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Enhancing retinal images in low-light conditions using semidecoupled decomposition

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Abstract

Eye diseases that are common and many diseases that result in visual ailments, such as diabetes and vascular disease, can be diagnosed through retinal imaging. The enhancement of retinal images often helps in diagnosing diseases related to retinal organ failure. However, today’s image enhancement methods may lead to artificial boundaries, sudden color gradation, and the loss of image details. Therefore, to prevent these side effects, a new method of retinal image enhancement is proposed. In this work, we propose a new method for enhancing the overall contrast of colored retinal images. That is, we propose low-light image enhancement using a new retinex method based on a powerful semidecoupled retinex method. In particular, illumination layer I gradually approximates the S input image according to the file. This leads to a complete Gaussian transformation model, while the R-layer reflectance is estimated jointly by S and intermediary by I to suppress image noise simultaneously during R estimation on the publicly available Messidor database. From our assessment measurements (PSNR and SSIM), we show that this proposed method is effective in comparison with the relevant and recently proposed retinal imaging methods; moreover, the color, which is determined by the data, does not change the image structure. Finally, a technique is presented to improve the pronounced color of a retinal image, which is useful for ophthalmologists to screen for retinal disease more effectively. Moreover, this technique can be used in the development of robotics for imaging tests to search for clinical markers.

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Authors and Affiliations

  1. Major of Computer and Information Technology, Faculty of Information Technology, Roi Et Rajabhat University, Roi Et, Thailand

    Nitit WangNo

  2. Major of Computer Science, Department of Applied Science, Faculty of Science and Technology, Loei Rajabhat University, Loei, Thailand

    Supailin Pichai

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  1. Nitit WangNo
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  2. Supailin Pichai
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Correspondence to Nitit WangNo.

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WangNo, N., Pichai, S. Enhancing retinal images in low-light conditions using semidecoupled decomposition. Med Biol Eng Comput 61, 1795–1805 (2023). https://doi.org/10.1007/s11517-023-02811-4

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  • DOI: https://doi.org/10.1007/s11517-023-02811-4

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