Image Processing Basics - Digital Signal Processing: Fundamentals and Applications - page 713

FIGURE 14.26B

Enhanced image using a Gaussian lowpass filter.

and the column edge. Hence, edge distortion is introduced at image boundary. Let us look at
Example 14.8.

EXAMPLE 14.8
Consider a 3 3 median filter kernel and the following 8-bit grayscale original and corrupted (noisy) images:

2
4

3
5

100 100 100 100
100 100 100 100
100 100 100 100
100 100 100 100

4 4 original image :

2
4

3
5

100 255 100 100
100 255 100 100
255 100 100 0
100 100 100 100

4 4 corrupted image by impulse noise :

2
4

3
5

3 3 median filter kernel :

33
Perform digital filtering, and compare the filtered image with the original one.