Single-frame infrared non-uniformity detection method based on inverse perception in Fourier domain

Abstract

The invention discloses a single-frame infrared non-uniformity detection method of reverse perception in the Fourier domain, which decomposes the original single-frame infrared image into several weighted non-overlapping image sub-blocks, and performs Fourier-logarithmic transformation on them , to obtain the Fourier energy spectrum under the corresponding logarithmic domain of each weighted non-overlapping image sub-block; calculate the minimum Fourier energy spectrum from the Fourier energy spectra of the several weighted non-overlapping image sub-blocks; according to the The above minimum Fourier energy spectrum is used to determine the number of false alarms that may appear inhomogeneous characteristics based on the reverse perception theory, and then construct a binary map that can represent the distribution of the non-uniform Fourier energy spectrum according to the number of false alarms and the selected empirical threshold ; filter the Fourier energy spectrum of the original single-frame infrared image according to the binary mapping, and obtain the non-uniformity detection result of the infrared image through inverse Fourier transform. The invention is based on the spectral distribution characteristics of the Fourier domain of the image, and uses the reverse perception theory of the human visual system to realize the non-uniformity detection of the infrared image, so as to achieve the effect of improving the image quality of the single-frame infrared image.

Description

technical field [0001] The invention belongs to the field of infrared image processing, and in particular relates to a single-frame infrared non-uniformity detection method of reverse perception in the Fourier domain. Background technique [0002] The successful development and application of a new generation of staring infrared imaging systems is mainly due to the use of its internal core device - infrared focal plane array; however, due to the limitations of manufacturing processes, device materials, working environment and other factors, the Each detection unit has the problem of inconsistent and non-uniform photoelectric response under the same irradiance, which makes the infrared image generated by the imaging system contain obvious fixed pattern noise, which seriously affects the imaging quality of the system; therefore, the detector pixel It is an important work that must be carried out in the entire infrared imaging chain to perform non-uniformity correction on the o...

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Problems solved by technology

[0002] The successful development and application of a new generation of staring infrared imaging systems is mainly due to the use of its internal core device - infrared focal plane array; however, due to the limitations of manufacturing processes, device materials, working environment and other factors, the Each detection unit has the problem of inconsistent and non-uniform photoelectric response under the same irradiance, which makes the infrared image generated by the imaging system contain obvious fixed pattern noise, which seriously affects the imaging quality of the system; therefore, the detector pixel Or original infrared image non-uniformity correction is an important work that must be carried out in the entire infrared imaging chain

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