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- W2064921503 abstract "In the production of medical images, noise reduction and contrast enhancement are important methods to increase qualities of processing results. Wavelet transforms have shown promising results for localization in both time and frequency, and hence have been used for image processing applications including noise removal. By using the edge-based denoising and adaptive nonlinear histogram stretching, a novel medical image enhancement algorithm is proposed. First, a medical image is decomposed by wavelet transform, and then all high frequency sub-images are decomposed by Haar transform. At the same time, edge detection with Sobel operator is performed. Second, noises in all high frequency sub-images are reduced by edge-based soft-threshold method. Third, high frequency coefficients are further enhanced by adaptive weight values in different sub-images. Through the inverse Haar transform and the inverse wavelet transform, the enhanced image is obtained. Finally, the proposed adaptive nonlinear histogram stretching method is applied to increase the contrast of resultant image. Experimental results show that the proposed algorithm can enhance a low contrast medical image while preserving edges effectively without blurring the details." @default.
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- W2064921503 date "2013-10-31" @default.
- W2064921503 modified "2023-09-27" @default.
- W2064921503 title "Medical Image Enhancement Algorithm Using Edge-Based Denoising and Adaptive Histogram Stretching" @default.
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- W2064921503 doi "https://doi.org/10.14257/ijbsbt.2013.5.5.03" @default.
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