Industrial camera adaptive automatic focusing method and industrial camera adaptive automatic focusing device

An industrial camera and auto-focus technology, applied in focusing devices, cameras, installations, etc., can solve problems such as complex focusing process, low detection accuracy, and poor adaptability of LCD screens

Active Publication Date: 2018-10-09
BEIJING LUSTER LIGHTTECH
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Problems solved by technology

[0005] This application provides an adaptive auto-focus method for industrial cameras to solve the problem of poor adaptability of existing detection equipment to LCD screens, low de

Method used

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  • Industrial camera adaptive automatic focusing method and industrial camera adaptive automatic focusing device
  • Industrial camera adaptive automatic focusing method and industrial camera adaptive automatic focusing device
  • Industrial camera adaptive automatic focusing method and industrial camera adaptive automatic focusing device

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Embodiment Construction

[0056] Please see attached figure 1 , which shows the process steps of an adaptive autofocus method for an industrial camera.

[0057] A method for adaptive autofocus of an industrial camera, comprising the following steps:

[0058] Step S1, keep the moving axis of the industrial camera unchanged, move the industrial camera freely, and collect images of the reference screen multiple times, wherein the reference screen is set on the same axis as the industrial camera.

[0059] The reference screen, that is, the reference LCD screen, is set on the same axis as the industrial camera. The reference screen is set at the position of the display screen and remains still. On this axis, the industrial camera is moved back and forth. After each movement, an image of the reference screen is collected .

[0060] Step S2, calculating the sharpness value of each reference screen image, and selecting the image position with the largest sharpness value.

[0061] Each LCD screen has an imag...

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Abstract

The invention provides an industrial camera adaptive automatic focusing method and an industrial camera adaptive automatic focusing device, which relate to the technical field of automatic detection.The method comprises the following steps: keeping a moving axis of an industrial camera constant, freely moving the industrial camera, acquiring benchmark screen images for many times; calculating a definition value of each benchmark screen image, screening out a benchmark screen image position with highest definition value, taking the benchmark screen image position as a focusing layer beta, extracting information about the benchmark screen image at the focusing layer beta, storing the information as template information; creating index table information based on the template information; moving the industrial camera, acquiring a to-be-detected screen image, and performing comparing and judging for the to-be-detected screen image and the index table information; and performing adaptive automatic focusing according to a judging result. The method is simple and fast in focusing, has high robustness for being suitable for variation of outside lighting conditions, is suitable for different types of LCD screens and the screens of different working procedure stages, has high detection precision, can improve automation degree of detection equipment and can improve working efficiency.

Description

technical field [0001] The present application relates to the technical field of automatic detection, in particular to an adaptive auto-focus method and device for an industrial camera. Background technique [0002] With the continuous increase of functions and types of electronic products, the demand for LCD screens (Liquid Crystal Displays, liquid crystal displays) is also increasing, and the requirements for LCD screens are also getting higher and higher, which requires strict testing of LCD screens. To ensure that the screen function meets the usage requirements. At present, all kinds of detection equipment use industrial cameras for auxiliary detection. Industrial cameras can improve the automation of detection equipment. The design of existing industrial cameras is generally based on the search algorithm of the climbing method. The information includes the location of the starting point, the heuristic function, so that the search continues to advance, and finally find...

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Application Information

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IPC IPC(8): G03B13/36G02B7/36
CPCG02B7/36G03B13/36
Inventor 王太兴姚毅
Owner BEIJING LUSTER LIGHTTECH
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