OpenCV Series — 12 — Blemish Removal

Photo by Jenny Pace on Unsplash

In this post , we will see how to use the sobel filter in opencv to get the gradient of an image patch and use that to hide the blemish patch in an image.

Step: 1:

Determine the radius of the patch required based on the size of the blemishes in the image and Load the image.

Step: 2:

Use the mouse callback function to get the x and y values

Step: 3:

Get the patch using the x, y and r values

crop_img = source[y:(y+2*r), x:(x+2*r)]

Step: 4:

Use the selected patch as center, convolve around eight direction , around the patch and get the lowest gradient value using sobel filter.

Step: 5:

Now with the new gradient patch , apply opencv’s seamless cloning function to apply the new patch on the blemish patch.

Image with Blemishes

Post Blemish Removal