A pseudo-color synthesis method and device for dual-polarization SAR images

Abstract

The embodiments of the present invention disclose a pseudo-color synthesis method for the images of an SAR (synthetic aperture radar) under a dual-polarization mode. The method includes the following steps that: relationship models of a plurality of channels corresponding to different surface features are established; surface feature types corresponding to two channel data of the SAR (synthetic aperture radar) under the dual-polarization mode which are obtained currently; a relationship model corresponding to the determined surface feature types is obtained, the other channel data of the SAR under a complete-polarization mode are constructed according to the two channel data and the determined surface feature types; and pseudo-color synthesis is performed according to a preset first algorithm, the two channel data and the constructed other channel data of the SAR under the complete-polarization mode. The embodiments of the invention also disclose a pseudo-color synthesis device of the images for an SAR (synthetic aperture radar) under a dual-polarization mode. With the pseudo-color synthesis method and device for the images of the SAR (synthetic aperture radar) under the dual-polarization mode of the invention adopted, the colors of the images of the SAR under the dual-polarization mode can be enriched, and the distinguishing degree of different surface features in the images can be improved.

Description

technical field [0001] Embodiments of the present invention relate to the field of radar technology, in particular to a pseudo-color synthesis method and device for dual-polarization SAR images. Background technique [0002] Compared with optical imaging in the field of remote sensing, synthetic aperture radar (SAR) has the advantages of all-time, all-weather, penetrability, and high imaging resolution. It is a very effective remote sensing method that can Complementing with optical imaging means, it can effectively observe the target. Polarization SAR uses different polarization methods to alternately transmit and receive radar signals, so that the radar system can obtain rich information on the scattering characteristics of ground objects. Scattering characteristics, to obtain the polarization complex scattering matrix that reflects the inherent characteristics of ground objects, so as to analyze, extract and invert target features, and obtain better performance in target...

AI Technical Summary

Problems solved by technology

[0004] For dual-polarization SAR, one of the current pseudo-color synthesis methods for dual-polarization SAR images is to classify ground objects first, and then assign different colors to different ground objects. Although this method can distinguish different ground objects to a certain extent, However, the resulting image uses less polarization information; another method is to use two polarization channels and their addition or subtraction of the corresponding RGB three primary color components to achieve pseudo-color synthesis. Although part of the polarization information is used, there is no deep mining. There are two channels of implicit polarization information

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