Computer Imaging is the use of computers to create, edit and display graphical images, characters and objects. This is a broad field that consists of all computer domains and applications that somehow deal with digital images.
Computer imaging is also known as digital imaging.
Techopedia explains Computer Imaging
Computer imaging primarily focuses on using computers for the purposes of photography. This includes modifying digital images. It is applicable to both bitmapped and vector graphic images.
Generally, computer imaging requires specialized software that interacts with the graphical hardware/features of the computer. Some of the services it can provide include image resizing, coloring, shading, texturing, blending and editing.