Method for enhancing edges of synthetic aperture radar images

A synthetic aperture radar, image edge technology, applied in image enhancement, image data processing, instruments, etc., can solve the problems of limited effect, unable to obtain satisfactory edge enhancement results, etc., achieve improved effect, is conducive to edge detection and extraction, sharpening The effect of changing edge strength

Inactive Publication Date: 2013-12-18
INST OF ELECTRONICS CHINESE ACAD OF SCI
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Problems solved by technology

[0004] It can be seen that the above-mentioned methods in the prior art all increase the amplitude of the original high-frequency components in the image, and do not generate new high-frequency components, and the speckle noise of the synthetic aperture radar image is a typical multiplicative characteristic, and these edge enhancement methods are very effective. Limited, unable to get satisfactory edge enhancement results

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  • Method for enhancing edges of synthetic aperture radar images
  • Method for enhancing edges of synthetic aperture radar images
  • Method for enhancing edges of synthetic aperture radar images

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[0018] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0019] It should be noted that, in the drawings or descriptions of the specification, similar or identical parts all use the same figure numbers. The implementations that are marked for simplification or convenience in the drawings, and not shown or described in the drawings, are forms known to those of ordinary skill in the art. Additionally, while illustrations of parameters including particular values ​​may be provided herein, it should be understood that the parameters need not be exactly equal to the corresponding values, but rather may approximate the corresponding values ​​within acceptable error margins or design constraints.

[0020] The method for enhancing the edge of a synthetic aperture radar image of the pre...

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Abstract

The invention discloses a method for enhancing the edges of synthetic aperture radar images. The method includes computing each pixel in an original synthetic aperture radar image to obtain normalized average ratios of the pixels; using the normalized average ratio of each pixel in the original synthetic aperture radar image as a gray value of the pixel and redrawing a synthetic aperture radar image. The method has the advantages that the average ratios of a sequence are optimized to obtain the gray values of corresponding elements, so that the synthetic aperture radar image can be redrawn, and the strength of the edges of the synthetic aperture radar image is enhanced.

Description

technical field [0001] The invention relates to the technical field of radar image processing, in particular to a method for edge enhancement of a synthetic aperture radar image. Background technique [0002] With the increasing application of Synthetic Aperture Radar (SAR) images, how to extract the edge information of SAR images has become a key issue in the interpretation of SAR images. It has become an important content of SAR image processing to enhance the visual effect by enhancing the edge of SAR image for subsequent application. [0003] Due to the coherent imaging of synthetic aperture radar images, its inherent speckle noise greatly affects the edge information on the image, so it is difficult for conventional image edge extraction algorithms to extract effective edge information, such as the spatial domain method that directly processes the original image , including Laplacian sharpening, image multi-scale edge enhancement, etc., and transforming the original im...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/00
Inventor 尤红建张翰墨
Owner INST OF ELECTRONICS CHINESE ACAD OF SCI
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