EE4206/EE5806 Digital Image Processing Colour Image Smoothing
1. Gray-scale image smoothing can be viewed as a spatial filtering operation in which the coefficients of the filtering mask have the SAME value.
As the mask is slid across the image to be smoothed, each pixel is replaced by the average of the pixels in the neighborhood defined by the mask.
2. For colour image, instead of scalar intensity values we must deal with component vectors.
Let Sxy denote the set of coordinates defining a neighborhood centered at (x,y) in an RGB colour image. The average of the RGB component vectors in this neighborhood is . . .