Filtering method for vertical stripe noise of uncooled infrared video image

Abstract

The invention discloses a filtering method for vertical stripe noise of an uncooled infrared video image, which mainly comprises a vertical stripe noise judgment step and a vertical stripe noise filtering step, and specifically includes: calculating span average relative error by taking polynomial fitting data as a reference,and carrying out the vertical stripe noise judgment; carrying out band elimination filtering processing on the amplitude spectrum value corresponding to the vertical stripe noise to obtain a new amplitude spectrum, carrying out two-dimensional Fourier inverse transformation on the new amplitude spectrum and the phase spectrum to obtain a new image, and carrying out transverse one-dimensional adaptive median filtering processing on the new image; and carrying out mean filtering and histogram equalization processing on the image after median filtering to obtain a denoised image. The vertical stripe noise defect existing in a traditional detector can be eliminated, circuit optimization and detector replacement are not needed, and the cost and design difficulty of the detector and hardware are reduced. Through the image processing method, the vertical stripe noiseof the image can be accurately and efficiently removed, and the imaging quality of the infrared video is improved.

Description

technical field [0001] The invention relates to a method for filtering vertical stripe noise of an uncooled infrared video image, and belongs to the technical field of high-sensitivity infrared imaging processing. Background technique [0002] With the rapid development of computer technology and video graphics and image technology, infrared video processing technology has been widely used in video surveillance systems in the military field. Among them, the uncooled infrared detector does not require additional environmental temperature control equipment, making its application cost Compared with the cooling type detector, the application environment will be more extensive. [0003] Due to the hardware design of the uncooled detector and the defects of the detector itself, it is necessary to perform non-uniformity correction and two-point correction on the pixel signal output by the detector. Under high and low temperature conditions, because the response characteristics of...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the above-mentioned deficiencies in the prior art, aiming at the problems such as the loss of image details due to the lack of traditional denoising, and proposes a filtering method for vertical stripe noise in uncooled infrared video images

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