3. Area, length, width, and perimeter are common measures of object size.
4. Object shape can be captured by measures of circularity, rectangularity,
moments, and Euler number, among other features.
5. Histogram measures capture the statistics of an object’s gray levels.
6. Texture measures capture the statistics of an object’s gray-level structure.
7. Objects can be described using compact descriptors such as a chain codes,
the medial axis transform, and graphs.
References
1. K Fukunaga, Introduction to Statistical Pattern Recognition, Academic Press, 1972.
2. H Blum, ‘‘Biological Science and Visual Shape (Part I),’’ Journal of Theoretical Biology,
38:205–287, 1973.
3. RO Duda and PE Hart, Pattern Classification and Scene Analysis, Wiley-Interscience, ...