L-CLAHE Intensification Filter (L-CIF) Algorithm for Underwater Image Enhancement and Colour Restoration

Contrast degradation due to wavelength-based light attenuation compromises quality of sub-aquatic images. In this paper, L-CLAHE Intensification Filter (L-CIF) algorithm is proposed to improve the quality of underwater images and to enhance underwater images in pre-processing stages. The proposed al...

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Bibliographic Details
Published in2019 International Symposium on Ocean Technology (SYMPOL) pp. 117 - 128
Main Authors Dhanya, P. R., Anilkumar, Syamily, Balakrishnan, Arun A., Supriya, M. H.
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.12.2019
Subjects
Bilateral Filter
CLAHE
Filtering
Filtering algorithms
Gamma correction
Histogram Equalization
Histograms
Image color analysis
Image edge detection
Image enhancement
Image restoration
L a b colour space
L-CIF
Underwater image enhancement
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Summary:Contrast degradation due to wavelength-based light attenuation compromises quality of sub-aquatic images. In this paper, L-CLAHE Intensification Filter (L-CIF) algorithm is proposed to improve the quality of underwater images and to enhance underwater images in pre-processing stages. The proposed algorithm consists of three modules, named L-CLAHE, intensification, and filtering. The input image is converted to L*a*b colour space. CLAHE algorithm is used to process the extracted L* channel. The output of L-CLAHE module is processed with gamma correction, histogram equalization and bilateral filter in intensification and filter stages. The output image is contrast improved and colour corrected.
ISSN:2326-5566
DOI:10.1109/SYMPOL48207.2019.9005278