Title: Image denoising by median filter in wavelet domain,
Abstract: The details of an image with noise may be restored by removing noise through
a suitable image de-noising method. In this research, a new method of image
de-noising based on using median filter (MF) in the wavelet domain is proposed
and tested. Various types of wavelet transform filters are used in conjunction
with median filter in experimenting with the proposed approach in order to
obtain better results for image de-noising process, and, consequently to select
the best suited filter. Wavelet transform working on the frequencies of
sub-bands split from an image is a powerful method for analysis of images.
According to this experimental work, the proposed method presents better
results than using only wavelet transform or median filter alone. The MSE and
PSNR values are used for measuring the improvement in de-noised images.