Title :
Wavelet based contrast enhancement for still images
Author :
Nafornita, C. ; Isar, Alexandru
Abstract :
This paper presents a fast and simple contrast enhancement technique, that uses the Dual-Tree Complex Wavelet transform (DTCWT), coupled with the bivariate Laplace model for local adaptive contrast improvement. In order to overcome the noise amplification that results from nonlinear operations especially in the homogeneous areas of the image, denoising using bishrink filter in the DTCWT domain is used.
Keywords :
Laplace transforms; image denoising; wavelet transforms; DTCWT domain; bishrink filter; bivariate Laplace model; contrast enhancement technique; denoising; dual-tree complex wavelet transform; local adaptive contrast improvement; noise amplification; nonlinear operations; still images; Entropy; Noise; Noise reduction; Standards; Wavelet coefficients; complex wavelets; contrast enhancement; denoising; still images;
Conference_Titel :
Electronics and Telecommunications (ISETC), 2014 11th International Symposium on
Conference_Location :
Timisoara
Print_ISBN :
978-1-4799-7266-1
DOI :
10.1109/ISETC.2014.7010797
