Method for translating SAR image into optical image

Abstract

The invention discloses a method for translating an SAR image into an optical image. The method includes the following steps that: a translation knowledge base is built; preprocessing and feature extraction are performed on an SAR image to be translated; characteristics and a classification algorithm are utilized to carry out image classification, the types of surface features are marked; the mapping relationship between the SAR image to be translated and a target image surface feature is determined according to a classification result; a target expression method is adopted to perform conversion and re-expression of a surface feature target on the SAR image to be translated according to a translation rule and a target sample provided by the translation knowledge base; and an optical image obtained through translation is outputted. The method of the invention has the advantages of reasonable process, high efficiency of the algorithm, little man-machine interaction and excellent translation effect. With the method of the invention adopted, a translation result image is as consistent as possible with an SAR image in the aspect of maintaining surface feature spatial structure information, and the translation result image is very close to a target image in aspects such as spectrum, hue and texture features.

Description

technical field [0001] The invention belongs to the technical field of surveying and mapping remote sensing, and in particular relates to a method for translating SAR images into optical images. Background technique [0002] Restricted by various factors such as observation platforms, electromagnetic wave wavelengths, weather, and sensor materials, remote sensing data acquisition and processing technologies are still insufficient. For example, optical sensors can acquire visible light images with high resolution and obvious visual features, but their imaging is easily affected by external conditions such as time and cloud cover. Although Synthetic Aperture Radar (SAR) has the advantages of all-weather, all-weather, multi-band, multi-polarization, and strong penetration capabilities, it has a wide range of uses in military, industrial, and civilian applications, but SAR images are not as intuitive as optical images. It is easy to understand and difficult to interpret, which ...

AI Technical Summary

Problems solved by technology

However, the translation of SAR images and optical images is still a new research direction, and so far no relevant research results have appeared at home and abroad.

In addition, the data organization, expression form and interpretation method involved in remote sensing image translation are completely different from the organization and expression of language and text, so the method of language translation is difficult to directly apply to image translation

So far there is no effective technology for translating SAR images into optical images

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