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Infrared image enhancement method

An infrared image and image technology, applied in image enhancement, image analysis, image data processing, etc., to achieve the effect of target enhancement and detail highlighting

Inactive Publication Date: 2017-07-07
CHINA JILIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, there is a lack of image enhancement methods that effectively improve the histogram equalization method in the prior art.

Method used

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Embodiment Construction

[0039] In order to describe the technical content of the present invention and realize the effect in detail, the detailed description will be given below in conjunction with the embodiments and accompanying drawings.

[0040] Embodiments of the present invention are as follows:

[0041] The target image to be processed is an infrared thermal image during the heating process of an electric iron, such as figure 2 , is an 8-bit grayscale image. Get the histogram of the image to be processed, such as image 3 , and analyze its distribution characteristics.

[0042] (1) Use the histogram equalization method to process the image, the processed image is as follows Figure 4 , and get the histogram of the new image, such as Figure 5 ;

[0043] (2) Use the maximum inter-class variance method to obtain the segmentation threshold used to segment the image background and the target, set the threshold from 1 to 256, find the inter-class variance value at different thresholds, and fi...

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Abstract

The invention discloses an infrared image enhancement method. A histogram equalization method is used to process an image; a maximal inter-class variance method is used to obtain a segmentation threshold for segmenting the image into background and objects, an image a background area, and an image area greater than or equivalent to the segmentation threshold serves as an object area; effective grayscale levels in the background and object areas are counted and ordered; and according to the order of the grayscale levels, the grayscale levels of the background and object areas are compressed and extended within certain grayscale level range in an equidistant way, and an enhanced image is obtained. According to the invention, the background of the infrared grayscale image is compressed, the objects are enhanced, details are emphasized, and the method is suitable for conditions that the object temperature is different from the background temperature.

Description

technical field [0001] The invention relates to the field of digital image processing, in particular to an infrared image enhancement method. Background technique [0002] Infrared thermal images can reflect the amount of radiant energy on the surface of an object. Any object in nature will radiate energy outward. The relationship between the amount of radiant energy and temperature of an object is Q=εT n , where ε is the emissivity of the surface of the object, and n is a constant, which is related to the material of the detector of the thermal imager, the infrared image generation device, so the infrared thermal image can also reflect the temperature distribution on the surface of the object. Due to the interference of the background environment and the noise of the thermal imager itself, the visibility of the infrared image is not high, the detail of the target image is poor, and there is little temperature information that can be intuitively reflected. Therefore, the inf...

Claims

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Application Information

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IPC IPC(8): G06T5/40G06T7/11G06T7/136G06T7/194
CPCG06T5/40G06T2207/10048
Inventor 陈乐张雪英富雅琼吾云霞
Owner CHINA JILIANG UNIV
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