis force determination method and device and computer storage medium |
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