DIP: Topic 4: What is a Digital image?
What is a Digital image?
- We usually operate on digital (discrete) images:
- Sample the 2D space on a regular grid.
- Quantize each sample (round to nearest integer.
- A digital image can be defined as a two dimensional function, f (i,j), where x and y are spatial coordinates, and f intensity or gray-level of the image at that point.
- A digital image is composed of a finite number of elements called pixels, each of which has a particular location and value.
