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you can blend the two images with addweighted() function

you can blend the two images with addweighted() functionfunction. But what is your goal and why you want to do that?

you can blend the two images with addweighted() function. function or you can just apply something like src += canny_image; but you will need first convert your canny image to bgr. But what is your goal and why you want to do that?

you can blend the two images with addweighted() function or you can just apply something like src += canny_image; but you will need first convert your canny image to bgr. But what is your goal and why you want to do that?

Mat dst, detected_edges;
Canny( gray, detected_edges, 30, 100, 3 );

imshow("canny", detected_edges);

dst = Scalar::all(0);

Mat addweight;
src.copyTo( dst, detected_edges); // copy part of src image according the canny output, canny is used as mask
cvtColor(detected_edges, detected_edges, CV_GRAY2BGR); // convert canny image to bgr
addWeighted( src, 0.5, detected_edges, 0.5, 0.0, addweight); // blend src image with canny image
src += detected_edges; // add src image with canny image

imshow("addition", src );
imshow("copyTo", dst );
imshow("addwweighted", addweight );
waitkey();

you can blend the two images with addweighted() function or you can just apply something like src += canny_image; but you will need first convert your canny image to bgr. But what is your goal and why you want to do that?

Mat dst, detected_edges;
Canny( gray, detected_edges, 30, 100, 3 );

imshow("canny", detected_edges);

dst = Scalar::all(0);

Mat addweight;
src.copyTo( dst, detected_edges); // copy part of src image according the canny output, canny is used as mask
cvtColor(detected_edges, detected_edges, CV_GRAY2BGR); // convert canny image to bgr
addWeighted( src, 0.5, detected_edges, 0.5, 0.0, addweight); // blend src image with canny image
src += detected_edges; // add src image with canny image

imshow("addition", src );
imshow("copyTo", dst );
imshow("addwweighted", addweight );
waitkey();

source:

canny:

addition:

copyTo:

addweighted:

you can blend the two images with addweighted() function or you can just apply something like src += canny_image; but you will need first convert your canny image to bgr. But what is your goal and why you want to do that?

Mat dst, detected_edges;
Canny( gray, detected_edges, 30, 100, 3 );

imshow("canny", detected_edges);

dst = Scalar::all(0);

Mat addweight;
src.copyTo( dst, detected_edges); // copy part of src image according the canny output, canny is used as mask
cvtColor(detected_edges, detected_edges, CV_GRAY2BGR); // convert canny image to bgr
addWeighted( src, 0.5, detected_edges, 0.5, 0.0, addweight); // blend src image with canny image
src += detected_edges; // add src image with canny image

imshow("addition", src );
imshow("copyTo", dst );
imshow("addwweighted", addweight );
waitkey();

source:

canny:

addition:

copyTo:

addweighted: