A dodging algorithm for large-scale spaceborne SAR images

Binyuan Liu; Mingxin Lin; Haisong Weng; Qingsong Wang

doi:10.1117/12.3004984

20 October 2023 A dodging algorithm for large-scale spaceborne SAR images

Binyuan Liu, Mingxin Lin, Haisong Weng, Qingsong Wang

Proceedings Volume 12916, Third International Conference on Signal Image Processing and Communication (ICSIPC 2023); 129160L (2023) https://doi.org/10.1117/12.3004984
Event: Third International Conference on Signal Image Processing and Communication (ICSIPC 2023), 2023, Kunming, China

Abstract

Achieving high-quality output if large-scale SAR image stitching demands color balancing of the images to be stitched. However, adjacent SAR images may exhibit large differences in radiation intensity, particularly in the context of different-track SAR images. Furthermore, the diverse sizes and uneven spatial distribution of SAR images from different sources pose a challenge for color balancing in image stitching. To alleviate these issues, we propose a large-scale multi-track spaceborne SAR image dodging stitching scheme based on the working characteristics of spaceborne SAR. We leverage different algorithms for along-track and across-track SAR image dodging, based on the statistical characteristics of the overlap region and block processing, to ensure uniform luminance and contrast in the color-balanced stitched images. We introduce an evaluation metric to assess the extent of contrast preservation between the images before and after dodging. In our experiments, we utilize 116 Gaofen-3 and Sentinel-1 SAR images for dodging stitching and compare our proposed method to traditional dodging methods. The proposed method outperforms traditional methods both in terms of visual effects and evaluation metrics.

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Binyuan Liu, Mingxin Lin, Haisong Weng, and Qingsong Wang "A dodging algorithm for large-scale spaceborne SAR images", Proc. SPIE 12916, Third International Conference on Signal Image Processing and Communication (ICSIPC 2023), 129160L (20 October 2023); https://doi.org/10.1117/12.3004984

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KEYWORDS

Synthetic aperture radar

Image processing

Image filtering

Tunable filters

Histograms

Image information entropy

Visualization

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