What do you mean by "saturation, brightness, contrast, sharpness, mirror image, filter" when processing pictures?

There are many problems. Simply put, saturation refers to the saturation of the color of the picture, that is, the concentration; Brightness refers to the brightness of the picture; Contrast refers to the contrast between light and shade of a picture; Sharpness generally refers to the clarity of a picture (outline); Mirror image, as the name implies, is the image seen from the mirror. Digital software has this function, which is to turn the picture left and right or up and down; Filters are a collection of various functions in PHOTOSHOP that deal with picture effects.

This is just a brief talk, but you should read more relevant books.