How to operate area filtering ?

filter

asked 2018-03-29 20:26:20 -0600

PengGuanjun
1 ●1 ●2

I use open and close operate to deal with the original image below,but I have not removed tiny black points. How to remove these small black points through area filtering and protect the edges of my ROI? image description

edit retag flag offensive close merge delete

add a comment

1 answer

Sort by » oldest newest most voted

answered 2018-03-29 21:34:47 -0600

moHe

221 ●1 ●8

Bilateral Filter can smooth the image while preserving the edges.
Use findContours to find the contours with small area, and fill them with white pixels.