What’s a digital image?

We usually operate on digital (discrete) images: • Sample the space on a regular grid • Quantize each sample (round to nearest integer) If our samples are d apart, we can write this as:

Digital images (or just “images”) are typically stored in a matrix • Different coordinate systems (x,y) vs. (i=row,j=column) • Helpful to use macros to convert when coding things up

scanalyze demo