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Elimination method for eliminating stripe noise of infrared image

An infrared image and noise removal technology, applied in the field of image denoising, can solve the problems of inability to completely eliminate stripe noise, large amount of calculation, etc., and achieve the effect of easy popularization, effective iteration times, and solving stripe noise problems.

Inactive Publication Date: 2017-06-09
XIAN UNIV OF SCI & TECH
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Problems solved by technology

However, this method is computationally intensive and cannot completely eliminate the streak noise

Method used

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  • Elimination method for eliminating stripe noise of infrared image
  • Elimination method for eliminating stripe noise of infrared image
  • Elimination method for eliminating stripe noise of infrared image

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[0029] Such as figure 1 and figure 2 Shown, the present invention comprises a kind of infrared image stripe noise elimination method, comprises the following steps:

[0030] Step 1. Input the original infrared image: input an original infrared image Y(i,j) with streak noise, the original infrared image Y(i,j) has M×N pixels, where i=1,2, ..., M and j = 1, 2, ..., N;

[0031] It should be noted that an infrared image with M×N pixels indicates that the image contains M rows, and each row has N pixels. In this embodiment, an infrared image with 288×384 pixels is collected by the image acquisition module 1 and transmitted to the image processing Process in module 2. In actual use, image acquisition module 1 includes an infrared focal plane detector, and image processing module 2 is a computer, a high-speed microcontroller or a field programmable gate array. The infrared focal plane array of the infrared focal plane detector usually adopts Column output mode, that is, a readout...

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Abstract

The invention discloses an elimination method for eliminating the stripe noise of an infrared image. The method comprises the following steps of 1, inputting an original infrared image; 2, setting an iteration times K, an iteration sequence number K and conducting the iteration initialization; 3, calculating an infrared image X k (i, j) after the k correction process; 4, calculating the module (img file = 'DDA 0001218487710000011. TIF 'wi = '172 'he = '79' / ) of the infrared image gradient after the k correction process; 5, updating correction parameters Gk(j) and Ok(j); 6, judging whether the condition of k < K is satisfied or not; 7, outputting a final infrared image XK (i, j). The method of the invention is novel in design and simple in step. For the stripe noise generation mechanism of the infrared image, correction parameters are estimated through minimizing the energy function of a correction image. Meanwhile, the stripe noise of the image is corrected through linear transformation. Therefore, the stripe noise of the image can be eliminated only by utilizing the infrared image itself. In this way, the periodic calibration of a focal plane array by means of a black body is not required. On the premise that the stripe noise of the infrared image is effectively eliminated, the blurring phenomenon of image details is avoided. The method is small in calculation amount, good in real-time performance and convenient to popularize and use.

Description

technical field [0001] The invention belongs to the technical field of image denoising, and in particular relates to a method for eliminating streak noise in an infrared image. Background technique [0002] Infrared imaging systems can capture infrared information that cannot be seen by the human eye, and have important application values ​​in the fields of industry, medicine, and military affairs. Infrared focal plane array is the mainstream technology used in the current infrared imaging system, which has the advantages of small size, low manufacturing cost and high sensitivity. Infrared focal plane arrays usually adopt a column output mode, that is, a readout circuit reads the responses of sensors located in the same column in the focal plane array. Since the readout circuits are never identical, this difference can produce noticeable streaky fixed-pattern noise in the infrared image. In order to remove striped fixed pattern noise, there are mainly two types of methods:...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/00
CPCG06T2207/10048G06T5/70
Inventor 王书朋
Owner XIAN UNIV OF SCI & TECH
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