OpenCV with Python By Example

Sharpening

Applying the sharpening filter will sharpen the edges in the image. This filter is very useful when we want to enhance the edges in an image that's not crisp. Here are some images to give you an idea of what the image sharpening process looks like:

As you can see in the preceding figure, the level of sharpening depends on the type of kernel we use. We have a lot of freedom to customize the kernel here, and each kernel will give you a different kind of sharpening. To just sharpen an image, like we are doing in the top right image in the preceding picture, we would use a kernel like this:

If we want to do excessive sharpening, like in the ...