CN110572638A - Anti-shake effect testing method and device, electronic equipment and medium - Google Patents
Anti-shake effect testing method and device, electronic equipment and medium Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N17/00—Diagnosis, testing or measuring for television systems or their details
- H04N17/002—Diagnosis, testing or measuring for television systems or their details for television cameras
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/68—Control of cameras or camera modules for stable pick-up of the scene, e.g. compensating for camera body vibrations
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Abstract
The invention discloses an anti-shake effect testing method, an anti-shake effect testing device, electronic equipment and a medium, wherein the method comprises the following steps: in a vibration state, the camera module starts the anti-shake function and shoots and obtains N starting test charts of a test target; n is an integer greater than 1; in a vibration state, the camera module closes the anti-shake function and shoots and obtains M closed test charts of the test target; m is an integer greater than 1; and comparing the imaging position of the test target in the N open test charts with the imaging position of the test target in the M closed test charts to determine the anti-shake effect. The method, the device, the electronic equipment and the medium provided by the invention are used for solving the technical problem that the anti-shake effect of the long exposure test in the prior art is inaccurate, and the technical effect of improving the anti-shake effect test accuracy is realized.
Description
Technical Field
the invention relates to the technical field of camera modules, in particular to an anti-shake effect testing method and device, electronic equipment and a medium.
Background
performance tests are required before the camera module leaves a factory, and an Optical Image Stabilization (OIS) effect test is one of important performance tests.
the current optical anti-shake effect test method in the industry mainly adopts a long exposure detection method, namely, a long exposure is adopted to obtain a test chart in a shake state of a camera module, and the anti-shake effect is evaluated by analyzing the long exposure test chart. However, the analysis accuracy of the test chart can be seriously affected by the problems of 'ghost shadow' and the like caused by long exposure, so that the technical problem of poor test accuracy is caused.
disclosure of Invention
In view of the above problems, the present invention has been made to provide an anti-shake effect test method, apparatus, electronic device, and medium that overcome the above problems or at least partially solve the above problems.
in a first aspect, a method for testing anti-shake effect is provided, including:
In a vibration state, the camera module starts the anti-shake function and shoots and obtains N starting test charts of a test target; n is an integer greater than 1;
in a vibration state, the camera module closes the anti-shake function and shoots and obtains M closed test charts of the test target; m is an integer greater than 1;
And comparing the imaging position of the test target in the N open test charts with the imaging position of the test target in the M closed test charts to determine the anti-shake effect.
optionally, the anti-shake function is opened to the module of making a video recording and N who obtains the test target is opened and is opened the test chart, includes: the camera module starts the anti-shake function and continuously shoots and acquires N starting test charts of a test target at a preset frequency; the module of making a video recording closes the anti-shake function and shoots and obtains M of test target closes the test chart, includes: and the camera module closes the anti-shake function and continuously shoots and acquires M closed test charts of the test target at the preset frequency.
optionally, M is equal to N, and M is greater than or equal to 4.
Optionally, the preset frequency is greater than or equal to 4 times of the vibration frequency of the vibration state.
Optionally, the comparing the imaging position of the test target in the N open-start test charts with the imaging position of the test target in the M close-start test charts to determine the anti-shake effect includes: calculating the opening imaging center position of the test target of each opening test chart in the N opening test charts, and determining the opening movement parameters of the test target in the N opening test charts according to the opening imaging center position; calculating the closed imaging center position of the test target of each closed test chart in the M closed test charts, and determining the closed movement parameters of the test target in the M closed test charts according to the closed imaging center position; and determining the anti-shake effect according to the opening movement parameter and the closing movement parameter.
Optionally, the determining, according to the opening imaging center position, opening movement parameters of the test target in the N opening test charts includes: fitting an opening sine curve according to the opening imaging center position of the N opening test patterns, and taking the amplitude of the opening sine curve as the opening movement parameter; the determining of the closing movement parameters of the test targets in the M closing test charts according to the closing imaging center position includes: and fitting a closing sine curve according to the closing imaging center positions of the M closing test graphs, and taking the amplitude of the closing sine curve as the closing movement parameter.
Optionally, the determining the anti-shake effect according to the opening movement parameter and the closing movement parameter includes: the compression ratio is calculated according to the following formula: compression ratio a × lg (opening movement parameter/closing movement parameter); a is a preset value; and comparing the calculated compression ratio with a preset compression ratio standard, and determining the anti-shake effect according to the comparison result.
in a second aspect, an anti-shake effect testing apparatus is provided, including:
The starting module is used for starting the anti-shake function and shooting and obtaining N starting test charts of the test target in a vibration state; n is an integer greater than 1;
The closing module is used for closing the anti-shake function and shooting and obtaining M closing test charts of the test target in a vibration state by the camera module; m is an integer greater than 1;
And the comparison module is used for comparing the imaging position of the test target in the N open test charts with the imaging position of the test target in the M closed test charts to determine the anti-shake effect.
In a third aspect, an electronic device is provided, which includes a memory, a processor, and a computer program stored on the memory and executable on the processor, and when the processor executes the program, the processor implements the following steps:
in a vibration state, the camera module starts the anti-shake function and shoots and obtains N starting test charts of a test target; n is an integer greater than 1;
In a vibration state, the camera module closes the anti-shake function and shoots and obtains M closed test charts of the test target; m is an integer greater than 1;
And comparing the imaging position of the test target in the N open test charts with the imaging position of the test target in the M closed test charts to determine the anti-shake effect.
in a fourth aspect, there is provided a computer readable storage medium having stored thereon a computer program which when executed by a processor performs the steps of:
In a vibration state, the camera module starts the anti-shake function and shoots and obtains N starting test charts of a test target; n is an integer greater than 1;
In a vibration state, the camera module closes the anti-shake function and shoots and obtains M closed test charts of the test target; m is an integer greater than 1;
And comparing the imaging position of the test target in the N open test charts with the imaging position of the test target in the M closed test charts to determine the anti-shake effect.
The technical scheme provided by the embodiment of the invention at least has the following technical effects or advantages:
according to the anti-shake effect testing method, the anti-shake effect testing device, the electronic equipment and the medium, the camera module respectively shoots and obtains a plurality of test images of the test target before and after the anti-shake function is started in a vibration state, the anti-shake effect is determined by comparing the imaging positions of the test target in the plurality of test images before and after the anti-shake function is started, not only is the inaccuracy caused by the ghost problem of the long exposure detection method effectively avoided, but also the detection accuracy is ensured by comparing the imaging positions of the plurality of images before and after the anti-shake function.
The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
FIG. 1 is a schematic diagram of an anti-shake effect testing system according to an embodiment of the present invention;
FIG. 2 is a flowchart of an anti-shake effect testing method according to an embodiment of the present invention;
FIG. 3 is a diagram illustrating an example of a method for testing anti-shake effect according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of an anti-shake effect testing apparatus according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of an electronic device according to an embodiment of the invention;
FIG. 6 is a schematic structural diagram of a storage medium according to an embodiment of the present invention.
Detailed Description
the technical scheme in the embodiment of the invention has the following general idea:
During vibration, the camera module shoots a plurality of test charts of obtaining the test target respectively under the condition of opening and closing the anti-shake function, and the anti-shake effect is determined by comparing the imaging positions of the test target in the test charts shot under the condition of opening and closing the anti-shake function. The anti-shake effect can be accurately tested only by the test chart obtained in the common shooting mode without adopting a long exposure shooting mode.
It should be noted that the method provided by the present application may be applied to the anti-shake effect testing system shown in fig. 1, as shown in fig. 1, the system includes: the system comprises a test target 1, a camera module 2, a vibration table 3, an image acquisition device 4 and a computing device 5. The test target 1 may be an object, a pattern or a light shadow. The vibration table 3 may be a table or a vibration jig. The image acquisition device 4 can be integrated with the computing device 5, and also can be integrated on the camera module 2, and is used for controlling the camera module 2 to shoot and acquire images. The computing device 5 may be a computer, or may be a computing module integrated on a test production line, which is not limited herein.
exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
Example one
Referring to fig. 2, fig. 2 is a flowchart of an anti-shake effect testing method according to an embodiment of the present invention, including:
Step S201, in a vibration state, starting an anti-shake function by a camera module and shooting N starting test charts of a test target; n is an integer greater than 1;
step S202, in a vibration state, the camera module closes the anti-shake function and shoots and obtains M closed test charts of the test target; m is an integer greater than 1;
Step S203, comparing the imaging positions of the test target in the N open test charts with the imaging positions of the test target in the M closed test charts, and determining the anti-shake effect.
the execution order of step S201 and step S202 is not limited, and step S201 may be executed first, or step S202 may be executed first.
Next, the specific implementation steps of the anti-shake effect testing method provided in this embodiment are described in detail with reference to fig. 2:
Firstly, executing step S201 and step S202, and under the vibration state, starting the anti-shake function by the camera module and shooting and obtaining N starting test charts of a test target; n is an integer greater than 1; in a vibration state, the camera module closes the anti-shake function and shoots and obtains M closed test charts of the test target; m is an integer greater than 1.
in the embodiment of the present application, the vibration mode may be implemented by a vibration platform or a vibration fixture, and preferably, the frequency of the vibration may be set according to the shaking frequency of the human hand, for example, the vibration is performed at the frequency of 6 Hz. Preferably, this application still sets up the vibration frequency when opening the anti-shake function and closes the vibration frequency when anti-shake function the same to guarantee the comparability of follow-up formation of image position, improve the test result accuracy. In addition, the test target in the present application may be a real object, an image, a light spot or a projection, and is not limited herein. Preferably, the test target is set to be a black dot drawn on a white background, so that the imaging accuracy of the test target in subsequent calculation and identification is improved, and the imaging position of the test target is conveniently determined through the circle center of the dot.
in the embodiment of the present application, the anti-shake function may be an optical anti-shake function, or may be other anti-shake functions such as a hardware anti-shake function, which is not limited herein.
In the embodiment of the application, when the anti-shake function is switched off to shoot and the test chart is switched on, the test chart is obtained in a mode of continuously shooting at the same preset frequency, so that the imaging position of a test target in the obtained test chart can represent the change process along with time, the comparability of the imaging position is higher, and the accuracy of the test result is improved. Further, M can be set to be equal to N, and M is more than or equal to 4, so that the sample size of the test pattern is enough and symmetrical when the anti-shake function is started and closed, and the accuracy of subsequent testing is improved.
In the specific implementation process, the preset frequency for continuously shooting and acquiring the test chart is greater than or equal to 4 times of the vibration frequency of the vibration state, so that the test chart can be acquired to represent each vibration position in the vibration process, namely, a plurality of test charts representing the shooting effect of each vibration position can be obtained in one vibration period, the representativeness of the shooting effect of the test chart on the whole vibration state is improved, and the accuracy of a subsequent test result is further ensured.
after obtaining the test chart, step S203 is executed to compare the imaging position of the test target in the N open test charts with the imaging position of the test target in the M closed test charts, and determine the anti-shake effect.
In the specific implementation process, according to different requirements such as the calculated amount and the accuracy, the imaging position of the test target in the open test chart and the imaging position of the test target in the closed test chart are compared, and the anti-shake effect can be determined by various methods, wherein the following two methods are listed as examples:
first, the maximum difference of the imaged positions is compared.
that is, the opening imaging center position of the test target of each opening test chart in the N opening test charts can be calculated, and the opening movement parameter of the test target in the N opening test charts is determined according to the opening imaging center position, where the opening movement parameter is the maximum difference value of the opening imaging center positions in the N opening test charts. And calculating the closed imaging center position of the test target of each of the M closed test charts, and determining the closing movement parameter of the test target of the M closed test charts according to the closed imaging center position, wherein the closing movement parameter is the maximum difference value of the closed imaging center positions of the M closed test charts. And determining the anti-shake effect by comparing the two maximum difference values.
The imaging starting center position is the position where the center of the imaging of the test target in the testing image is started, and the imaging closing center position is the position where the center of the imaging of the test target in the testing image is closed.
The method for comparing the two maximum difference values may be that the two maximum difference values are directly divided to calculate a ratio, the ratio is compared with a preset standard ratio range (determined according to experience or industry standards), if the ratio is within the preset standard ratio range, the anti-shake effect of the camera module is determined to be qualified, otherwise, the anti-shake effect of the camera module is determined to be unqualified.
preferably, the method for setting and comparing the two maximum difference values according to the present application may be to calculate the compression ratio according to a formula "compression ratio a × lg (opening movement parameter/closing movement parameter)", where a is a preset value, and preferably a is 20, so as to obtain the most accurate compression ratio. The opening movement parameter is the maximum difference value of the opening imaging center position, and the closing movement parameter is the maximum difference value of the closing imaging center position. And comparing the calculated compression ratio with a preset compression ratio standard (determined according to experience or industry standard), and determining the anti-shake effect according to the comparison result. Specifically, the compression ratio is calculated by adopting the calculation formula to determine the anti-shake effect, and compared with the method of directly dividing by two maximum difference values to determine the anti-shake effect, the accuracy of the test result can be improved because the empirical preset value a is used as adjustment and the lg function is adopted to highlight the comparison effect.
and secondly, comparing the fitted curves.
That is, the opening imaging center position of the test target of each opening test chart in the N opening test charts can be calculated, and the opening movement parameter of the test target in the N opening test charts is determined according to the opening imaging center position, where the opening movement parameter is an opening sine curve fitted according to the opening imaging center position of the N opening test charts, and the amplitude of the opening sine curve is used as the opening movement parameter. And calculating the closed imaging center position of the test target of each of the M closed test charts, and determining the closed moving parameters of the test target of the M closed test charts according to the closed imaging center position, wherein the closed moving parameters are closed sine curves fitted according to the closed imaging center positions of the M closed test charts, and the amplitude of the closed sine curves is taken as the closed moving parameters. And determining the anti-shake effect by comparing the two amplitudes.
The imaging starting center position is the position where the center of the imaging of the test target in the testing image is started, and the imaging closing center position is the position where the center of the imaging of the test target in the testing image is closed.
The method for comparing the two amplitudes can also be that the ratio is calculated by directly dividing the two amplitudes, then the ratio is compared with a preset standard ratio range (determined according to experience or industry standard), if the ratio is in the preset standard ratio range, the anti-shake effect of the camera module is determined to be qualified, otherwise, the anti-shake effect of the camera module is determined to be unqualified.
Also, preferably, the method for comparing the two amplitudes according to the present disclosure may be to calculate the compression ratio according to the formula "compression ratio a × lg (opening movement parameter/closing movement parameter)", where a is a preset value, and preferably a is 20, so as to obtain the most accurate compression ratio. Where the opening movement parameter is the amplitude of the opening sinusoid and the closing movement parameter is the amplitude of the closing sinusoid. And comparing the calculated compression ratio with a preset compression ratio standard (determined according to experience or industry standard), and determining the anti-shake effect according to the comparison result. Specifically, the compression ratio is calculated by adopting the calculation formula to determine the anti-shake effect, and compared with the method of directly dividing two amplitudes to determine the anti-shake effect, the accuracy of the test result can be improved because the empirical preset value a is used as adjustment and the lg function is adopted to highlight the comparison effect.
specifically, compared with the first method for comparing the maximum difference value, the second method for comparing the amplitude better simulates the moving track of the imaging center in the whole vibration process through curve fitting, so that the complete shooting effect of the vibration process can be represented better, and the corresponding obtained test result is more accurate.
Of course, in the implementation process, the opening movement parameter and the closing movement parameter are not limited to be determined by the closing imaging center position and the opening imaging center position, and may also be determined by the edge or the fixed corner point of the image of the test object in the test chart, which is not limited herein.
For ease of understanding, a test case is provided below in conjunction with fig. 3 and 1:
Preparation work: the dot image is taken as a test object 1 and placed in front of a vibration table 3, a camera module 2 is placed on the vibration table 3, and the vibration table is opened at a fixed frequency of 6 Hz.
In the state of closing the OIS, the image acquisition device 4 controls the camera module 2 to continuously shoot at a frame rate of more than 24fps to obtain a plurality of closing test patterns, calculates the coordinates of the mass centers of dots on each closing test pattern, fits a closing sine curve according to the coordinates of the mass centers of the dots, and takes the difference value between the highest point and the lowest point of the closing sine curve, namely the amplitude as a closing movement parameter.
in the state of opening the OIS, the image acquisition device 4 controls the camera module 2 to continuously shoot at a frame rate of more than 24fps to obtain a plurality of opening test patterns, calculates the coordinates of the mass centers of dots on each opening test pattern, fits an opening sine curve according to the coordinates of the mass centers of the dots, and takes the difference value between the highest point and the lowest point of the opening sine curve, namely the amplitude as an opening movement parameter.
And substituting the closing movement parameter and the opening movement parameter into a formula of 'compression ratio ═ 20 × lg (opening movement parameter/closing movement parameter)' to calculate the compression ratio, and comparing the compression ratio with a preset compression ratio standard, wherein if the calculated compression ratio meets the preset compression ratio standard, the anti-shake effect of the camera module is qualified, and otherwise, the anti-shake effect of the camera module is unqualified.
of course, in the specific implementation process, the closing test chart and the opening test chart may be obtained first, and then the dot centroid coordinate, the curve fitting, the opening movement parameter, and the closing movement parameter are calculated, which is not limited in sequence here.
Based on the same inventive concept, the embodiment of the invention also provides a device corresponding to the method in the first embodiment, which is shown in the second embodiment.
example two
As shown in fig. 4, there is provided an anti-shake effect testing apparatus, including:
the starting module 401 is used for starting the anti-shake function and shooting and obtaining N starting test charts of the test target in the vibration state; n is an integer greater than 1;
A closing module 402, configured to close the anti-shake function and shoot and obtain M closing test charts of the test target in the vibration state; m is an integer greater than 1;
a comparison module 403, configured to compare the imaging position of the test target in the N open test charts with the imaging position of the test target in the M close test charts, and determine an anti-shake effect.
In this embodiment, the anti-shake effect testing apparatus may be a camera module, a computer, a dedicated tester, or a testing apparatus integrated on a production line, which is not limited herein.
Since the apparatus described in the second embodiment of the present invention is an apparatus used for implementing the method of the first embodiment of the present invention, based on the method described in the first embodiment of the present invention, a person skilled in the art can understand the specific structure and the deformation of the apparatus, and thus the details are not described herein. All the devices adopted in the method of the first embodiment of the present invention belong to the protection scope of the present invention.
Based on the same inventive concept, the embodiment of the invention also provides electronic equipment corresponding to the method in the first embodiment, which is shown in the third embodiment.
EXAMPLE III
as shown in fig. 5, the embodiment provides an electronic device, which includes a memory 510, a processor 520, and a computer program 511 stored in the memory 510 and executable on the processor 520, wherein the processor 520 executes the computer program 511 to implement the following steps:
In a vibration state, the camera module starts the anti-shake function and shoots and obtains N starting test charts of a test target; n is an integer greater than 1;
in a vibration state, the camera module closes the anti-shake function and shoots and obtains M closed test charts of the test target; m is an integer greater than 1;
And comparing the imaging position of the test target in the N open test charts with the imaging position of the test target in the M closed test charts to determine the anti-shake effect.
In the embodiment of the present invention, when the processor 520 executes the computer program 511, any one of the embodiments of the present invention may be implemented.
Since the electronic device described in the third embodiment of the present invention is a device used for implementing the method of the first embodiment of the present invention, a person skilled in the art can understand the specific structure and the deformation of the device based on the method described in the first embodiment of the present invention, and thus the details are not described herein. All the devices adopted by the method of the first embodiment of the invention belong to the protection scope of the invention.
based on the same inventive concept, the embodiment of the present invention further provides a storage medium corresponding to the method in the first embodiment, which is shown in the fourth embodiment.
Example four
The present embodiment provides a computer-readable storage medium 600, as shown in fig. 6, on which a computer program 611 is stored, wherein the computer program 611, when executed by a processor, implements the following steps:
in a vibration state, the camera module starts the anti-shake function and shoots and obtains N starting test charts of a test target; n is an integer greater than 1;
in a vibration state, the camera module closes the anti-shake function and shoots and obtains M closed test charts of the test target; m is an integer greater than 1;
And comparing the imaging position of the test target in the N open test charts with the imaging position of the test target in the M closed test charts to determine the anti-shake effect.
in a specific implementation, when the computer program 611 is executed by a processor, any one of the embodiments of the present invention can be implemented.
the technical scheme provided by the embodiment of the invention at least has the following technical effects or advantages:
according to the anti-shake effect testing method, the anti-shake effect testing device, the electronic equipment and the medium, the camera module respectively shoots and obtains a plurality of test images of the test target before and after the anti-shake function is started in a vibration state, the anti-shake effect is determined by comparing the imaging positions of the test target in the plurality of test images before and after the anti-shake function is started, not only is the inaccuracy caused by the ghost problem of the long exposure detection method effectively avoided, but also the detection accuracy is ensured by comparing the imaging positions of the plurality of images before and after the anti-shake function.
the algorithms and displays presented herein are not inherently related to any particular computer, virtual machine, or other apparatus. Various general purpose systems may also be used with the teachings herein. The required structure for constructing such a system will be apparent from the description above. Moreover, the present invention is not directed to any particular programming language. It is appreciated that a variety of programming languages may be used to implement the teachings of the present invention as described herein, and any descriptions of specific languages are provided above to disclose the best mode of the invention.
In the description provided herein, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects. However, the disclosed method should not be interpreted as reflecting an intention that: that the invention as claimed requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this invention.
Those skilled in the art will appreciate that the modules in the device in an embodiment may be adaptively changed and disposed in one or more devices different from the embodiment. The modules or units or components of the embodiments may be combined into one module or unit or component, and furthermore they may be divided into a plurality of sub-modules or sub-units or sub-components. All of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and all of the processes or elements of any method or apparatus so disclosed, may be combined in any combination, except combinations where at least some of such features and/or processes or elements are mutually exclusive. Each feature disclosed in this specification (including any accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.
Furthermore, those skilled in the art will appreciate that while some embodiments herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, in the following claims, any of the claimed embodiments may be used in any combination.
The various component embodiments of the invention may be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof. Those skilled in the art will appreciate that a microprocessor or Digital Signal Processor (DSP) may be used in practice to implement some or all of the functions of some or all of the components of an apparatus, device, system according to embodiments of the present invention. The present invention may also be embodied as apparatus or device programs (e.g., computer programs and computer program products) for performing a portion or all of the methods described herein. Such programs implementing the present invention may be stored on computer-readable media or may be in the form of one or more signals. Such a signal may be downloaded from an internet website or provided on a carrier signal or in any other form.
it should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names.
Claims (10)
1. an anti-shake effect test method is characterized by comprising the following steps:
In a vibration state, the camera module starts the anti-shake function and shoots and obtains N starting test charts of a test target; n is an integer greater than 1;
In a vibration state, the camera module closes the anti-shake function and shoots and obtains M closed test charts of the test target; m is an integer greater than 1;
and comparing the imaging position of the test target in the N open test charts with the imaging position of the test target in the M closed test charts to determine the anti-shake effect.
2. The method of claim 1, wherein:
The anti-shake function is opened to the module of making a video recording and N that obtains the test target is opened and is opened test chart, includes: the camera module starts the anti-shake function and continuously shoots and acquires N starting test charts of a test target at a preset frequency;
The module of making a video recording closes the anti-shake function and shoots and obtains M of test target closes the test chart, includes: and the camera module closes the anti-shake function and continuously shoots and acquires M closed test charts of the test target at the preset frequency.
3. the method of claim 2, wherein M is equal to N and M is greater than or equal to 4.
4. a method as claimed in any one of claims 2 or 3, wherein: the preset frequency is greater than or equal to 4 times of the vibration frequency of the vibration state.
5. The method of claim 1, wherein said comparing the imaging position of the test object in the N open-start test charts and the imaging position of the test object in the M closed-start test charts to determine the anti-shake effect comprises:
Calculating the opening imaging center position of the test target of each opening test chart in the N opening test charts, and determining the opening movement parameters of the test target in the N opening test charts according to the opening imaging center position;
calculating the closed imaging center position of the test target of each closed test chart in the M closed test charts, and determining the closed movement parameters of the test target in the M closed test charts according to the closed imaging center position;
and determining the anti-shake effect according to the opening movement parameter and the closing movement parameter.
6. the method of claim 5, wherein:
The determining of the opening movement parameters of the test target in the N opening test charts according to the opening imaging center position comprises the following steps: fitting an opening sine curve according to the opening imaging center position of the N opening test patterns, and taking the amplitude of the opening sine curve as the opening movement parameter;
The determining of the closing movement parameters of the test targets in the M closing test charts according to the closing imaging center position includes: and fitting a closing sine curve according to the closing imaging center positions of the M closing test graphs, and taking the amplitude of the closing sine curve as the closing movement parameter.
7. The method according to any one of claims 5 or 6, wherein determining the anti-shake effect based on the opening movement parameter and the closing movement parameter comprises:
The compression ratio is calculated according to the following formula: compression ratio a × lg (opening movement parameter/closing movement parameter); a is a preset value
and comparing the calculated compression ratio with a preset compression ratio standard, and determining the anti-shake effect according to the comparison result.
8. An anti-shake effect testing device, comprising:
The starting module is used for starting the anti-shake function and shooting and obtaining N starting test charts of the test target in a vibration state; n is an integer greater than 1;
The closing module is used for closing the anti-shake function and shooting and obtaining M closing test charts of the test target in a vibration state by the camera module; m is an integer greater than 1;
And the comparison module is used for comparing the imaging position of the test target in the N open test charts with the imaging position of the test target in the M closed test charts to determine the anti-shake effect.
9. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor when executing the program performs the steps of:
in a vibration state, the camera module starts the anti-shake function and shoots and obtains N starting test charts of a test target; n is an integer greater than 1;
In a vibration state, the camera module closes the anti-shake function and shoots and obtains M closed test charts of the test target; m is an integer greater than 1;
And comparing the imaging position of the test target in the N open test charts with the imaging position of the test target in the M closed test charts to determine the anti-shake effect.
10. a computer-readable storage medium, on which a computer program is stored, which program, when executed by a processor, carries out the steps of:
in a vibration state, the camera module starts the anti-shake function and shoots and obtains N starting test charts of a test target; n is an integer greater than 1;
in a vibration state, the camera module closes the anti-shake function and shoots and obtains M closed test charts of the test target; m is an integer greater than 1;
And comparing the imaging position of the test target in the N open test charts with the imaging position of the test target in the M closed test charts to determine the anti-shake effect.
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