Abstract
The underwater imaging could be severely degraded by the scattering media because of the backscattered light and signal attenuation, especially in the case of strong scattering for dense turbid medium. In this paper, we propose an improved method for recovering the underwater image combining the histogram stretching and polarimetric recovery in a proper way. In this method, we stretch the histograms of the orthogonal polarization images while maintaining the polarization relation between them, and then, based on the processed orthogonal polarization images, the recovered image with higher quality can be obtained by the traditional polarimetric recovery method. Several groups of experimental results demonstrate that the quality of underwater images can be effectively enhanced by our method, and its performance is better than that of the traditional polarimetric recovery method. In particular, the proposed method is also quite effective in the condition of dense turbid medium.
Highlights
Due to the scattering and absorption by the particles existing in water, the underwater image could be blurred and the image quality is reduced[1,2,3,4,5,6,7,8]
The traditional polarimetric recovery method proposed by Schechner et al.[17,18] is found to be an effective way to enhance the quality of hazy images in turbid medium, which recovers the image based on two images captured at orthogonal polarization states
We propose an improved method for underwater image recovery combining histogram stretching and polarimetric recovery in a proper way, which can significantly enhance the quality of underwater imaging
Summary
Due to the scattering and absorption by the particles existing in water, the underwater image could be blurred and the image quality is reduced[1,2,3,4,5,6,7,8]. The traditional polarimetric recovery method proposed by Schechner et al.[17,18] is found to be an effective way to enhance the quality of hazy images in turbid medium, which recovers the image based on two images captured at orthogonal polarization states. Recovery method has not been considered yet, and we believe a proper combination of them could enhance the image quality more effectively, especially for the dense turbid medium. The range of gray level of the image is compressed into a narrow band in turbid medium, especially in the condition of dense turbid medium In this case, we propose an improved method for recovering the underwater image based on a proper combination of histogram stretching and polarimetric recovery. Several groups of experiments for different scenes and with different densities of turbid medium are performed, especially for the dense turbid medium, which verify the superiority and effectiveness of our method
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