Authors : Susan John, A. K. Joshi and S. V. Moharil
Page Nos : 280-286
Description :
ABSTRACT:
In this paper, image enhancement and noise filtering technique using extended Fast Fourier transformation function [1] is presented. The image enhancement and the denoising operations are coupled in this newly developed algorithm. In this method multiplication factor,
we used that factor n to determine the most degree of the contrast depending on the degree of darkness or brightness of the original image, is multiplied to the Fourier transformed image, and image is reconstructed using inverse Fourier transform. The experiment result shows notable subjective improvement in terms of quality. Moreover its computational complexity is also less. In this paper we proposed a contrast enhancement technique without affecting the mean brightness of the images and also denoises the image. The experimental results show that we are able to enhance the contrast of the input image without making any significant effect on the mean brightness of the image.
Index terms: De-noiseing, Enhancement factor, Fast Fourier transform, Image enhancement, Inverse Fourier transform & Sinc(x) function.
