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- W2187449842 abstract "This project presents a novel contrast enhancement approach based on dominant brightness level analysis and adaptive intensity transformation for remote sensing images. The proposed algorithm computes brightness-adaptive intensity transfer functions using the low-frequency luminance component in the wavelet domain and transforms intensity values according to the transfer function. We first perform discrete wavelet transform (DWT) on the input images and then using the log-average luminance the LL subband into low-, middle-, and high- intensity layers will be decomposed. Intensity transfer functions are adaptively estimated by using the knee transfer function and the gamma adjustment function based on the dominant brightness level of each layer. After that, the resulting enhanced image is obtained by using the inverse DWT. Although various histogram equalization approaches have been proposed in the literature, they tend to degrade the overall image quality by exhibiting saturation artifacts in both low-and high-intensity regions. The proposed algorithm overcomes this problem using the adaptive intensity transfer function. The experimental results proves that the proposed algorithm enhances the overall contrast and visibility of local details better than existing techniques. The proposed method can effectively enhance any low-contrast images acquired by a satellite camera and are also suitable for other various imaging." @default.
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- W2187449842 date "2014-01-01" @default.
- W2187449842 modified "2023-09-26" @default.
- W2187449842 title "Different Contrast Enhancement Techniques for Remote Sensing Images and Their Comparison in Matlab" @default.
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