Abstract
The identification of illnesses relating to the retina is greatly aided by retinal fundus imaging. Retinal image enhancement typically aids in the analysis of disorders connected to the retinal fundus image because the detailed information of the retinal fundus image, such as small vessels, microaneurysms and exudates, may be in low contrast. The false boundaries, rapid changes in colour levels and loss of visual detail can result from current image-enhancing techniques. In this study, we present a novel image enhancement approach utilizing the concept of geometric function theory (GFT). Initially, coefficient bounds were obtained by the subclass \( {\mathfrak {p}}-\Phi {\mathcal {S}}^*(t,\mu ,\nu ,J,K) \). Then, for the enhancement process these coefficients were subsequently convoluted with the input image. To assess the quality of the enhanced images, we employed a set of performance metrics, including peak signal-to-noise ratio, structured similarity indexing method, contrast improvement ratio and absolute mean brightness error. Comparative analysis against established state-of-the-art methods revealed that our GFT-based enhancement method consistently outperforms existing techniques.
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Data Availability
Source files of the test images are given below: Source file of “VIRAL PNEUMONIA”.Source file of “PEPPERS”.Source file of “YELLOWLILY”.Source file of “MOON”.Source file of “SATURN”.Source file of “RETINAL”.
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Nithiyanandham, E.K., Keerthi, B.S. A new proposed model for image enhancement using the coefficients obtained by a subclass of the Sakaguchi-type function. SIViP 18, 1455–1462 (2024). https://doi.org/10.1007/s11760-023-02861-z
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DOI: https://doi.org/10.1007/s11760-023-02861-z