Infrared thermal imager focusing method and device

A technology of infrared thermal imager and focusing method, which is applied in the direction of image communication, TV, color TV parts, etc. It can solve the problems of low focusing accuracy and shorten focusing time, so as to shorten focusing time, simplify model selection and assembly , cost-saving effect

Inactive Publication Date: 2013-11-27
上海博锐特光电科技有限公司
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Problems solved by technology

[0008] The technical problem to be solved by the present invention is to provide a method and device for focusing an infrared thermal imager in view of the deficiencies in the prior art. On the one hand, it overcomes the problem of low focusing accuracy in the climbing algorithm. The focusing lens is fully traversed, which greatly shortens the focusing time

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  • Infrared thermal imager focusing method and device
  • Infrared thermal imager focusing method and device
  • Infrared thermal imager focusing method and device

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[0039] In order to make the objectives, technical solutions, and advantages of the present invention clearer, the following further describes the present invention in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention.

[0040] The present invention will be further described below in conjunction with the drawings:

[0041] figure 1 The envelope in (a), the ideal climbing curve, and the true climbing curve are statistically quantified values ​​for the sharpness of each frame of image. The climbing is equivalent to the sharpness getting higher and higher during the focusing process. The slope is equivalent to the sharpness getting lower and lower during the focusing process, Sum(i) characterizes the image sharpness, SumPP characterizes the image focus point, image 3 The part in the box is the central processing u...

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Abstract

The invention relates to an infrared thermal imager focusing method and an infrared thermal imager focusing device. The focusing method comprises the steps of calculating a static image noise threshold value, searching a peak of imaging definition, and scanning imaging definition of position points after the occurrence of the peak, so as to fine the position of a clearest point, thereby greatly shortening focusing time and increasing focusing precision; and the focusing device realizes the computer control without manual debugging, and is convenient in operation. The infrared thermal imager focusing method and device has the beneficial effects that: on one hand, the problem of low focusing precision in the climbing algorithm is overcame; and on the other hand, the full-course traverse is not required for the focusing lens, thereby greatly shortening the focusing time.

Description

technical field [0001] The invention relates to a focusing method and device of imaging equipment, in particular to a focusing method and device of an infrared thermal imager. Background technique [0002] Obtaining a clear image is the most basic requirement of various digital imaging equipment. There is a set of focusing lenses in the multi-group lenses of the camera lens. The focusing purpose can be achieved by changing the position of the focusing group lenses. Automatic focusing can replace manual completion of this process. This saves a lot of time and improves image quality. The focusing process of the infrared thermal imager is actually a process of finding the focal length of the best-definition image, which is divided into manual focusing and automatic focusing. [0003] Auto focus method There are two main focus methods: one is based on the climbing algorithm, the key technology is to find the peak in the image to determine that the system has focused; the imagin...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/232H04N5/33H04N5/357
Inventor 邓先武
Owner 上海博锐特光电科技有限公司
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