---
title: "An Extremum Principle for Shape From Contour"
authors:
  - "Michael Brady"
  - "Alan L. Yuille"
doi: ""
url: "https://ijcai.org/proceedings/1983/227"
pdf: "https://ijcai.org/proceedings/1983/0227.pdf"
venue: "Proceedings of the Eighth International Joint Conference on Artificial Intelligence"
year: 1983
pages: "969-971"
track: "Vision"
keywords:
---

# An Extremum Principle for Shape From Contour

Michael Brady, Alan L. Yuille

*Proceedings of the Eighth International Joint Conference on Artificial Intelligence*, pages 969-971.

## Abstract

An rx tmnum principle is de1 • elup ed that determines thr ee -dimensional surface ori entation from a /ll'u -Jimcmio nal cuntour. The principle maximizes the ratio of th e area to th e square of th e perimeter, a measure of th e compactness or S)' 111m c t1y of the thre e-dimensional swface. The princip le inlelprets re g ular figures correctly, it in terprets skcll' symmetrics as ur iellled real syn11nNrics. and it is approximated by th e maximum likdihoud method on irregular figures.