27-02-2013, 03:16 PM
Sticks filter:
Sticks filter.docx (Size: 111.65 KB / Downloads: 19)
• Image enhancement can be done using sticks filter.
• By using sticks filter we can remove the noises in an image.
• The stick filter determines the mean of the neighbouring pixels in the direction of the stick-the most likely direction of the linear feature passing through(x,y).
• Assuming n is the stick’s length in pixels, there are 2*n-2 possible orientations of its can be arranged.
The sticks filter bank is applied to an image as follows.
• For each pixel in the image, each of the 2n − 2 masks is superimposed on the image
• The mean intensity of pixels along each hypothesized line is computed.
• The mask that results in the largest mean intensity is taken as the most likely hypothesis.
• The resulting maximal average is assigned to the corresponding pixel in the output image.
Let s1, s2,…, s2n−1 be the stick filter masks.