ABSTRACT
Once images are inside the computer system, or more specically, once they are read inside a program, the images are nothing but matrices. Hence, all the operations that can be applied to matrices should theoretically be applicable to the images as well. However, that is not entirely true. Some of the matrix-arithmetic operators can be applied to image matrices, whereas other operators do not have any meaning in image processing. At the same time, the image matrices have certain special operators that are specic to images and that are not usually found in the matrix-arithmetic world. Image arithmetic is the implementation of standard arithmetic operations, such as addition, subtraction, multiplication, and division, for images. Image arithmetic has many uses in image processing, both as a preliminary step in more complex operations and by itself.
