what is the histogram filter?

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majid 2021-9-22

评论： majid 2021-9-22

Hello

I'm trying to image proccessing the image of lidar system.

for this purpose, I'm using combination filter which one of them is histogram filter but I can't understand the algorithms clearly?

can any one explain me the step of this method ???

thanks.

Rik 2021-9-22

This is how I understand it:

First choose a window size and a threshold. Then do these steps for every pixel:

Find the modal value of the center pixel and it's surrounding window
If the difference between the center pixel and the modal value is larger than some pre-defined threshold, replace it.

This is similar to using a convolution to find outliers, but instead of the mean, you want the mode.

majid 2021-9-22

thanks!

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