*help* Extracting a laser line

edit

You are correct that the red channel has a high intensity for the red laser line but also everything that is white. To filter for the red you could subtract the green channel from the red channel and you will get much better results. After thresholding you can erode and dilate to get rid of the noise.

I am working on something else that also requires laser line tracking. Dynamic programming is a pretty good way to solve this problem.

You can play around with my code at:

https://github.com/douglas125/LaserLi...

Hi,you may try OTSU method to solove the problem. in my code

Mat src = imread("chair.bmp");
vector<Mat> planes;
split(src,planes);
Mat red = planes[2];
Mat temp = planes[2] - planes[0];
threshold(temp,temp,0,255,THRESH_OTSU);
imwrite("reslut.jpg",temp);

the result pic is