fspecial (disk)
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Hello everyone,
I have employed fspecial several times for the exercises of image processing course (h=special('disk',5);). But I have no idea how disk filter function works. Maybe sounds silly but I really appreciate if someone at least explains the big picture behind it.
Thanks in advance for your responses!
回答（1 个）
Jan
2017-5-11
doc fspecial
The term "Circular averaging filter (pillbox)" sounds very descritpive: The average over a circular shape is calculated. What exactly is not clear about this?
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Shohreh Kr
2017-5-11
Jan
2017-5-11
The value of each pixel is replaced by the mean of the values of all pixels inside a circle around this pixel.
What do you want to know exactly? How the circular mask is applied? How averaging RGB values work? If this is performed by 2 loops or vectorized? What the opical effect is?
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2017-5-11
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