Performing Filter in a specific part of the image

asked 2017-06-06 07:38:53 -0600

arqam
36 ●1 ●2 ●6

updated 2017-06-07 00:40:57 -0600

berak
32993 ●7 ●81 ●312

The defined method for filters example binary filter takes two parameters, the source image MAT and destination image MAT and performs filter on the full image.

But what if I want to perform operations like filter in only a part of the image for which we have the contour points (either Point or MatOfPoint).

The solution that I am looking for is in JAVA.

edit retag flag offensive close merge delete

add a comment

1 answer

Sort by » oldest newest most voted

answered 2017-06-07 00:38:23 -0600

berak
32993 ●7 ●81 ●312

updated 2017-06-07 00:40:18 -0600

if you have a Rect, e.g. from Imgproc.boundingBox() you can can use submat:

Mat roi = image.submat(rect);

operations, which don't change the depth or type of the image, can be done in-place:

Imgproc.equalizeHist(roi,roi);

else you need a new Mat for the output:

Mat gray = new Mat();
Imgproc.cvtColor(roi, gray, COLOR_BGR2GRAY);

edit flag offensive delete link

add a comment

Links

Question Tools

1 follower

Stats

Asked: 2017-06-06 07:38:53 -0600

Seen: 230 times

Last updated: Jun 07 '17

Performing Filter in a specific part of the image edit

1 answer

Links

Question Tools

Stats

Related questions

Performing Filter in a specific part of the image