CN117191357A - Performance evaluation method and system of optical lens - Google Patents
Performance evaluation method and system of optical lens Download PDFInfo
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Abstract
The invention discloses a performance evaluation method and a system of an optical lens, which relate to the technical field of computer application, wherein the method comprises the following steps: generating an analog signal by a direct digital frequency synthesizer; acquiring the preset gyroscope by the field editable gate array according to the analog signal to obtain an analog signal data set; analyzing and generating a jitter signal; obtaining a shaking image set and obtaining a shaking image sequence through a projector; processing the dithering signal and the dithering image sequence through a preset time sequence synchronization scheme to obtain a synchronization processing result; anti-shake shooting is carried out on the target optical lens through the synchronous processing result, anti-shake shooting data are obtained, and the image compression ratio is calculated; and performing performance evaluation on the target optical lens. The problems of long performance evaluation time and damage of evaluation process equipment in the prior art for evaluating the lens performance are solved. The intelligent degree of the detection of the shake performance of the optical lens is improved, and the aims of improving the performance evaluation efficiency and accuracy of the optical lens are fulfilled.
Description
Technical Field
The present invention relates to the field of computer application technologies, and in particular, to a performance evaluation method and system for an optical lens.
Background
In the process of shooting by using various shooting devices, human bodies can unconsciously shake, and the influence of natural factors such as wind, ground vibration and the like further causes blurring of a shooting image, namely 'shake blurring'. Therefore, in evaluating the performance of an optical lens, detecting the anti-shake performance thereof is an important evaluation reference on the one hand. In the prior art, image stabilization and anti-shake are performed through electronic anti-shake and optical anti-shake technologies, wherein the electronic image stabilization technology mainly processes and restores images through digital image processing, and the anti-shake effect is poor; the optical image stabilization technology processes the dithering by means of the dithering signals of hardware, and the anti-dithering effect is good. When the anti-shake test is carried out on the optical lens by the optical image stabilization technology in the prior art, shake of the optical lens is usually simulated by virtue of a vibrating table, and then performance of the lens is evaluated after analysis, so that the problems of long performance evaluation time and easiness in damage of evaluation process equipment exist, and the application value of the performance evaluation scheme in actual engineering is further influenced. The intelligent nondestructive anti-shake detection of the optical lens by using the computer technology is studied, and the method has important significance for improving the performance evaluation efficiency and accuracy of the optical lens.
However, in the prior art, vibration of an optical lens is simulated by means of a vibration table, and then performance of the lens is evaluated after analysis, so that the problems of long performance evaluation time and easiness in damage of evaluation process equipment exist, and finally practical engineering application value is affected.
Disclosure of Invention
The invention aims to provide a performance evaluation method and system of an optical lens, which are used for solving the problems that in the prior art, vibration of the optical lens is simulated by means of a vibration table, the performance of the lens is evaluated after analysis, the performance evaluation time is long, and evaluation process equipment is easy to damage, and finally the practical engineering application value is influenced.
In view of the above, the present invention provides a performance evaluation method and system for an optical lens.
In a first aspect, the present invention provides a performance evaluation method of an optical lens, the method being implemented by a performance evaluation system of an optical lens, wherein the method includes: generating an analog signal through a direct digital frequency synthesizer, wherein the analog signal is a shaking analog signal of a preset gyroscope; according to the analog signals, the field editable gate array performs data acquisition on the preset gyroscope to obtain an analog signal data set; analyzing the analog signal data set, and generating a jitter signal according to an analysis result; obtaining a shaking image set, and storing the shaking image set to a projector to obtain a shaking image sequence; synchronizing the dithering signal and the dithering image sequence through a preset time sequence synchronization scheme to obtain a synchronization processing result; performing anti-shake shooting on the target optical lens through the synchronous processing result to obtain anti-shake shooting data, and calculating the anti-shake shooting data to obtain an image compression ratio; and performing performance evaluation on the target optical lens based on the image compression ratio.
In a second aspect, the present invention further provides a performance evaluation system of an optical lens, for performing the performance evaluation method of an optical lens according to the first aspect, wherein the system includes: the first generation module is used for generating an analog signal through a direct digital frequency synthesizer, wherein the analog signal is a shaking analog signal of a preset gyroscope; the first obtaining module is used for acquiring data of the preset gyroscope according to the analog signal and the field editable gate array to obtain an analog signal data set; the second generation module is used for analyzing the analog signal data set and generating a jitter signal according to an analysis result; the second obtaining module is used for obtaining a dithering image set and storing the dithering image set to a projector to obtain a dithering image sequence; the third obtaining module is used for carrying out synchronous processing on the dithering signals and the dithering image sequences through a preset time sequence synchronous scheme to obtain a synchronous processing result; the first execution module is used for carrying out anti-shake shooting on the target optical lens through the synchronous processing result to obtain anti-shake shooting data, and calculating the anti-shake shooting data to obtain an image compression ratio; and the second execution module is used for evaluating the performance of the target optical lens based on the image compression ratio.
One or more technical schemes provided by the invention have at least the following technical effects or advantages:
generating an analog signal through a direct digital frequency synthesizer, wherein the analog signal is a shaking analog signal of a preset gyroscope; according to the analog signals, the field editable gate array performs data acquisition on the preset gyroscope to obtain an analog signal data set; analyzing the analog signal data set, and generating a jitter signal according to an analysis result; obtaining a shaking image set, and storing the shaking image set to a projector to obtain a shaking image sequence; synchronizing the dithering signal and the dithering image sequence through a preset time sequence synchronization scheme to obtain a synchronization processing result; performing anti-shake shooting on the target optical lens through the synchronous processing result to obtain anti-shake shooting data, and calculating the anti-shake shooting data to obtain an image compression ratio; and performing performance evaluation on the target optical lens based on the image compression ratio. The intelligent degree of the detection of the shake performance of the optical lens is improved, the technical targets of improving the performance evaluation efficiency and the evaluation accuracy of the optical lens are realized through the nondestructive performance evaluation of the optical lens based on the computer technology, and the method has good practical engineering application value.
The foregoing description is only an overview of the present invention, and is intended to be implemented in accordance with the teachings of the present invention in order that the same may be more clearly understood and to make the same and other objects, features and advantages of the present invention more readily apparent.
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In order to more clearly illustrate the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described below, it being obvious that the drawings in the description below are only exemplary and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a method for evaluating performance of an optical lens according to the present invention;
FIG. 2 is a schematic flow chart of obtaining the analog signal data set in the performance evaluation method of the optical lens of the present invention;
FIG. 3 is a schematic flow chart of the plurality of iterative transformed images forming the dithered image set in the performance evaluation method of an optical lens according to the present invention;
FIG. 4 is a schematic flow chart of the image compression ratio calculated in the performance evaluation method of the optical lens of the present invention;
fig. 5 is a schematic structural diagram of a performance evaluation system of an optical lens according to the present invention.
Reference numerals illustrate:
the device comprises a first generating module M100, a first obtaining module M200, a second generating module M300, a second obtaining module M400, a third obtaining module M500, a first executing module M600 and a second executing module M700.
Detailed Description
The invention solves the problems that the performance of the optical lens is estimated after analysis by simulating the shake of the optical lens by the vibrating table in the prior art, the performance estimation time is long, and the estimation process equipment is easy to be damaged, and finally the practical engineering application value is influenced. The intelligent degree of the detection of the shake performance of the optical lens is improved, the technical targets of improving the performance evaluation efficiency and the evaluation accuracy of the optical lens are realized through the nondestructive performance evaluation of the optical lens based on the computer technology, and the method has good practical engineering application value.
The technical scheme of the invention obtains, stores, uses, processes and the like the data, which all meet the relevant regulations of national laws and regulations.
In the following, the technical solutions of the present invention will be clearly and completely described with reference to the accompanying drawings, and it should be understood that the described embodiments are only some embodiments of the present invention, but not all embodiments of the present invention, and that the present invention is not limited by the exemplary embodiments described herein. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention. It should be further noted that, for convenience of description, only some, but not all of the drawings related to the present invention are shown.
Example 1
Referring to fig. 1, the present invention provides a performance evaluation method of an optical lens, wherein the method is applied to a performance evaluation system of an optical lens, the performance evaluation method is applied to a performance evaluation system, the performance evaluation system is communicatively connected with a direct digital frequency synthesizer, a projector, and a field editable gate array, and the performance evaluation method specifically includes the following steps:
step S100: generating an analog signal through the direct digital frequency synthesizer, wherein the analog signal is a shaking analog signal of a preset gyroscope;
specifically, the performance evaluation method of the optical lens is applied to a performance evaluation system of the optical lens, shake signals and image sequences can be respectively simulated in an anti-shake test process of the optical lens by utilizing computer science and technology, further anti-shake evaluation of a target optical lens is carried out by combining time sequence synchronous triggering, finally performance evaluation of the target optical lens is carried out based on an anti-shake test result, the degree of intellectualization of performance evaluation of the optical lens is improved, evaluation efficiency is improved, and meanwhile nondestructive effect of evaluation of the optical lens is guaranteed. The target optical lens refers to any optical lens needing intelligent evaluation of lens performance by using a performance evaluation system. The performance evaluation system is in communication connection with a direct digital frequency synthesizer, and after the direct digital frequency synthesizer intelligently generates an analog signal of a preset gyroscope, the generated analog signal is automatically transmitted to the performance evaluation system. The preset gyroscope is used for generating a shaking signal so as to activate an anti-shaking motor of the optical lens, and the preset gyroscope is used for simulating the gyroscope signal. For example, a preset gyroscope is placed on a vibrating table, the vibrating table is started to generate vibration with a certain frequency, gyroscope data under the vibration are collected, and analog signals are obtained after analysis and processing. By generating the analog signal, the technical objective of providing a basis for a subsequent analog dither signal is achieved.
Step S200: according to the analog signals, the field editable gate array performs data acquisition on the preset gyroscope to obtain an analog signal data set;
further, as shown in fig. 2, step S200 of the present invention further includes:
step S210: obtaining a preset sampling scheme, wherein the preset sampling scheme comprises a first preset sampling frequency and a preset sampling time;
step S220: based on the first preset sampling frequency and the preset sampling time, the field programmable gate array performs data acquisition on the preset gyroscope to obtain a first sampling data set;
step S230: the first sampling data set comprises first triaxial angular velocity data and first triaxial angular acceleration data of the preset gyroscope;
step S240: obtaining a preset extraction scheme, and extracting the first sampling data set based on the preset extraction scheme to obtain the analog signal data set.
Specifically, the field editable gate array is used as a main device of the performance evaluation system and used for intelligently collecting data information of the preset gyroscope under the vibration action of the vibration table. That is, according to the analog signal, the field programmable gate array performs data acquisition on the preset gyroscope to obtain an analog signal data set.
Before the field-editable gate array performs data acquisition, a preset sampling scheme is firstly obtained, wherein the preset sampling scheme comprises a first preset sampling frequency and a preset sampling time. The first preset sampling frequency refers to a frequency when the field editable door array performs data sampling, and the preset sampling time refers to a data acquisition duration preset and stored in the performance evaluation system based on actual requirements and simulation conditions. An exemplary field programmable gate array samples the three-axis angular velocity and the three-axis angular acceleration of the preset gyroscope at 10kHz for 3 to 5 seconds, for example, and transmits the sampled results to the system side. And then, based on the first preset sampling frequency and the preset sampling time, the field editable gate array performs data acquisition on the preset gyroscope to obtain a first sampling data set. The first sampling data set comprises first triaxial angular velocity data and first triaxial angular acceleration data of the preset gyroscope. Exemplary is as defined the X-axis is horizontal and pointing to the right of the lens device, the Y-axis is vertical and pointing directly above the lens device, and the Z-axis is vertical to the lens device outward. When the lens equipment swings left and right (rotates around the y axis), a variable rolling angle range is (-90 degrees, 90 degrees is obtained, when the lens equipment swings back and forth (rotates around the x axis), a variable angle range is (-90 degrees, 90 degrees is obtained, and when the transverse screen of the lens equipment is converted into a vertical screen or the vertical screen is converted into a transverse screen (rotates around the z axis), a variable yaw angle y range is (-90 degrees, 90 degrees is obtained. Finally, a preset extraction scheme is obtained, and the first sampling data set is extracted based on the preset extraction scheme, so that the analog signal data set is obtained. The preset extraction scheme is to extract necessary data according to actual needs after a large amount of signal data is acquired and then recombine the necessary data into an analog signal data set. Exemplary analog signal data for 5 consecutive vibration cycles are extracted from the acquired data, for example, for analysis. By obtaining an analog signal data set, the technical objective of providing a data basis for the subsequent generation of a wobble signal is achieved.
Step S300: analyzing the analog signal data set, and generating a jitter signal according to an analysis result;
further, the step S300 of the present invention further includes:
step S310: obtaining a second preset sampling frequency;
step S320: based on the second preset sampling frequency and the preset sampling time, the field programmable gate array performs data acquisition on the preset gyroscope to obtain a second sampling data set;
step S330: the second sampling data set comprises second triaxial angular velocity data and second triaxial angular acceleration data of the preset gyroscope;
step S340: and comparing and analyzing the analog signal data set and the second sampling data set to obtain the jitter signal.
Specifically, after the analog signal data set is acquired through the field editable gate array, the performance evaluation system analyzes the analog signal data set and generates a jitter signal according to an analysis result. Firstly, a second preset sampling frequency is obtained, wherein the second preset sampling frequency refers to the frequency of the field programmable gate array when the field programmable gate array performs data acquisition on the preset gyroscope in a static state. Then, based on the second preset sampling frequency and the preset sampling time, the field editable gate array performs data acquisition on the preset gyroscope to obtain a second sampling data set; the second sampling data set comprises second triaxial angular velocity data and second triaxial angular acceleration data of the preset gyroscope. And finally, comparing and analyzing the analog signal data set with the second sampling data set, namely comparing the analog signal data in the vibration state and the static state, so as to obtain the jitter signal.
Step S400: obtaining a dithering image set, and storing the dithering image set to the projector to obtain a dithering image sequence;
further, as shown in fig. 3, step S400 of the present invention further includes:
step S410: obtaining a preset original image;
step S420: constructing a set of transform factors, wherein the set of transform factors comprises a plurality of transform factors;
step S430: obtaining a preset iterative transformation scheme;
step S440: combining the preset iterative transformation scheme with the plurality of transformation factors, and performing iterative transformation on the preset original image to obtain a plurality of iterative transformation images;
step S450: the plurality of iteratively transformed images form the dithered image set.
Specifically, before obtaining the jittering image sequence, a preset original image is first obtained, wherein the preset original image refers to an initial image to be simulated by the jittering image sequence, and the initial image is any image file which is randomly acquired or downloaded based on a network, and a scenery map is downloaded from the network as an exemplary initial image. The set of transformation factors comprising a plurality of transformation factors is then constructed by analytically setting different translation directions, different translation amounts, and different rotation centers, different rotation angles, etc. And further analyzing and setting the preset iterative conversion scheme in advance. Exemplary is a cyclic iterative transformation after each of the transformation silver in the transformation factor set is ordered. And finally, combining the preset iterative transformation scheme with the plurality of transformation factors, performing iterative transformation on the preset original image to obtain a plurality of iterative transformation images, and forming the dithering image set according to the plurality of iterative transformation images. The method is realized by simulating the jittering image, and provides a foundation for simulating the jittering test of the optical lens.
Step S500: synchronizing the dithering signal and the dithering image sequence through a preset time sequence synchronization scheme to obtain a synchronization processing result;
further, the step S500 of the present invention further includes:
step S510: calculating the number of images in the jittery image sequence;
step S520: according to the number of images and the first preset sampling frequency, calculating to obtain a trigger signal frequency, wherein the calculation formula of the trigger signal frequency is as follows:
step S530: wherein the saidRefers to the trigger signal frequency, said +.>Refers to the number of images, theRefers to the first preset sampling frequency;
step S540: and obtaining a synchronous trigger signal according to the trigger signal frequency, and storing the synchronous trigger signal into the preset time sequence synchronization scheme.
In particular, since the dither signal is simulated separately from the dithered image set, a synchronization signal is required to synchronize the two in time in order to better simulate a real situation. That is, the synchronization processing is performed on the dithering signal and the dithering image sequence through a preset timing synchronization scheme, so as to obtain a synchronization processing result. The preset time sequence synchronization scheme comprises trigger signal frequency.
Firstly, calculating the number of images in the jittering image sequence, and then calculating to obtain a trigger signal frequency according to the number of images and the first preset sampling frequency, wherein the trigger signal frequency has the following calculation formula:
wherein the saidRefers to the trigger signal frequency, said +.>Refers to the number of images, said +.>Refers to the first preset sampling frequency. And finally, obtaining a synchronous trigger signal according to the trigger signal frequency, and storing the synchronous trigger signal into the preset time sequence synchronous scheme.
Step S600: performing anti-shake shooting on the target optical lens through the synchronous processing result to obtain anti-shake shooting data, and calculating the anti-shake shooting data to obtain an image compression ratio;
further, as shown in fig. 4, step S600 of the present invention further includes:
step S610: obtaining a preset shooting scheme, wherein the preset shooting scheme comprises a first shooting scheme and a second shooting scheme;
step S620: shooting by using the target optical lens based on the first shooting scheme and the second shooting scheme in sequence to obtain a first shooting image and a second shooting image;
step S630: obtaining a preset image range, and sequentially extracting a first range of the first shooting image and a second range of the second shooting image based on the preset image range;
step S640: and calculating the image compression ratio according to the preset image range, the first range and the second range.
Further, step S640 of the present invention further includes:
step S641: according to the preset image range, the first range and the second range, the image compression ratio is calculated, wherein the calculation formula of the image compression ratio is as follows:
；
step S642: wherein the saidRefers to the image compression ratio, said +.>Refers to the image compression factor, said +.>Means said first range, said +.>Means said second range, said +.>Refers to the preset image range.
Step S700: and performing performance evaluation on the target optical lens based on the image compression ratio.
Specifically, anti-shake shooting is performed on the target optical lens through the synchronization processing result to obtain anti-shake shooting data, and the anti-shake shooting data is calculated to obtain an image compression ratio. Specifically, the synchronization process sends out a synchronization trigger signal by starting the anti-shake function, so that the shake signal and the image sequence are synchronized. Wherein the image compression ratio is used for evaluating the anti-shake effect of the target optical lens.
Firstly, a preset shooting scheme is obtained, wherein the preset shooting scheme comprises a first shooting scheme and a second shooting scheme. The first shooting scheme refers to an optical lens anti-shake test scheme after an anti-shake function is started. The second photographing scheme refers to an optical lens anti-shake test scheme without starting an anti-shake function. And then, shooting by using the target optical lens based on the first shooting scheme and the second shooting scheme in sequence to obtain a first shooting image and a second shooting image. That is, the first photographed image is an image photographed by the target optical lens after the anti-shake function is turned on, and the second photographed image is an image photographed by the target optical lens when the anti-shake function is not turned on. Further, comprehensively analyzing and presetting an image range, namely the preset image range. Then, a first range of the first photographed image and a second range of the second photographed image are sequentially extracted based on the preset image range, that is, the preset image ranges in the first photographed image and the second photographed image are respectively obtained. And finally, calculating the image compression ratio according to the preset image range, the first range and the second range. The calculation formula of the image compression ratio is as follows:
；
wherein the saidRefers to the image compression ratio, said +.>Refers to the image compression factor, said +.>Means said first range, said +.>Means said second range, said +.>Refers to the preset image range. After the image compression ratio is calculated, the performance evaluation system performs performance evaluation on the target optical lens based on the image compression ratio. Wherein, the larger the image compression ratio is, the better the debounce effect is, and the higher the corresponding target optical performance evaluation grade is. Through the nondestructive performance evaluation of the optical lens based on the computer technology, the technical aim of improving the performance evaluation efficiency and the evaluation accuracy of the optical lens is fulfilled.
In summary, the performance evaluation method of the optical lens provided by the invention has the following technical effects:
generating an analog signal through a direct digital frequency synthesizer, wherein the analog signal is a shaking analog signal of a preset gyroscope; according to the analog signals, the field editable gate array performs data acquisition on the preset gyroscope to obtain an analog signal data set; analyzing the analog signal data set, and generating a jitter signal according to an analysis result; obtaining a shaking image set, and storing the shaking image set to a projector to obtain a shaking image sequence; synchronizing the dithering signal and the dithering image sequence through a preset time sequence synchronization scheme to obtain a synchronization processing result; performing anti-shake shooting on the target optical lens through the synchronous processing result to obtain anti-shake shooting data, and calculating the anti-shake shooting data to obtain an image compression ratio; and performing performance evaluation on the target optical lens based on the image compression ratio. The intelligent degree of the detection of the shake performance of the optical lens is improved, the technical targets of improving the performance evaluation efficiency and the evaluation accuracy of the optical lens are realized through the nondestructive performance evaluation of the optical lens based on the computer technology, and the method has good practical engineering application value.
Example two
Based on the same inventive concept as the performance evaluation method of an optical lens in the foregoing embodiment, the present invention further provides a performance evaluation system of an optical lens, referring to fig. 5, the system includes:
the first generation module M100 is configured to generate an analog signal through a direct digital frequency synthesizer, where the analog signal is a jittery analog signal of a preset gyroscope;
the first obtaining module M200 is used for carrying out data acquisition on the preset gyroscope by the field editable gate array according to the analog signals to obtain an analog signal data set;
the second generation module M300 is used for analyzing the analog signal data set and generating a jitter signal according to an analysis result;
the second obtaining module M400 is used for obtaining a dithering image set, and storing the dithering image set to a projector to obtain a dithering image sequence;
the third obtaining module M500 is configured to perform synchronization processing on the dithering signal and the dithering image sequence through a preset timing synchronization scheme, so as to obtain a synchronization processing result;
the first execution module M600 is used for carrying out anti-shake shooting on the target optical lens according to the synchronous processing result to obtain anti-shake shooting data, and calculating the anti-shake shooting data to obtain an image compression ratio;
and the second execution module M700 is used for performing performance evaluation on the target optical lens based on the image compression ratio.
Further, the first obtaining module M200 in the system is further configured to:
obtaining a preset sampling scheme, wherein the preset sampling scheme comprises a first preset sampling frequency and a preset sampling time;
based on the first preset sampling frequency and the preset sampling time, the field programmable gate array performs data acquisition on the preset gyroscope to obtain a first sampling data set;
the first sampling data set comprises first triaxial angular velocity data and first triaxial angular acceleration data of the preset gyroscope;
obtaining a preset extraction scheme, and extracting the first sampling data set based on the preset extraction scheme to obtain the analog signal data set.
Further, the second generating module M300 in the system is further configured to:
obtaining a second preset sampling frequency;
based on the second preset sampling frequency and the preset sampling time, the field programmable gate array performs data acquisition on the preset gyroscope to obtain a second sampling data set;
the second sampling data set comprises second triaxial angular velocity data and second triaxial angular acceleration data of the preset gyroscope;
and comparing and analyzing the analog signal data set and the second sampling data set to obtain the jitter signal.
Further, the second obtaining module M400 in the system is further configured to:
obtaining a preset original image;
constructing a set of transform factors, wherein the set of transform factors comprises a plurality of transform factors;
obtaining a preset iterative transformation scheme;
combining the preset iterative transformation scheme with the plurality of transformation factors, and performing iterative transformation on the preset original image to obtain a plurality of iterative transformation images;
the plurality of iteratively transformed images form the dithered image set.
Further, the third obtaining module M500 in the system is further configured to:
calculating the number of images in the jittery image sequence;
according to the number of images and the first preset sampling frequency, calculating to obtain a trigger signal frequency, wherein the calculation formula of the trigger signal frequency is as follows:
wherein the saidRefers to the trigger signal frequency, said +.>Refers to the number of images, said +.>Refers to the first preset sampling frequency;
and obtaining a synchronous trigger signal according to the trigger signal frequency, and storing the synchronous trigger signal into the preset time sequence synchronization scheme.
Further, the first execution module M600 in the system is further configured to:
obtaining a preset shooting scheme, wherein the preset shooting scheme comprises a first shooting scheme and a second shooting scheme;
shooting by using the target optical lens based on the first shooting scheme and the second shooting scheme in sequence to obtain a first shooting image and a second shooting image;
obtaining a preset image range, and sequentially extracting a first range of the first shooting image and a second range of the second shooting image based on the preset image range;
and calculating the image compression ratio according to the preset image range, the first range and the second range.
Further, the first execution module M600 in the system is further configured to:
according to the preset image range, the first range and the second range, the image compression ratio is calculated, wherein the calculation formula of the image compression ratio is as follows:
；
wherein the saidRefers to the image compression ratio, said +.>Refers to the image compression factor, said +.>Means said first range, said +.>Means said second range, said +.>Refers to the preset image range.
The embodiments of the present invention are described in a progressive manner, and each embodiment focuses on the difference from the other embodiments, and the performance evaluation method and specific example of an optical lens in the first embodiment of fig. 1 are equally applicable to the performance evaluation system of an optical lens in the present embodiment, and by the foregoing detailed description of the performance evaluation method of an optical lens, those skilled in the art can clearly understand the performance evaluation system of an optical lens in the present embodiment, so that the description is omitted herein for brevity. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the present invention and the equivalent techniques thereof, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A method of performance evaluation of an optical lens, the method being applied to a performance evaluation system communicatively coupled to a direct digital frequency synthesizer, a projector, a field editable gate array, the method comprising:
generating an analog signal through the direct digital frequency synthesizer, wherein the analog signal is a shaking analog signal of a preset gyroscope;
according to the analog signals, the field editable gate array performs data acquisition on the preset gyroscope to obtain an analog signal data set;
analyzing the analog signal data set, and generating a jitter signal according to an analysis result;
obtaining a dithering image set, and storing the dithering image set to the projector to obtain a dithering image sequence;
synchronizing the dithering signal and the dithering image sequence through a preset time sequence synchronization scheme to obtain a synchronization processing result;
performing anti-shake shooting on the target optical lens through the synchronous processing result to obtain anti-shake shooting data, and calculating the anti-shake shooting data to obtain an image compression ratio;
and performing performance evaluation on the target optical lens based on the image compression ratio.
2. The performance evaluation method according to claim 1, wherein the performing data acquisition on the preset gyroscope by the field programmable gate array according to the analog signal to obtain an analog signal data set includes:
obtaining a preset sampling scheme, wherein the preset sampling scheme comprises a first preset sampling frequency and a preset sampling time;
based on the first preset sampling frequency and the preset sampling time, the field programmable gate array performs data acquisition on the preset gyroscope to obtain a first sampling data set;
the first sampling data set comprises first triaxial angular velocity data and first triaxial angular acceleration data of the preset gyroscope;
obtaining a preset extraction scheme, and extracting the first sampling data set based on the preset extraction scheme to obtain the analog signal data set.
3. The performance evaluation method according to claim 2, wherein analyzing the analog signal data set and generating a dither signal according to the analysis result comprises:
obtaining a second preset sampling frequency;
based on the second preset sampling frequency and the preset sampling time, the field programmable gate array performs data acquisition on the preset gyroscope to obtain a second sampling data set;
the second sampling data set comprises second triaxial angular velocity data and second triaxial angular acceleration data of the preset gyroscope;
and comparing and analyzing the analog signal data set and the second sampling data set to obtain the jitter signal.
4. The performance evaluation method according to claim 1, further comprising, before the obtaining the dithered image set and saving the dithered image set to the projector, obtaining a dithered image sequence:
obtaining a preset original image;
constructing a set of transform factors, wherein the set of transform factors comprises a plurality of transform factors;
obtaining a preset iterative transformation scheme;
combining the preset iterative transformation scheme with the plurality of transformation factors, and performing iterative transformation on the preset original image to obtain a plurality of iterative transformation images;
the plurality of iteratively transformed images form the dithered image set.
5. The performance evaluation method according to claim 2, further comprising, before the synchronizing the dither signal with the dither image sequence by a preset timing synchronization scheme, a synchronization processing result:
calculating the number of images in the jittery image sequence;
according to the number of images and the first preset sampling frequency, calculating to obtain a trigger signal frequency, wherein the calculation formula of the trigger signal frequency is as follows:
；
wherein the saidRefers to the trigger signal frequency, said +.>Refers to the number of images, said +.>Refers to the first preset sampling frequency;
and obtaining a synchronous trigger signal according to the trigger signal frequency, and storing the synchronous trigger signal into the preset time sequence synchronization scheme.
6. The performance evaluation method according to claim 1, wherein the performing anti-shake shooting on the target optical lens by the synchronization processing result to obtain anti-shake shooting data, and calculating the anti-shake shooting data to obtain an image compression ratio, comprises:
obtaining a preset shooting scheme, wherein the preset shooting scheme comprises a first shooting scheme and a second shooting scheme;
shooting by using the target optical lens based on the first shooting scheme and the second shooting scheme in sequence to obtain a first shooting image and a second shooting image;
obtaining a preset image range, and sequentially extracting a first range of the first shooting image and a second range of the second shooting image based on the preset image range;
and calculating the image compression ratio according to the preset image range, the first range and the second range.
7. The performance evaluation method according to claim 6, wherein the calculating the image compression ratio according to the preset image range, the first range, and the second range includes:
according to the preset image range, the first range and the second range, the image compression ratio is calculated, wherein the calculation formula of the image compression ratio is as follows:
；
wherein the saidRefers to the image compression ratio, said +.>Refers to the image compression factor, said +.>Means said first range, said +.>Means said second range, said +.>Refers to the preset image range.
8. A performance evaluation system of an optical lens, the performance evaluation system comprising:
the first generation module is used for generating an analog signal through a direct digital frequency synthesizer, wherein the analog signal is a shaking analog signal of a preset gyroscope;
the first obtaining module is used for acquiring data of the preset gyroscope according to the analog signal and the field editable gate array to obtain an analog signal data set;
the second generation module is used for analyzing the analog signal data set and generating a jitter signal according to an analysis result;
the second obtaining module is used for obtaining a dithering image set and storing the dithering image set to a projector to obtain a dithering image sequence;
the third obtaining module is used for carrying out synchronous processing on the dithering signals and the dithering image sequences through a preset time sequence synchronous scheme to obtain a synchronous processing result;
the first execution module is used for carrying out anti-shake shooting on the target optical lens through the synchronous processing result to obtain anti-shake shooting data, and calculating the anti-shake shooting data to obtain an image compression ratio;
and the second execution module is used for evaluating the performance of the target optical lens based on the image compression ratio.
9. The performance evaluation system of claim 8, wherein the first obtaining module specifically comprises:
obtaining a preset sampling scheme, wherein the preset sampling scheme comprises a first preset sampling frequency and a preset sampling time;
based on the first preset sampling frequency and the preset sampling time, the field programmable gate array performs data acquisition on the preset gyroscope to obtain a first sampling data set;
the first sampling data set comprises first triaxial angular velocity data and first triaxial angular acceleration data of the preset gyroscope;
obtaining a preset extraction scheme, and extracting the first sampling data set based on the preset extraction scheme to obtain the analog signal data set.
10. The performance evaluation system of claim 9, wherein the first execution module specifically comprises:
obtaining a preset shooting scheme, wherein the preset shooting scheme comprises a first shooting scheme and a second shooting scheme;
shooting by using the target optical lens based on the first shooting scheme and the second shooting scheme in sequence to obtain a first shooting image and a second shooting image;
obtaining a preset image range, and sequentially extracting a first range of the first shooting image and a second range of the second shooting image based on the preset image range;
and calculating the image compression ratio according to the preset image range, the first range and the second range.
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