Electronic and Electrical Engineering Department,Electrical Engineering Islamic Azad university South Tehran Branch, Tehran, Iran
This paper presents an efficient adaptive filter, to remove impulse noise from X-ray images. This filter has two stages. At the first stage, based on the intensity value, the pixels are classified into two classes, which are noisy pixels and noise- free pixels, the noisy pixels are only processed and the noise-free pixels remain unchanged. In this method the size of window is adaptively changed and the edges and details are preserves, hence for the replacing noisy pixels, two issues are considered the noise-free pixels and the level of noise in an image. The result from 50 test X-ray images showed that this method is promising to remove the impulse noise from X-ray images.