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Quick and automatic focusing method and system for long-focus visible-light industrial lens

An automatic focusing and visible light technology, which is applied in focusing devices, TV system components, optics, etc., can solve problems such as the inability to meet the automatic focusing requirements of long focal length industrial lenses, single applicable scenarios, conflicts between focusing speed and focusing precision, and achieve High-accuracy auto-focus function, simple circuit structure, perfect effect of auto-focus function

Active Publication Date: 2015-01-14
FUJIAN FORECAM OPTICS CO LTD
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AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems that the existing autofocus method is applicable to a single scene, there is a conflict between focusing speed and focusing accuracy, and it cannot meet the needs of autofocusing for long focal length industrial lenses, the purpose of the present invention is to provide a long focal length visible light industrial lens based on image processing. Fast auto-focus method and system

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  • Quick and automatic focusing method and system for long-focus visible-light industrial lens
  • Quick and automatic focusing method and system for long-focus visible-light industrial lens

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Embodiment Construction

[0031] Such as figure 1As shown, a fast automatic focusing system of a long focal length visible light industrial lens, including: a focus drive module, used to drive the focus motor, adjust the distance between the lens and the imaging sensor, so as to achieve the best focus position and obtain a clear image; image acquisition The module is used to obtain real-time scene images from the lens camera, and collect image data according to the needs of subsequent analysis; the image processing module is used to filter out interference signals in each image, extract feature information, and determine the best according to a predetermined analysis strategy. The position of the focal plane where the sharpness is located; and the camera integral control or identification module, which is used to control or identify the integral exposure time of the camera, and control the direction and speed of the focus motor rotation through the focusing drive module to achieve the purpose of precise...

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Abstract

The invention relates to the field of automatic focusing of a long-focus visible-light industrial lens, in particular to a quick and automatic focusing method and system for the long-focus visible-light industrial lens based on image analysis. According to the automatic focusing method, a self-adaption algorithm based on image analysis, a quick focusing strategy in linkage with a focal length, a self-adaption speed-change and step-length searching strategy, a compatible direct-current or step motor, colored or black-and-white image self-adaption, feature parameters capable of reconstructed by users and an upgradable definition assessment strategy are adopted. The automatic focusing system combines an FPGA with an MCU organically in hardware and gives full play to characteristics in software design, advantages of devices are effectively used to carry out task assignment and resource integration, and accordingly the circuit is simple in structure, the automatic focusing function is better, the automatic focusing function can be achieved stably, reliably, quickly, sensitively and highly accurately, and the quick and automatic focusing requirements of most long-focus visible-light industrial lenses on the market can be met.

Description

technical field [0001] The invention relates to the field of automatic focusing of long focal length visible light industrial lenses, in particular to a fast automatic focusing method and system for long focal length visible light industrial lenses. Background technique [0002] With the gradual advancement of the work of "Safe China" and "Smart City", the concept of safety has penetrated more and more into the daily life of ordinary people, and it is no longer a unique symbol such as banks, prisons, and key projects. The importance of security monitoring systems Sex is more prominent. In the past, the monitoring system first pursued breakthroughs from scratch, and the deterrent effect dominated, and later developed to have higher-level capabilities such as alarms and records. Recently, it has been continuously reported that the existing monitoring systems generally have shortcomings such as short distances and low resolution. The images obtained can only be roughly judged,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/232G02B7/28G03B13/36
Inventor 肖维军张亚芳林春生刘辉周宝藏
Owner FUJIAN FORECAM OPTICS CO LTD
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