Noise in images consists of any graininess or texture that occurs because of either the inherent quality of the image or the editing process. Noise filters, such as Add Noise, produce random texture and grain in an image. If you’re new to image editing, you might wonder why you’d want to add noise to an image in the first place.
Wouldn’t it be smarter to remove it? Well, sometimes. In practice, you can find a lot of applications that call for a little noise here and there.