An Adaptive Infrared Image and Video Vertical Grain Removal Method Based on Image Blocking

An infrared image and image segmentation technology, which is applied in the field of adaptive infrared image and video vertical stripe removal, can solve problems such as image edge side effects, unfavorable hardware implementation, vertical stripe residue, etc., achieve high real-time performance, eliminate visual impact, eliminate The effect of vertical noise

Active Publication Date: 2022-03-04
西安中科立德红外科技有限公司
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Problems solved by technology

[0006] The purpose of the present invention is to solve the technical problems of the existing infrared vertical stripe removal method, which has a large amount of calculation, is not conducive to hardware implementation, or has vertical stripe residue and image edge side effects, and provides an adaptive infrared image and video image based on image segmentation. Vertical lines removal method

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  • An Adaptive Infrared Image and Video Vertical Grain Removal Method Based on Image Blocking
  • An Adaptive Infrared Image and Video Vertical Grain Removal Method Based on Image Blocking
  • An Adaptive Infrared Image and Video Vertical Grain Removal Method Based on Image Blocking

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[0096] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0097] For infrared images, an adaptive infrared image vertical streak removal method based on image segmentation is adopted, including the following steps:

[0098] 1) Preprocess the collected infrared images to preliminarily eliminate non-uniform noise and blind pixel points. There are many preprocessing methods, including but not limited to non-uniform correction and blind pixel compensation. The preprocessed image is used as vertical lines The input image p of the removal method;

[0099] 2) Perform low-pass guided filtering on the input image p to smooth the noise, weaken the numerical expression of the noise, and obtain the filtered result image q. The principle of guided filtering is to solve the optimal solution of the least squares formula, that is, assuming the input image On the premise of local linear correlation with the expected output im...

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Abstract

The invention relates to an infrared digital image processing method, in particular to an image block-based adaptive infrared image and video vertical stripe removal method. The purpose of the present invention is to solve the technical problems that the existing infrared vertical stripe removal method has a large amount of calculation, is not conducive to hardware implementation, or has residual vertical stripes and side effects of image edges. By obtaining the preprocessed image frame data, filter the image data, block the image before and after filtering, and use the one-dimensional noise feature distribution of each image block in the column direction to perform adaptive image edge evaluation to obtain vertical lines The amount of superimposed noise, and correct the median value in units of columns as the final amount of superimposed vertical noise of the column, and then use the final amount of superimposed vertical noise to eliminate vertical lines on the original image in units of columns. This method can suppress the marginal side effects brought by the traditional algorithm, the algorithm complexity is low, and it has high real-time performance and engineering realization.

Description

technical field [0001] The invention relates to an infrared digital image processing method, in particular to an image block-based adaptive infrared image and video vertical stripe removal method. Background technique [0002] In an infrared imaging system, the same column of pixels usually shares the same output circuit in the readout circuit of the infrared detector. Since the bias voltages of the column output circuit and the row output circuit are not completely consistent, the main feature of the image will be vertical lines. The non-uniform noise, that is, the vertical noise. Because the vertical streak noise is one of the manifestations of infrared non-uniformity, the traditional correction method based on calibration or scene can suppress the vertical streak noise to a certain extent, but the residual vertical streak noise still has a large visual impact on the image. influences. [0003] In addition to the traditional infrared correction algorithm, there are two m...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T5/00G06T5/50
CPCG06T5/002G06T5/50G06T2207/10048G06T2207/20024
Inventor 宋洁王鹏刘伟段程鹏张帆杨遥
Owner 西安中科立德红外科技有限公司
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