A fusion method of sar image and optical image based on hsl and image entropy

Abstract

The invention discloses a method for fusion of SAR images and optical images based on HSL and image entropy. The method comprises: step 1) reading in the SAR image I to be fused SAR and Optical Image I OPT , the optical image I OPT Convert the RGB model to the HSL model to obtain the chroma component H, the saturation component S and the brightness component L; step 2) for the read-in SAR image I SAR And the optical image brightness L that obtains, carry out normalization processing respectively, obtain and step 3) be based on and calculate the image entropy parameter E that reflects SAR image and optical image information amount SAR and E OPT ; Step 4) based on the image entropy parameter E SAR and E OPT , calculate the normalized weights α and β, and use them to perform linear weighted summation to obtain the brightness component L of the fused image FUSE ; Step 5) combine chroma H, saturation S and lightness L FUSE combined to construct the fusion image I FUSE HSL model and convert it to RGB model output. The method of the invention has remarkable effects, simple operation, and does not require human intervention and intervention.

Description

technical field [0001] The invention relates to a multi-source image fusion method, in particular to a SAR image and optical image fusion method based on HSL and image entropy. Background technique [0002] There are essential differences between SAR imaging and optical imaging (literature [1]: D.Li, Y. Zhang. Epipolarometry comparison of SAR and optical camera. Proceedings of SPIE, vol.9901, no.9910V, pp.1-9, 2016). SAR actively emits microwaves to detect the scattering of targets, and optical cameras passively receive them to record the reflection of visible light from targets. Differences in imaging methods, observation geometry, and frequency bands make SAR imaging a coherent measurement, and optical imaging an incoherent measurement (literature [2]: Y. Zhang, J. Jiang. Why optical images are easier to understand than radar images? – From the electromagnetics cattering and signal point of view. Proceedings of PIERS, Guangzhou, China, 2014, pp.1411-1415). The former ca...

AI Technical Summary

Problems solved by technology

[0003] So far, there have been many methods for fusing SAR images and optical images, such as wavelet transform fusion method, information entropy fusion method, etc. poor versatility

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