Decorrelation stretch for enhancing colour fundus photographs affected by cataracts

A method of enhancing colour fundus photographs is proposed to reduce the effect of cataracts. The enhancement method employs a decorrelation stretch (DS) technique in an LCC colour model. The initial designed technique embeds Hubbard's colouration model into DS parameters to produce enhanced r...

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Bibliographic Details
Published in:Computer methods in biomechanics and biomedical engineering. 2024-01, Vol.11 (7)
Main Authors: Vonghirandecha, Preecha, Kansomkeat, Supaporn, Bhurayanontachai, Patama, Sae-Ueng, Pannipa, Intajag, Sathit
Format: Article
Language:English
Subjects:
cataract
Decorrelation stretch
retinal image enhancement
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Summary:A method of enhancing colour fundus photographs is proposed to reduce the effect of cataracts. The enhancement method employs a decorrelation stretch (DS) technique in an LCC colour model. The initial designed technique embeds Hubbard's colouration model into DS parameters to produce enhanced results in a standard form of age-related macular degeneration (AMD) reading centres. The colouration model could modify to enhance the colour of lesions observed in diabetic retinopathy (DR). The proposed algorithm could improve the effect of cataracts on fundus images and provided good results when the density of the cataract was less than grade 2. In the case of images taken through cataracts higher than or equal to grade 2, some output results could become unusable when the cataract was in line with the macula.
ISSN:2168-1163
2168-1171
DOI:10.1080/21681163.2023.2274948