CN112581538A - Method and device for obtaining motor sensitivity - Google Patents
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Abstract
The invention relates to a method and a device for acquiring motor sensitivity, wherein the method comprises the following steps: acquiring first displacements corresponding to two positions, wherein the first displacements corresponding to two position coordinates are displacements corresponding to a moving process of a motor-driven lens; acquiring a second displacement, wherein the second displacement is a displacement corresponding to an identification graph in the same picture acquired from the front of the lens to the back of the lens; based on the first displacement and the second displacement, the motor sensitivity is obtained, and the obtaining precision of the motor sensitivity is improved.
Description
Technical Field
The invention relates to the technical field of optical image processing, in particular to a method and a device for acquiring motor sensitivity.
Background
The OIS is a general name of an Optical Image Stabilization system (Optical Image Stabilization), and its working principle is to compensate hand shake by driving the lens to move in the X and Y directions through a motor, so as to achieve the purpose of clear imaging.
Therefore, in the camera with the OIS system, OIS motor sensitivities are defined, that is, when the OIS motor moves in the X direction (or the Y direction) by one displacement, some drive ICs such as RomhBU63169 set the motor sensitivities of the same type of drive IC to a fixed value according to the actual physical stroke, but the motor sensitivities of different modules are different in actual production.
Therefore, how to obtain the motor sensitivity of each module quickly is an urgent technical problem to be solved at present.
Disclosure of Invention
In view of the above, the present invention has been made to provide a method and apparatus for obtaining motor sensitivity that overcomes or at least partially solves the above problems.
In a first aspect, the present invention provides a method for obtaining motor sensitivity, including:
acquiring first displacements corresponding to two position coordinates, wherein the first displacements corresponding to the two position coordinates are displacements corresponding to a moving process of a motor-driven lens;
acquiring a second displacement, wherein the second displacement is a displacement corresponding to an identification graph in the same picture acquired from the front of the lens to the back of the lens;
based on the first displacement and the second displacement, a motor sensitivity is obtained.
Further, the acquiring the first displacement corresponding to the two position coordinates includes:
acquiring the two position coordinates, wherein the two position coordinates are coordinates before and after the movement of the motor-driven lens stored in the register, and comprise a first position coordinate of a first position where the lens is located before the movement and a second position coordinate of a second position where the lens is located after the movement;
obtaining the first displacement based on the first position coordinate and the second position coordinate, wherein the first displacement is a distance between the first position coordinate and the second position coordinate.
Further, the obtaining a second displacement, where the second displacement is a displacement of an identification pattern in the same picture obtained after the lens is moved before the lens is moved, is characterized by including:
acquiring a first picture shot by the lens at the first position and a second picture shot by the lens at the second position, wherein the lens shoots the same form chart at the first position and the second position, and the form chart is provided with more than one identification graph;
obtaining a third position coordinate corresponding to each identification graph on the first picture and a fourth position coordinate corresponding to each identification graph on the second picture;
and obtaining the second displacement based on the third position coordinate and the fourth position coordinate, wherein the second displacement is the distance between the third position coordinate and the fourth position coordinate corresponding to each identification graph.
Further, the obtaining a motor sensitivity based on the first displacement and the second displacement includes:
the second displacement corresponding to each identification graph is respectively subjected to quotient with the first displacement to obtain a plurality of first ratios;
and averaging the plurality of first ratios to obtain the motor sensitivity.
Further, the obtaining a motor sensitivity based on the first displacement and the second displacement includes:
the first displacement is respectively subjected to quotient with a second displacement corresponding to each identification graph to obtain a plurality of second ratios;
and averaging the plurality of second ratios to obtain the motor sensitivity.
Further, the plurality of identification patterns are specifically circles, square frames, rectangular frames or oval frames.
In a second aspect, the present invention further provides an apparatus for obtaining motor sensitivity, including:
the actual displacement acquisition module is used for acquiring first displacements corresponding to two position coordinates, wherein the first displacements corresponding to the two position coordinates are displacements corresponding to the moving process of the motor-driven lens;
the image displacement acquisition module is used for acquiring a second displacement, wherein the second displacement is the displacement corresponding to the identification image in the same image obtained after the lens is moved before the lens is moved;
and the motor sensitivity obtaining module is used for obtaining the motor sensitivity based on the first displacement and the second displacement.
Further, the actual displacement obtaining module includes:
the actual coordinate acquisition unit is used for acquiring the two position coordinates, wherein the two position coordinates are coordinates before and after the movement of the motor-driven lens stored in the register, and comprise a first position coordinate of a first position where the lens is located before the movement and a second position coordinate of a second position where the lens is located after the movement;
a first displacement obtaining unit configured to obtain the first displacement based on the first position coordinate and the second position coordinate, where the first displacement is a distance between the first position coordinate and the second position coordinate.
In a third aspect, the present invention also provides an electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the above-mentioned method steps when executing the program.
In a fourth aspect, a computer-readable storage medium has stored thereon a computer program which, when being executed by a processor, carries out the above-mentioned method steps.
One or more technical solutions in the embodiments of the present invention have at least the following technical effects or advantages:
the invention provides a method for acquiring motor sensitivity, which comprises the following steps: acquiring first displacements corresponding to two position coordinates, wherein the first displacements corresponding to the two position coordinates are displacements corresponding to a moving process of a motor-driven lens, and acquiring second displacements, and the second displacements are displacements corresponding to identification graphs in the same picture acquired before the lens is moved and after the lens is moved; based on the first displacement and the second displacement, the motor sensitivity is obtained, image displacement is obtained in a picture shooting mode, the physical displacement of the lens is displayed according to data recorded by the register, the actual motor sensitivity is obtained according to the image displacement and the physical displacement, and the obtaining precision of the motor sensitivity is improved.
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 flow chart illustrating a method for obtaining motor sensitivity according to a first embodiment of the present invention;
FIGS. 2a and 2b are schematic diagrams illustrating a first picture and a second picture obtained before and after the lens moves according to a first embodiment of the present invention;
FIG. 3 is a schematic structural diagram of an apparatus for obtaining motor sensitivity according to a second embodiment of the present invention;
fig. 4 is a schematic structural diagram of an electronic device implementing the method for obtaining the sensitivity of the motor according to the third embodiment of the present invention.
Detailed Description
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.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present invention, the terms "first", "second", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.
Example one
An embodiment of the present invention provides a method for obtaining sensitivity of a motor, as shown in fig. 1, including:
s101, acquiring first displacements corresponding to the two position coordinates, wherein the first displacements corresponding to the two position coordinates are displacements corresponding to the moving process of the motor-driven lens.
And S102, acquiring a second displacement, wherein the second displacement is the displacement corresponding to the identification graph in the same picture acquired from the front of the lens to the back of the lens.
And S103, obtaining the motor sensitivity based on the first displacement and the second displacement.
In a specific embodiment, first, a certain environment is provided, a light source is provided, a table diagram is provided, the table diagram is provided with an identification graph, and the brightness of the picture is adjusted properly by adjusting the camera module. In the camera module with the optical image anti-shake system, the motor drives the lens to move in the X and Y directions to compensate the shake of hands, so that the aim of clear imaging is fulfilled. Therefore, in order to simulate the movement of the motor-driven lens in the X and Y directions in actual operation, the change in the movement of the motor-driven lens is simulated by the change in the data recorded in the register.
In S101, first positions corresponding to two position coordinates are obtained, and first displacements corresponding to the two position coordinates are displacements corresponding to a moving process of the motor-driven lens.
In an alternative embodiment, the movement of the motor-driven lens is simulated by changing the data stored in the register.
Specifically, the two position coordinates are acquired, which are coordinates before and after the movement of the motor-driven lens stored in the register, including a first position coordinate of a first position where the lens is located before the movement and a second position coordinate of a second position where the lens is located after the movement.
Then, based on the first position coordinates and the second position coordinates, a first displacement, which is a distance between the first position coordinates and the second position coordinates, is obtained.
Specifically, the position of the register at (0x8417 ) is recorded as (0x00 ), i.e., a first position coordinate, and then, the position is recorded as (0x00,0x76E), i.e., a second position coordinate.
Then, based on the first position coordinates and the second position coordinates, a first displacement is obtained.
According to the data recorded in the register, the displacement corresponding to the first displacement of 0x76E is obtained and converted into decimal number 1902, and the first displacement is 1902.
Next, S102 includes: the method comprises the steps of obtaining a first picture shot by a lens at a first position and a second picture shot by the lens at a second position, wherein the lens shoots the same table diagram at the first position and the second position, and the table diagram is provided with more than one identification graph.
The identification pattern is specifically a circle, a square frame, a rectangular frame or an oval frame.
Taking the identification graph as a circle as an example, as shown in fig. 2a and 2b, fig. 2a is a first picture obtained by taking a table diagram with a circle by a lens at a first position, and fig. 2b is a second picture obtained by taking a table diagram with a circle by a lens at a second position.
As shown in fig. 2a and 2b, there are 5 circles, and since one circle is small, it is negligible, and 4 circles are taken. The coordinates of the circle center positions and the radius sizes of the 4 circles (a, b, c, d) are respectively obtained, and the specific values are shown in the following table:
after obtaining the third position coordinate corresponding to each identification pattern on the first picture and the fourth position coordinate corresponding to each identification pattern on the second picture, obtaining a second displacement based on the third position coordinate and the fourth position coordinate, wherein the second displacement is a distance between the third position coordinate and the fourth position coordinate corresponding to each identification pattern.
The second displacement is the actual displacement on the image, and the first displacement is the displacement of the motor-driven lens.
Wherein, if the pixel size corresponding to the sensor is 1.000 μm, the corresponding second displacement of the same identification pattern is as shown in the following table:
taking the circle a as an example, the third position coordinate and the fourth position coordinate corresponding to the circle a are both position coordinates of the number of pixels, and therefore, the actual coordinates need to be multiplied by the size corresponding to a single pixel.
Therefore, after the third position coordinate and the fourth position coordinate of the circle a are obtained, the difference between the X coordinate and the Y coordinate is obtained by subtracting the two position coordinates, and the second displacement is obtained in the above calculation manner.
Of course, in the present invention, the second displacements corresponding to the circle a, the circle b, the circle c, and the circle d are obtained respectively.
Finally, S103 is executed to obtain the motor sensitivity based on the first displacement and the second displacement.
The motor sensitivity can be obtained in two ways:
the second displacement corresponding to each identification pattern is respectively subjected to quotient with the first displacement to obtain a plurality of first ratios, and then the first ratios are averaged to obtain the motor sensitivity.
And in another mode, the first displacement is respectively subjected to quotient with the second displacement corresponding to each identification graph to obtain a plurality of second ratios, and then the second ratios are averaged to obtain the motor sensitivity.
In the first mode, the unit of the motor sensitivity thus obtained is μm/code, and in the second mode, the unit of the motor sensitivity obtained is code/μm.
Specifically, for the above-mentioned 4 circles (a, b, c, d), the motor sensitivities corresponding to them are obtained, and the average value obtained by averaging the four motor sensitivities is obtained:
this high-precision motor sensitivity, i.e., the obtained average value, is obtained.
The motor sensitivity obtained by the method is 27.0 code/mum, the difference is 1.3 with the fixed value of 28.3 code/mum given by a manufacturer, if the motor sensitivity given by the manufacturer is adopted, the difference can cause the precision test item to judge the good product as the defective product, and certainly, the difference of some modules is more than 1.3. Therefore, the motor sensitivity in the invention is adopted to avoid the situation that good products are judged as defective products by mistake in the precision test item.
One or more technical solutions in the embodiments of the present invention have at least the following technical effects or advantages:
the invention provides a method for acquiring motor sensitivity, which comprises the following steps: acquiring first displacements corresponding to two position coordinates, wherein the first displacements corresponding to the two position coordinates are displacements corresponding to a moving process of a motor-driven lens, and acquiring second displacements, and the second displacements are displacements corresponding to identification graphs in the same picture acquired before the lens is moved and after the lens is moved; based on the first displacement and the second displacement, the motor sensitivity is obtained, image displacement is obtained in a picture shooting mode, the physical displacement of the lens is displayed according to data recorded by the register, the actual motor sensitivity is obtained according to the image displacement and the physical displacement, and the obtaining precision of the motor sensitivity is improved.
Example two
Based on the same inventive concept, an embodiment of the present invention further provides an apparatus for obtaining a motor sensitivity, as shown in fig. 3, including:
the actual displacement obtaining module 301 is configured to obtain first displacements corresponding to two position coordinates, where the first displacements corresponding to the two position coordinates are displacements corresponding to a moving process of the motor-driven lens.
A graph displacement obtaining module 302, configured to obtain a second displacement, where the second displacement is a displacement corresponding to an identification graph in a same picture obtained after the lens is moved before the lens is moved;
a motor sensitivity obtaining module 303 obtains a motor sensitivity based on the first displacement and the second displacement.
In an optional implementation, the actual displacement obtaining module 301 includes:
the actual coordinate acquisition unit is used for acquiring the two position coordinates, wherein the two position coordinates are coordinates before and after the movement of the motor-driven lens stored in the register, and comprise a first position coordinate of a first position where the lens is located before the movement and a second position coordinate of a second position where the lens is located after the movement;
a first displacement obtaining unit configured to obtain the first displacement based on the first position coordinate and the second position coordinate, where the first displacement is a distance between the first position coordinate and the second position coordinate.
In an alternative embodiment, the image displacement obtaining module includes:
the image acquisition unit is used for acquiring a first image shot by the lens at the first position and a second image shot by the lens at the second position, the lens shoots the same table diagram at the first position and the second position, and the table diagram is provided with more than one identification graph;
the figure coordinate acquiring unit is used for acquiring a third position coordinate corresponding to each identification figure on the first picture and a fourth position coordinate corresponding to each identification figure on the second picture;
a second displacement obtaining unit, configured to obtain the second displacement based on the third position coordinate and the fourth position coordinate, where the second displacement is a distance between the third position coordinate and the fourth position coordinate corresponding to each identification pattern.
In an alternative embodiment, the motor sensitivity obtaining module 303 includes:
a first ratio obtaining unit, configured to quotient the second displacement corresponding to each identification pattern with the first displacement respectively to obtain a plurality of first ratios;
a first motor sensitivity obtaining unit, configured to average the plurality of first ratios to obtain the motor sensitivity.
In an alternative embodiment, the motor sensitivity obtaining module 303 includes:
a second ratio obtaining unit, configured to quotient the first displacement with a second displacement corresponding to each of the identification patterns, respectively, to obtain a plurality of second ratios;
and the second motor sensitivity obtaining unit is used for averaging the second ratio to obtain the motor sensitivity.
EXAMPLE III
Based on the same inventive concept, a third embodiment of the present invention provides an electronic device, as shown in fig. 4, including a memory 404, a processor 402, and a computer program stored in the memory 404 and executable on the processor 402, where the processor 402 executes the computer program to implement the steps of the method for obtaining the motor sensitivity.
Where in fig. 4 a bus architecture (represented by bus 400) is shown, bus 400 may include any number of interconnected buses and bridges, and bus 400 links together various circuits including one or more processors, represented by processor 402, and memory, represented by memory 404. The bus 400 may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. A bus interface 406 provides an interface between the bus 400 and the receiver 401 and transmitter 403. The receiver 401 and the transmitter 403 may be the same element, i.e., a transceiver, providing a means for communicating with various other apparatus over a transmission medium. The processor 402 is responsible for managing the bus 400 and general processing, while the memory 404 may be used for storing data used by the processor 402 in performing operations.
Example four
Based on the same inventive concept, a fourth embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps of the above method for obtaining the sensitivity of the motor.
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 the apparatus, electronics, or device for obtaining motor sensitivity 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. A method of obtaining motor sensitivity, comprising:
acquiring first displacements corresponding to two position coordinates, wherein the first displacements corresponding to the two position coordinates are displacements corresponding to a moving process of a motor-driven lens;
acquiring a second displacement, wherein the second displacement is a displacement corresponding to an identification graph in the same picture acquired from the front of the lens to the back of the lens;
based on the first displacement and the second displacement, a motor sensitivity is obtained.
2. The method of claim 1, wherein obtaining the first displacement for the two position coordinates comprises:
acquiring the two position coordinates, wherein the two position coordinates are coordinates before and after the movement of the motor-driven lens stored in the register, and comprise a first position coordinate of a first position where the lens is located before the movement and a second position coordinate of a second position where the lens is located after the movement;
obtaining the first displacement based on the first position coordinate and the second position coordinate, wherein the first displacement is a distance between the first position coordinate and the second position coordinate.
3. The method of claim 2, wherein the obtaining a second displacement is a displacement of an identification pattern in the same picture obtained after the lens is moved from the previous position to the next position, and comprises:
acquiring a first picture shot by the lens at the first position and a second picture shot by the lens at the second position, wherein the lens shoots the same form chart at the first position and the second position, and the form chart is provided with more than one identification graph;
obtaining a third position coordinate corresponding to each identification graph on the first picture and a fourth position coordinate corresponding to each identification graph on the second picture;
and obtaining the second displacement based on the third position coordinate and the fourth position coordinate, wherein the second displacement is the distance between the third position coordinate and the fourth position coordinate corresponding to each identification graph.
4. The method of claim 3, wherein obtaining a motor sensitivity based on the first displacement and the second displacement comprises:
the second displacement corresponding to each identification graph is respectively subjected to quotient with the first displacement to obtain a plurality of first ratios;
and averaging the plurality of first ratios to obtain the motor sensitivity.
5. The method of claim 3, wherein obtaining a motor sensitivity based on the first displacement and the second displacement comprises:
the first displacement is respectively subjected to quotient with a second displacement corresponding to each identification graph to obtain a plurality of second ratios;
and averaging the plurality of second ratios to obtain the motor sensitivity.
6. The method of claim 1, wherein the plurality of identification patterns are embodied as circles, square boxes, rectangular boxes, or oval boxes.
7. An apparatus for obtaining motor sensitivity, comprising:
the actual displacement acquisition module is used for acquiring first displacements corresponding to two position coordinates, wherein the first displacements corresponding to the two position coordinates are displacements corresponding to the moving process of the motor-driven lens;
the image displacement acquisition module is used for acquiring a second displacement, wherein the second displacement is the displacement corresponding to the identification image in the same image obtained after the lens is moved before the lens is moved;
and the motor sensitivity obtaining module is used for obtaining the motor sensitivity based on the first displacement and the second displacement.
8. The apparatus of claim 7, wherein the actual displacement acquisition module comprises:
the actual coordinate acquisition unit is used for acquiring the two position coordinates, wherein the two position coordinates are coordinates before and after the movement of the motor-driven lens stored in the register, and comprise a first position coordinate of a first position where the lens is located before the movement and a second position coordinate of a second position where the lens is located after the movement;
a first displacement obtaining unit configured to obtain the first displacement based on the first position coordinate and the second position coordinate, where the first displacement is a distance between the first position coordinate and the second position coordinate.
9. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the method steps of any of claims 1-6 when executing the program.
10. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the method steps of any one of claims 1 to 6.
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Cited By (1)
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| CN113747077A (en) * | 2021-09-26 | 2021-12-03 | 维沃移动通信有限公司 | Camera shake compensation method, device, equipment, medium and camera assembly |
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| CN113747077A (en) * | 2021-09-26 | 2021-12-03 | 维沃移动通信有限公司 | Camera shake compensation method, device, equipment, medium and camera assembly |
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