G.
Marchionini, UNC-CH
Example: Color Histogram
Each pixel has color depth (e.g., 16
bits)
Divide image into regions (e.g.,
8x8 pixels)
Create a histogram for each
region (amount of red, cyan, etc.)
The set of histograms serves as
a quantitative representation for the image, allowing
comparisons and rankings
Querying awkward (use QBE)