keep values in a specific range in a mat using opencv

c++
range

asked 2014-02-21 03:06:43 -0600

mahsa
58 ●6

updated 2014-02-21 03:59:32 -0600

berak
32993 ●7 ●81 ●312

I have a matrix which has values between 100 to 900. I want to just keep values between 300 to 400 and make zero rest of them. I could not find any thresholding function which keep values between a Range. Does Opencv have any function to do that?

Thanks in advance...

edit retag flag offensive close merge delete

add a comment

1 answer

Sort by » oldest newest most voted

answered 2014-02-21 03:52:55 -0600

Haris

3804 ●3 ●28 ●57

updated 2014-02-21 03:54:50 -0600

Simply do the following...

First create a mask image using inRange, here you should use your upper and lower threshold.
Now using Mat::copyTo copy your source Mat to a new Mat, with the above mask.

Code:

    Mat src; //Your source image
    Mat mask,dst;
    inRange(src,Scalar(300),Scalar(400),mask); // Create a mask image in the range 300 and 400
    src.copyTo(dst,mask); // Your final mat with value between 300 and 400