For a color image, how can we reduce noise using a median filter?

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kiruthika r
kiruthika r 2015-8-25
回答： Image Analyst 2015-8-25
For a color image, how can we reduce noise using a median filter?

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Image Analyst
Image Analyst 2015-8-25
One way is to just run medfilt2() on each color channel, red, green, and blue. Another way is to convert to HSV color space and run it on the V channel, and possibly on the S and H channels if you want. If you have salt and pepper noise, you can use a modified median filter where you replace only the noise pixels with median values and leave the rest of the image intact. I've attached a demo for that.

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