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- W3015340282 abstract "Abstract Color fundus image analysis for detecting the retinal abnormalities requires an improved visualization of image attributes with sufficient luminosity, contrast and accurate edge details. A hybrid technique based on singular value equalization using shearlet transform and adaptive gamma correction, followed by contrast limited adaptive histogram equalization (CLAHE) is proposed for the enhancement of luminosity and contrast in color fundus images. The low frequency components of the original and adaptive gamma transformed value channel in HSV color space obtained by applying shearlet transform are considered for singular value equalization. The high frequency components of the unchanged value channel, denoised using soft thresholding are applied while performing inverse shearlet transform. Luminosity component in L * a * b * colorspace is considered for performing CLAHE on the singular value equalized image. Subjective analysis is done based on visualization of the image attributes and the objective analysis is carried out based on the parameters such as Peak signal to noise ratio, entropy, feature similarity index, edge-based contrast measure, quality index and noise suppression measure. The simulation results evince superior noise performance, sufficient luminosity adjustment and improved contrast along with excellent edge detail preservation when compared with the existing state-of-the-art techniques." @default.
- W3015340282 created "2020-04-17" @default.
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- W3015340282 date "2020-04-01" @default.
- W3015340282 modified "2023-10-16" @default.
- W3015340282 title "A hybrid feature preservation technique based on luminosity and edge based contrast enhancement in color fundus images" @default.
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- W3015340282 doi "https://doi.org/10.1016/j.bbe.2020.02.006" @default.
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