OIS optical anti-vibration module automatic calibration system based on hill-climbing search

Abstract

The invention discloses an OIS optical anti-shake module automatic calibration system based on hill-climbing search. The OIS optical anti-shake module automatic calibration system comprises an optical anti-shake module automatic calibration system composed of a Chart drawing, an acquisition module, a vibration module and a control system. The system further comprises an OIS anti-shake product, the OIS anti-shake product is arranged between the Chart drawing and the vibration module, the Chart drawing is arranged on a shooting position of the OIS anti-shake product, the Chart drawing is shot by the OIS anti-shake product, the acquisition module is in signal connection with the OIS anti-shake product, and the acquisition module is used for capturing an image of the OIS anti-shake product and sending the image to the vibration module. According to the method, the gain value of the gain amplification coefficient of the OIS feedback loop is continuously corrected by adopting the hill-climbing search algorithm so as to adjust to the optimal OIS effect, the product is detected, and finally, the optical anti-shake product meeting the customer requirement is conveniently sorted, so that the problem of an original OIS calibration process needing visual and manual adjustment by staff can be solved, and the effect of full-automatic production is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of camera module OIS calibration, and in particular to an OIS optical image stabilization module automatic calibration system based on hill climbing search. Background Art

[0002] The camera module is a key component used in electronic devices to capture and record images or videos. It usually includes lenses, image sensors, image processing chips, circuit boards and other main parts. The design and performance of the camera module have an important impact on the quality and accuracy of image capture, and is widely used in mobile phones, tablets, laptops, surveillance cameras and other devices.

[0003] Currently, among terminal mobile phone products, camera modules with optical image stabilization function have become standard equipment for high-end flagship models. Systematizing, intelligentizing, automating and making efficient the calibration process of optical image stabilization modules is a necessary condition for achieving large-scale mass production of such products. A set of intelligent optical image stabilization product calibration system can greatly improve the production efficiency and product quality of such products.

[0004] Therefore, for the calibration of the camera module OIS, we specifically invented an OIS optical image stabilization module automatic calibration system based on hill climbing search, aiming to solve the problem of the original OIS calibration process that technical employees need to adjust visually and manually. Summary of the invention

[0005] In order to overcome the above-mentioned shortcomings, the present invention aims to provide a technical solution that can solve the above-mentioned problems.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an OIS optical image stabilization module automatic calibration system based on hill climbing search, comprising an optical image stabilization module automatic calibration system composed of a Chart drawing, an acquisition module, a vibration module and a control system; and also comprising an OIS image stabilization product, wherein the OIS image stabilization product is arranged between the Chart drawing and the vibration module.

[0007] As a further solution of the present invention: the Chart drawing is placed on a shooting position of an OIS anti-shake product, and the Chart drawing is shot by the OIS anti-shake product.

[0008] As a further solution of the present invention: the acquisition module is connected to the OIS anti-shake product signal, and the acquisition module is used to capture the image of the OIS anti-shake product.

[0009] As a further solution of the present invention: the acquisition module is connected to the control system signal, and the image acquired by the acquisition module is transmitted to the control system.

[0010] As a further solution of the present invention: the OIS anti-shake product follows the vibration of the platform through a vibration module.

[0011] As a further solution of the present invention: the vibration module is connected to a control system, and the control system controls the operation of the vibration module.

[0012] As a further solution of the present invention: the automatic calibration system of the optical image stabilization module drives the vibration module to place the calibrated module in a calibration environment that vibrates at a certain frequency and a certain angle, and drives the module to shoot a chart of specific mark punctuation points at a certain frame rate.

[0013] As a further solution of the present invention: after the Chart is taken, the image is output and the image is continuously collected for analysis and calculation, and the gain value of the OIS feedback loop gain amplification factor is continuously corrected using a hill climbing search algorithm to adjust to the best OIS effect.

[0014] As a further solution of the present invention: the OIS anti-shake product vibrates with the vibration module at a frequency of 4 Hz-10 Hz and an angle swing of 1 degree, and continuously captures the maximum displacement of the coordinates of the Mark point in the displayed image.

[0015] As a further solution of the present invention: when the displacement of the displayed punctuation mark is the smallest, it is an ideal OIS anti-shake effect.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The invention of the present application is that the system drives the vibration module to place the calibrated module in a calibration environment that vibrates at a certain frequency and a certain angle, and drives the module to shoot a chart of specific Mark punctuation (circular punctuation) at a certain frame rate, outputs images and continuously collects images for analysis and calculation, and uses a hill climbing search algorithm to continuously correct the gain value of the OIS feedback loop gain amplification factor to adjust to the best OIS effect, and detects the product, and finally facilitates the sorting of optical image stabilization products that meet customer requirements. This design can solve the problem of the original OIS calibration process that requires employees to visually and manually adjust, and achieve the effect of fully automated production. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a control principle diagram of a calibration system of an OIS optical image stabilization module automatic calibration system based on hill climbing search of the present invention;

[0019] Figure 2 It is a principle diagram of a vibration image of an automatic calibration system of an OIS optical image stabilization module based on hill climbing search of the present invention;

[0020] Figure 3 The present invention is a schematic diagram of a hill climbing search algorithm for an OIS optical image stabilization module automatic calibration system based on hill climbing search. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] See also Figure 1-3 An OIS optical image stabilization module automatic calibration system based on hill climbing search includes an optical image stabilization module automatic calibration system composed of a Chart drawing, an acquisition module, a vibration module and a control system; and also includes an OIS image stabilization product, which is arranged between the Chart drawing and the vibration module.

[0023] For further information, see Figure 1 , the Chart drawing is placed on the shooting position of the OIS anti-shake product, and the Chart drawing is taken by the OIS anti-shake product.

[0024] For further information, see Figure 1 The acquisition module is connected to the OIS anti-shake product signal, and the acquisition module is used to capture the image of the OIS anti-shake product.

[0025] For further information, see Figure 1 The acquisition module is connected to the control system signal, and the image acquired by the acquisition module is transmitted to the control system.

[0026] For further information, see Figure 1 , OIS anti-shake products follow the platform vibration through the vibration module.

[0027] For further information, see Figure 1 The vibration module is connected to the control system, and the control system controls the operation of the vibration module.

[0028] For further information, see Figure 1-2 The automatic calibration system of the optical image stabilization module drives the vibration module to place the calibrated module in a calibration environment that vibrates at a certain frequency and angle, and drives the module to shoot a chart of specific mark punctuation (circular punctuation) at a certain frame rate. After the chart is shot, the image is output and continuously collected for image analysis and calculation. The hill climbing search algorithm is used to continuously correct the gain value of the OIS feedback loop gain amplification factor to adjust to the best OIS effect.

[0029] For further information, see Figure 3The OIS anti-shake product vibrates with the vibration module at a frequency of 4Hz-10Hz and an angle swing of 1 degree, continuously capturing the maximum displacement of the Mark point coordinates in the displayed image. When the displayed mark point displacement is the smallest, it is an ideal OIS anti-shake effect.

[0030] See also Figure 3 It should be noted that the OIS anti-shake product vibrates with the vibration module at a frequency of 4 to 10 Hz and an angle swing of 1 degree, continuously capturing the maximum displacement of the center of mass coordinates of the Mark point in the displayed image. When the displayed mark point displacement is the smallest, the best OIS anti-shake effect is achieved. The gain value is used as the horizontal coordinate x, and the maximum displacement of the center of mass of the mark image is used as the vertical coordinate y. The calibration curve is recorded. First, the gain value is continuously increased with a large step size, and the maximum displacement of the center of mass of the Mark image within a vibration cycle is recorded. The trough area of ​​the maximum displacement data y is quickly found, and then the corresponding step during the large step search is reversed. The gain value is further continuously increased with a smaller step size, and the maximum displacement of the center of mass of the Mark image is recorded. A fine search is performed and the horizontal coordinate gain value of the trough position of the center of mass displacement y is obtained again, which is the loop gain gain value with the best anti-shake effect. The gain value is used to check whether the product performance meets the quality requirements, and the mechanical pick-and-place device is controlled to sort and ship.

[0031] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. An OIS optical image stabilization module automatic calibration system based on hill climbing search, characterized in that: It includes an automatic calibration system for the optical image stabilization module, which is composed of a chart drawing, an acquisition module, a vibration module, and a control system; It also includes an OIS anti-shake product, which is arranged between the Chart drawing and the vibration module.

2. The OIS optical image stabilization module automatic calibration system based on hill climbing search according to claim 1, characterized in that: The Chart drawing is placed on the shooting position of the OIS anti-shake product, and the Chart drawing is shot by the OIS anti-shake product.

3. The OIS optical image stabilization module automatic calibration system based on hill climbing search according to claim 1, characterized in that: The acquisition module is connected to the OIS anti-shake product signal, and the acquisition module is used to capture the image of the OIS anti-shake product.

4. The OIS optical image stabilization module automatic calibration system based on hill climbing search according to claim 1, characterized in that: The acquisition module is connected to the control system signal, and the image acquired by the acquisition module is transmitted to the control system.

5. The OIS optical image stabilization module automatic calibration system based on hill climbing search according to claim 1, characterized in that: The OIS anti-shake product follows the platform vibration through the vibration module.

6. The OIS optical image stabilization module automatic calibration system based on hill climbing search according to claim 5, characterized in that: The vibration module is connected to a control system, and the control system controls the vibration module to work.

7. The OIS optical image stabilization module automatic calibration system based on hill climbing search according to claim 1, characterized in that: The automatic calibration system of the optical image stabilization module drives the vibration module to place the module to be calibrated in a calibration environment that vibrates at a certain frequency and angle, and drives the module to shoot a chart of specific mark punctuation points at a certain frame rate.

8. The OIS optical image stabilization module automatic calibration system based on hill climbing search according to claim 7, characterized in that: After the Chart is taken, the image is output and continuously collected for image analysis and calculation, and the gain value of the OIS feedback loop gain amplification factor is continuously corrected using a hill climbing search algorithm to adjust to the best OIS effect.

9. The OIS optical image stabilization module automatic calibration system based on hill climbing search according to claim 1, characterized in that: The OIS anti-shake product vibrates with the vibration module at a frequency of 4Hz-10Hz and an angle swing of 1 degree, continuously capturing the maximum displacement of the coordinates of the mark point in the displayed image.

10. The OIS optical image stabilization module automatic calibration system based on hill climbing search according to claim 9, characterized in that: When the displayed punctuation point displacement is the smallest, it is an ideal OIS anti-shake effect.

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