A nonlinear edge –preserving smoothing filter for edge detection on color and gray satellite images

  • Suhad A. Hamdan
Keywords: Edge detection, nonlinear filters, Gaussian noise, Sobel operator, color image.


A nonlinear filter for smoothing color and gray images
corrupted by Gaussian noise is presented in this paper. The proposed
filter designed to reduce the noise in the R,G, and B bands of the
color images and preserving the edges. This filter applied in order to
prepare images for further processing such as edge detection and
image segmentation.
The results of computer simulations show that the proposed
filter gave satisfactory results when compared with the results of
conventional filters such as Gaussian low pass filter and median filter
by using Cross Correlation Coefficient (ccc) criteria.