Automatic focusing method of infrared imaging system

An infrared imaging system and auto-focus technology, which is applied in the parts of TV system, image communication, and color TV parts, etc., can solve the problem that there is no detailed discussion on the focus of infrared images, achieve the stability of the focusing process, and overcome the low The effect of high signal-to-noise ratio and high work efficiency

Active Publication Date: 2013-09-25
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

Although there have been relatively mature researches on the focusing of general digital images, there is no detailed discussion on the focusing of infrared images.

Method used

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  • Automatic focusing method of infrared imaging system
  • Automatic focusing method of infrared imaging system
  • Automatic focusing method of infrared imaging system

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Embodiment Construction

[0026] Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0027] figure 1 Shows a schematic flow chart of an automatic focusing method for an infrared imaging system according to an embodiment of the present invention, combined below figure 1 Each step of the automatic focusing method of the infrared imaging system according to the embodiment of the present invention will be described in detail.

[0028] Such as figure 1 As shown, in the embodiment of the present invention, in step 10, it is first determined whether a focusing operation is required. When the judging result is that no focusing operation is currently required, go to step 32, that is, use the infrared imaging system to perform a normal infrared imaging process; steps of the process.

[0029] In the embodiment of the present invention, the judging condition for judging whether the focusing operation needs to be performed can be flexibly set acc...

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Abstract

The invention discloses an automatic focusing method of an infrared imaging system. The automatic focusing method includes the steps of judging whether the focusing operation is needed or not, calculating the image stretching coefficient and selecting a focusing window if the focusing operation is needed, then obtaining infrared image data, conducting gray stretching on the infrared image data through the calculated image stretching coefficient, saving data after the gray stretching is carried out on the data in the focusing window in a focusing window matrix, using the focusing window matrix to calculate evaluation function values, judging whether the current focusing position is the best focusing position or not according to the evaluation function values, finishing the focusing process if the current focusing position is the best focusing position, otherwise adjusting a lens and executing the steps again. The automatic focusing method of the infrared imaging system gives considerations to characteristics of infrared imaging system imaging and automatic focusing, overcomes the shortcoming of the infrared image low signal-to-noise ratio, and is stable in focusing process and high in work efficiency.

Description

technical field [0001] The invention relates to the field of infrared imaging systems, in particular to an automatic focusing method for an infrared imaging system. Background technique [0002] Since entering the digital information age, the focusing method has developed from the traditional active focusing method to the passive focusing method used in digital imaging. In the process of passive focusing, the best focusing position is determined by analyzing and comparing the information of the image data acquired by the lens at different focusing positions. Although there have been relatively mature researches on the focusing of general digital images, there is no detailed discussion on the focusing of infrared images. [0003] Different from general digital image focusing, infrared imaging has the characteristics of low signal-to-noise ratio when imaging. Therefore, the following issues need to be considered when considering the method of infrared imaging system with auto...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/232H04N5/33
Inventor 刘子骥马宣章翔易乐郑兴
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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