Local-correlation-based infrared image stripe noise removing method

A stripe noise, infrared image technology, applied in image enhancement, image analysis, image data processing and other directions, can solve problems such as large amount of calculation, unfavorable hardware implementation, etc., achieve high real-time performance, small amount of calculation, and achieve stripe noise removal. Effect

Active Publication Date: 2017-07-07
武汉镭英科技有限公司
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Problems solved by technology

This scheme can remove the streak noise in the infrared image without losing the original information of the image, but these algorithms have a large amount of calculation, which is not conducive to real-time hardware implementation

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  • Local-correlation-based infrared image stripe noise removing method
  • Local-correlation-based infrared image stripe noise removing method
  • Local-correlation-based infrared image stripe noise removing method

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[0027] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0028] figure 1 It is a flowchart of a method for removing streak noise from an infrared image based on local correlation according to an embodiment of the present invention.

[0029] Such as figure 1 As shown, the method for removing streak noise in an infrared image based on local correlation in the embodiment of the present invention can realize streak removal for any frame image. This method starts from the pre-correction pixels in the first row of a frame of image, and corrects them row by row, and the pixels adjacent to the corrected pixels above and above the same column are used as the ba...

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Abstract

The invention, which belongs to the field of infrared image processing, specifically discloses a local-correlation-based infrared image stripe noise removing method. The method comprises: an expected output value of a pre-corrected pixel point is calculated by one-dimensional horizontal mean filtering; an anticipated output of the pre-corrected pixel is calculated, the pre-corrected pixel point is corrected by using a correction parameter corresponding to one pixel point at the pre-corrected pixel point to obtain an anticipated output; under the circumstance that the quadratic sum of the difference of the expected output and the anticipated output is minimized, adaptive adjustment of the correction parameter is realized by using an inter-column iterative way; the pre-corrected pixel point is corrected by using a new correction parameter; and a next pixel point at a same row is corrected until one frame of image is corrected completely. Therefore, the adjacent element of the current pixel point only needs to be cached and one frame of image does not need to be stored for calculating the statistic characteristic of the image; and with combination of inter-column local correlation of the stripe noise, stripe noise removing of the single-frame image can be realized. The infrared image data flow-line characteristic can be realized well.

Description

technical field [0001] The invention belongs to the field of infrared image processing, and more particularly relates to a method for removing stripe noise in infrared images based on local correlation. Background technique [0002] In the infrared imaging system, the infrared focal plane array usually shares the same output circuit with the pixels in the same column. Since the bias voltage of the row output circuit is not completely consistent, and the output circuit has non-uniformity, the image generated by the infrared imaging system will be uneven. Contains non-uniform noise characterized by streaks, called streak noise. Traditional scene-based non-uniform correction algorithms or calibration-based correction algorithms cannot effectively remove this streak noise. [0003] At present, the methods to solve the streak noise in infrared images are mainly divided into two categories: one is the removal algorithm based on statistical features, this type of algorithm often a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/00
CPCG06T5/002G06T2207/10048G06T2207/20024
Inventor 梁琨周波
Owner 武汉镭英科技有限公司
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