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Non-uniformity correction method and device

A non-uniformity correction and non-uniformity technology, applied in the field of image processing, can solve the problems of infrared image blur, image edge blur, artifacts, etc., and achieve the effect of avoiding image edge blur and accurate non-uniform feature information.

Active Publication Date: 2020-03-10
ZHEJIANG UNIVIEW TECH CO LTD
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  • Claims
  • Application Information

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Problems solved by technology

However, using this algorithm to process the results, first, as the number of iterations increases, the infrared image will become more and more blurred, and the stationary target will gradually blend into the background; In the process of moving from stillness, "artifacts" will appear; the third is that due to the dependence on adjacent pixels in the scene, the correction effect on low-frequency information in non-uniformity is not very good, and there is a negative effect on blurring the edge of the image "influences"

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no. 1 example

[0034] The present invention provides a method for correcting non-uniformity, which is applied to an image processing device 100 and used for correcting non-uniformity of an infrared image. see figure 2 , is a flowchart of a non-uniformity correction method provided by an embodiment of the present invention. The non-uniformity correction method includes:

[0035] Step S201: Perform preprocessing on the acquired original image to obtain original image information, detail image information and base layer image information.

[0036] It should be noted that the original image is an infrared image collected and transmitted by an infrared thermal imaging detector; the detailed image information is the high-frequency information in the preprocessed original image, that is, the edge corresponding to the preprocessed original image The detail information; the base layer image information is the low-frequency information in the preprocessed original image, that is, the contour inform...

no. 2 example

[0078] see Figure 5 , Figure 5 A functional block diagram of a non-uniformity correction device 200 provided for a preferred embodiment of the present invention. It should be noted that the basic principles and technical effects of the non-uniformity correction device 200 provided in this embodiment are the same as those of the above-mentioned embodiments. Corresponding content in the embodiment. The non-uniformity correction device 200 includes: a pre-processing unit 210 , a non-uniformity feature extraction unit 220 , an up-sampling unit 230 and a pixel response fitting unit 240 .

[0079] Wherein, the preprocessing unit 210 is used for preprocessing the acquired original image to obtain original image information, detail image information and base layer image information.

[0080] Specifically, the preprocessing unit 210 is configured to extract the first detailed image information based on the original image and a preset filtering algorithm, and extract the first base...

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Abstract

The embodiment of the invention provides a non-uniformity correction method and device, and relates to the technical field of image processing. The method comprises the following steps: preprocessingan acquired original image to acquire original image information, detail image information and base image information; determining non-uniformity feature information based on the base image information, the detail image information and the original image information; performing reverse mapping processing on the non-uniformity feature information to obtain a non-uniformity prediction result of eachpixel; and finally, performing smoothing processing on each non-uniformity prediction result based on a preset pixel response fitting algorithm to obtain an output image. Since the non-uniformity feature information is extracted based on the base image information, the detail image information and the original image information, the non-uniformity feature information is more accurate; meanwhile,data iteration is not needed in the whole prediction process, and therefore it is guaranteed that the obtained output image is always in a clear state.

Description

technical field [0001] The present invention relates to the technical field of image processing, in particular, to a non-uniformity correction method and device. Background technique [0002] Due to the limitations of technology and materials, in different working environments, infrared thermal imaging detectors will show completely inconsistent pixel responses when facing the same thermal radiation scene. The image needs to be corrected for non-uniformity of the original thermal radiation image collected. [0003] In the prior art, traditional neural network correction methods are mainly used. The traditional neural network correction method mainly adopts the linear response model of the pixel, assuming that the response of each pixel in a certain temperature range is a linear relationship, and its correction principle is to use the existing field of view scene to continuously carry out the detection of the detection element. Correction for gain and offset. However, usin...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J5/00
CPCG01J5/00G01J2005/0077G01J5/80
Inventor 樊晓清
Owner ZHEJIANG UNIVIEW TECH CO LTD