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A Real-time Elimination Method of Stripe Noise in Infrared Video Image

An infrared image and video image technology, applied in image enhancement, image analysis, image data processing and other directions, can solve the problems of interrupted shooting process, artifacts, etc., to eliminate stripe noise, less calculation, and good denoising effect. Effect

Inactive Publication Date: 2019-05-31
XIAN UNIV OF SCI & TECH
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Problems solved by technology

Calibration-based noise removal methods need to correct parameters using a black body (object with the same temperature everywhere) during the shooting process, thus interrupting the shooting process
Scene-based noise removal methods only use continuously captured scene image sequences to estimate correction parameters, but are prone to "artifact" phenomena

Method used

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  • A Real-time Elimination Method of Stripe Noise in Infrared Video Image
  • A Real-time Elimination Method of Stripe Noise in Infrared Video Image

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Embodiment Construction

[0030] Such as figure 1 and figure 2 Shown, the present invention comprises a kind of infrared video image stripe noise real-time elimination method, comprises the following steps:

[0031] Step 1. Input the first frame of infrared image: input the first frame of infrared image Y with stripe noise 1 (i,j), where the first frame of infrared image Y 1 The pixels of (i,j) are M×N, i=1,2,...,M and j=1,2,...,N;

[0032] In this embodiment, the infrared image Y s The pixels of (i, j) are all M×N.

[0033] It should be noted that the infrared video data is continuously input by the video acquisition module 1, and the infrared video data is collected and output in units of frames. The pixels of the infrared image in each frame are M×N, and the infrared image of the pixels M×N indicates that the image contains M lines, each line has N pixels, in actual use, the video acquisition module 1 includes an infrared focal plane detector, and the data processing module 2 is a computer, a ...

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Abstract

The invention discloses a real-time elimination method of strip noise in infrared video images, which includes the following steps: 1. Input the first frame of infrared image; 2. Initialize the correction parameters; 3. Correction of the current frame of infrared image and output of the corrected image: 301. Set the number of iterations K and iterative correction number k, 302. Calculate the sth frame infrared image Y s (i, j) The infrared image after the kth correction, 303. Calculate the sth frame infrared image Y s (i, j) Modulus of the gradient of the infrared image after the kth correction, 304. Update the correction parameter G (s‑1)K+k (j) and O (s‑1)K+k (j), 305. Determine whether k < K holds; 4. Input the next frame of infrared image; 5. Loop through steps three to four multiple times to correct and output the continuously input infrared video data in real time. The method requires a small amount of calculation for processing each frame of infrared image, saves video image correction time, and is suitable for real-time denoising of infrared video images.

Description

technical field [0001] The invention belongs to the technical field of video image denoising, and in particular relates to a method for real-time elimination of strip noise in infrared video images. 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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T5/00
CPCG06T2207/10048G06T2207/10016G06T5/70
Inventor 王书朋
Owner XIAN UNIV OF SCI & TECH
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