Some USB cameras themselves have edge emphasis function, but this time we will introduce image processing method.

 

There is a technique called Unsharp Mask (USM).

There are also functions in PhotoShop etc., but other software also has this function installed.

USM is a type of filter that emphasizes color differences between pixels that make up an image.

 

Image before unsharp mask is applied

Image after unsharp mask is applied

Sharpen the image that makes you feel blurry in the whole.

It has a function to highlight the outline of the image.