Title :
A new contrast measure based image enhancement algorithm in the DCT domain
Author :
Sun, Qingling ; Tang, Jinshan
Author_Institution :
Dept. of Comput. Sci., Virginia Univ., Charlottesville, VA, USA
Abstract :
In this paper a new algorithm is presented for image enhancement in the discrete cosine transform (DCT) domain. The algorithm is based on a novel contrast measure that is defined for each DCT coefficient. This algorithm can be applied to the enhancement of images compressed with JPEG and it is especially useful when it is applied to enhance the direction contrast of the images. Experimental results show the effectiveness of the proposed algorithm.
Keywords :
discrete cosine transforms; image coding; image enhancement; DCT; JPEG; contrast measure; discrete cosine transform; image compression; image enhancement; Discrete Fourier transforms; Discrete cosine transforms; Discrete wavelet transforms; Electronic mail; Fourier transforms; Frequency domain analysis; Image coding; Image enhancement; Performance evaluation; Transform coding;
Conference_Titel :
Systems, Man and Cybernetics, 2003. IEEE International Conference on
Print_ISBN :
0-7803-7952-7
DOI :
10.1109/ICSMC.2003.1244186
