Automatic gain control display method for floating point image

A technology of automatic gain control and display method, which is applied in image enhancement, image analysis, image data processing, etc. It can solve the problems of floating-point image histogram statistics and automatic gain control difficulties, so as to solve the problem of automatic gain control and enhance image expressive effect

Active Publication Date: 2017-05-31
TIANJIN XITONG ELECTRONICS EQUIP CO LTD
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Problems solved by technology

[0004] The key problem of the gain bias control method is the automatic acquisition method of the gain coefficient k. In the shaping format image, the gain coefficient k can be calculated by referring to the histogram, so as to obtain a better display effect, but because the floating-point image cannot directly perform the histogram graph statistics, making automatic gain control difficult

Method used

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  • Automatic gain control display method for floating point image
  • Automatic gain control display method for floating point image
  • Automatic gain control display method for floating point image

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Embodiment

[0064]In this embodiment, an uncooled thermal imaging camera with a resolution of 640*512 is used to obtain raw data, which is converted into a floating-point image after intermediate image processing. The average gray value of the floating-point image is 0.8947, the minimum gray value is 0.8168, and the maximum gray value is 1.0. Such as figure 1 shown.

[0065] Step 1: Convert the floating-point image to integer data format image J. According to the formulas (2)~(4), get λ 1 =105146,λ 2 =16383, λ=16383, according to the formula (5) to obtain the shaping data format image J. Such as figure 2 shown.

[0066] Step 2: Calculate the histogram of the image J in the shaping data format. According to the formula (6) ~ (10), calculate k 1 =0.0850,k 2 = 0.4904, k = 0.2269. Such as image 3 shown.

[0067] Step 3: Obtain the final output image according to formula (11), such as Figure 4 shown.

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Abstract

The invention belongs to the technical field of image display processing and particularly relates to an automatic gain control display method for a floating point image. According to the method, automatic control of output gains of infrared floating point images of different scenes is realized, floating point image expression is enhanced, and the automatic gain control problem of the floating point image is solved.

Description

technical field [0001] The invention belongs to the technical field of image display processing, and in particular relates to an automatic gain control display method for floating-point images. Background technique [0002] In applications such as infrared thermal wave non-destructive testing, it is usually necessary to perform data processing on the original infrared image. In order to improve the processing accuracy, the resulting image is usually a floating-point image, and most display systems only accept images in 8-bit integer data format. Signal input, so the floating-point image data needs to be converted into an 8-bit integer image data format suitable for display. [0003] In the process of converting floating-point images to 8-bit plastic images, the gain bias control method is usually used to realize data format conversion and image enhancement, which has the advantages of strong scene adaptability, less resource occupation, and fast processing speed. [0004] T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/00G06T3/00
CPCG06T3/0012G06T5/003G06T2207/10048
Inventor 李科李玉杰赵思宁马金鹏
Owner TIANJIN XITONG ELECTRONICS EQUIP CO LTD
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