Infrared image stripe noise filtering method

A stripe noise and infrared image technology, which is applied in image enhancement, image analysis, image data processing, etc., can solve the problems that cannot be filtered out, and achieve the effects of real-time processing, image quality improvement, and low computational complexity

Inactive Publication Date: 2018-03-06
HUBEI JIUZHIYANG INFRARED SYST CO LTD
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Problems solved by technology

[0003] Infrared focal plane detectors generally contain multiple amplifiers, and the output of one row or column of the detector shares one amplifier, so horizontal or vertical non-uniform stripes will be generated. This kind of stripe noise is a special non-uniform noise. Especially in planar imaging systems, ordinary one-point non-uniformity correction or two-point non-uniformity correction methods cannot filter out this kind of noise

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[0040] The present invention will be described in further detail below in conjunction with accompanying drawing and embodiment, the infrared image source of the embodiment of the present invention comes from IRAY 384*288 infrared focal plane detector, and this detector outputs the infrared image of 384*288 resolution, and this image has There is a characteristic of vertical stripe noise, so in this embodiment, only vertical stripe noise filtering is performed on the image.

[0041] refer to figure 1 As shown, the invention discloses a method for filtering infrared image streak noise, comprising the following steps:

[0042] 1) Receive image data

[0043] The unpreprocessed infrared image output by the infrared focal plane detector is called the original image, and the input image received by this method is the preprocessed image data of the original image.

[0044] The preprocessing of the original image in the example of the present invention includes two-point non-uniformi...

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Abstract

The invention discloses an infrared image stripe noise filtering method, which comprises the following steps: 1) receiving image data obtained after preprocessing and output by an infrared focal planedetector; 2) carrying out guide filtering processing on the input image to obtain a base graph of the input image; 3) subtracting the mean value of each row or/and each column of pixels of the inputimage by the mean value of each row or/and each column of pixels of the base graph image to obtain stripe noise superposition amount of each row or/and each column of pixels of the input image; and 4)subtracting the pixel value of the input image by the stripe noise superposition amount of the row or/and the column of the pixels to obtain an output image of the infrared image after stripe noise removal processing. The method can effectively remove horizontal and vertical stripe noise of infrared focal plane imaging, improves image quality, is low in computation complexity and is convenient for realizing real-time processing.

Description

technical field [0001] The invention belongs to the technical field of infrared image processing, and in particular relates to an infrared image stripe noise filtering method. Background technique [0002] Infrared focal plane imaging system is the development direction of infrared imaging technology and the core device of infrared imaging system. Infrared focal plane imaging devices, such as thermal imaging cameras, are often disturbed by various noises, which in turn affect the quality of infrared images. Therefore, in order to improve the visual effect, it is necessary to use filtering technology to process the noise of the infrared image. [0003] Infrared focal plane detectors generally contain multiple amplifiers, and the output of one row or column of the detector shares one amplifier, so horizontal or vertical non-uniform stripes will be generated. This kind of stripe noise is a special non-uniform noise. It is especially prominent in planar imaging systems, and or...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/00G06T5/50
CPCG06T5/002G06T5/50G06T2207/10048G06T2207/20024
Inventor 朱祥路侯良科洪普宫文峰胡志强
Owner HUBEI JIUZHIYANG INFRARED SYST CO LTD
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