SAR image synthesis method for enhancing target characteristics

Abstract

The invention provides an SAR image synthesis method for enhancing target characteristics. According to the method, an SAR image and an optical image are effectively utilized for conducting synthesis, and therefore the target characteristics are enhanced. According to the technical scheme, the method comprises the steps of firstly obtaining the optical image and the SAR image shot from the same scene, conducting color preprocessing on the optical image through a color conversion module in a computer, utilizing a constant false-alarm for detecting high bright spots in the SAR image, conducting region merging on the bright spots, then, utilizing target prior information and the characteristics for completing detection post-processing, removing the false alarm, dividing the SAR image into a target region and a background region, utilizing the SAR image target position information by an optical image target characteristic extracting module for extracting a target region and the target characteristics of the optical image, finally, conducting three-channel color image synthesis on the SAR image and the optical image through an image synthesis module, and overlaying the extracted target edge of the optical image to the synthesis image for generating a final synthesis image.

Description

technical field [0001] The invention relates to a target image synthesis technology in the field of image processing, in particular to a SAR image synthesis method for target feature enhancement. Background technique [0002] In recent years, the maturity of synthetic aperture radar (SAR) imaging technology has made it an important means of earth observation. SAR has the characteristics of all-weather and all-time imaging, and can find targets hidden in bushes, haystacks, and under the surface. Compared with optical and infrared images, the quality of SAR imaging is less affected by climate and day and night factors, but it also has disadvantages such as low image resolution, and the images are not easy to interpret by human eyes. [0003] Image synthesis technology combines images detected by multiple sensors in a specific way to provide clearer image detail information. Optical imaging has a high resolution and can obtain richer color, shape and texture information. The...

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Problems solved by technology

[0011] The above method is mainly carried out for image pixels, does not have obvious target indication characteristics, and does not give full play to the advantages of SAR image target detection capabilities

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