Object representation and recognition is one of the central problems
in computer vision. Normally, a reliable, working vision system must be
able to I) effectively segment the image and 2) recognize objects in the
image using their representations. This paper describes a complete,
working vision system [8] which segments the image effectively using a
light-box setup and recognizes isolated objects in the image reliably
using their curvature scale spk (CSS) representations [6], [7]. The
CSS representation is based on the scale space image concept introduced
in [lo] and popularized by Witkin [14]. It is an organization of
curvature zero-crossing points on a contour at multiple scales.
Note that an earlier CSS matching algorithm was implemented and
tested in [6]. That algorithm was designed for both open and closed
contour matching, made assumptions about the CSS image which were
not always valid and was relatively slow. The CSS matching algorithm
described in this paper in an improved, more efficient version of the
earlier algorithm which has been designed specifically for closed contour
matching