Synthetic aperture radar image noise-eliminating method based on independent component analysis based image

Abstract

The present invention relates to a denoising method of a synthesizing aperture radar image based on an independent component analysis basis image in the image processing technical field. First, the original image is sampled and an initial matrix is gained, and the equalizing value removal and whiten operation is performed, then the processing result is disposed as the input matrix of the single component analysis method, and the single component analysis method is performed, and a basis vector aggregation of the original image and the single component are gained; then the basis vector is converted into a relative basis image, and disposed in two steps by adopting the basis image as the object: step 1, the multifractal Herder exponent is adopted as the cost function to make the smooth enhance to the basis image; step 2, according to the signal separation concept, the separation criterion is proposed, the enhanced basis image is separated, and the basis image aggregation relative to the non noise signal is separated. The non noise basis image and the relative encoder matrix are reconstructed to gain the final denoising image. The present invention realizes the compromise between the SAR image noise removal and the useful information reservation, and gains good denoising performance.

Description

technical field [0001] The invention relates to a method in the technical field of image processing, in particular to a synthetic aperture radar image denoising method based on an independent component analysis base image. Background technique [0002] Synthetic Aperture Radar (SAR) is a high-resolution microwave remote sensing imaging radar that works around the clock. Moving and static target interception and recognition, interferometry and camouflage recognition and detection, etc. Its advantages lie in its high resolution, its ability to work around the clock, and its ability to effectively identify camouflage and penetrate cover. Since the synthetic aperture radar is a coherent imaging radar working in the microwave band and uses a coherent microwave source for irradiation, the echoes of each scattering point are coherently superimposed, and the amplitude and phase have a great relationship with the direction of the echo. When the coherent electromagnetic wave irradia...

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Problems solved by technology

Although it surpasses the method of spatial filtering to a certain extent, it requires statistical analysis and does not pay attention to the mining of base image information related to encoding.

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