Forma, Vol. 8 (No. 1), pp. 147-155, 1993
Original Paper

Integral Method for Estimation of Connectivity of Elements in 2-Dimensional Gray Patterns

Ryuji Takaki1 and Yoji Arai2

1Tokyo University of Agriculture and Technology, Fuchu, Tokyo 183, Japan
2Kyoritsu Women Junior College, Chiyoda, Tokyo 101, Japan

(Received May 10, 1993; Accepted June 14, 1993)

Keywords: Image analysis, Connectivity, Gray Pattern, Integral method

Abstract. A new method is proposed to estimate a parameter showing connectivity of elements in gray patterns. Given a continuous function f(x, y), integrals of quantities obtained from f are shown to give the parameter, say r, characterizing the connectivity, so that r = 1 for isolated convex dark element (or group of such elements), r = -1 for isolated concave light holes (or group of such holes) and |r| < 1 for complex patterns in between. It is shown that this method is effective for patterns with smooth distribution of gray level.