An intelligent color enhancement method for high-resolution remote sensing images of the coastal zone of an island

doi:10.6046/zrzyyg.2023010

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Abstract

The original high-spatial-resolution remote sensing images of coastal zones of islands often exhibit a gray tone, color cast, and indistinguishable surface feature information. In response to the increasing demand for geographic information security of coastal zones of islands, this study aims to obtain timely clear remote sensing images with rich information, moderate contrast, and uniform brightness for island reefs. Hence, it proposed an intelligent color enhancement method by combining deep learning with improved histogram matching for high-spatial-resolution remote sensing images of coastal zones of islands. First, data resampling and adaptive chunking were performed to obtain thinned images. Then, the MBLLEN network was applied to enhance the thinned images with true color. Finally, an improved histogram matching method was employed for color mapping of original images, obtaining remote sensing images with consistent colors and rich details conforming to human vision. The color-matching effects of these obtained remote sensing images were evaluated using both subjective and objective methods. The results show that compared to other commonly used color-matching methods like Retinex, HE, and MASK, the method proposed in this study yielded more satisfactory results characterized by consistent colors and rich details conforming to human vision. Therefore, the proposed method can effectively improve the visual effects of high-spatial-resolution remote sensing images of coastal zones of islands, effectively retain the details of original surface features, and significantly enhance color-matching efficiency.

Keywords remote sensing image of the coastal zone of an island MBLLEN histogram matching color mapping

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TP79

Issue Date: 14 June 2024

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	Articles by authors

	Binru ZHAO
	Siwen NIU
	Liyan WANG
	Xiaotong YANG
	Hongbo JIAO
	Zike WANG

Cite this article:

Binru ZHAO,Siwen NIU,Liyan WANG, et al. An intelligent color enhancement method for high-resolution remote sensing images of the coastal zone of an island[J]. Remote Sensing for Natural Resources, 2024, 36(2): 70-79.

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https://www.gtzyyg.com/EN/10.6046/zrzyyg.2023010 OR https://www.gtzyyg.com/EN/Y2024/V36/I2/70

Fig.1 Location of the study area

Fig.2 General flow chart of technology

Fig.3 Image resampling and adaptive blocking

Fig.4 MBLLEN network structure

Fig.5 Partial minimum object of interest color unit

Fig.6 Contrast of true color enhancement effect of thinning image

Fig.7 Comparison of results before and after high resolution image tinting

Fig.8-1 Images and histograms before and after color scale compensation in some areas

Fig.8-2 Images and histograms before and after color scale compensation in some areas

Tab.1 Comparison of color matching results using different methods

Tab.2 Evaluation indicators for color mixing results of different algorithms

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