A large portion of image contours is characterized by local properties such as sharp
variations of the image intensity across the contour. The integration of local image …

The problem of estimating the regular portions of the contours in an image is formulated in a
probabilistic and multiscale framework. The objective is to compute a small set of polygonal …

The determination of the length of a discrete contour is frequently required in image
analysis. Many methods have been proposed [1–6]. It is the purpose of this paper to review …

The growing interest in recent years towards the multimedia and the large amount of
information exchanged across the network involves the various fields of research towards …

This paper describes a method of approximating a shape contour with a polygon. The
polygon vertices are extracted from the curvature extremes, through a scale-space …

Conventional polygonal approximation techniques have a fixed parameter that makes it
difficult to extract the minimum number of critical points that represent faithfully complex …

This thesis covers topics required for recognition of objects in images which are noisy and of
low resolution. A contour extraction technique is presented which can determine a subpixel …

Estimation of a digital curve's curvature at any given point is needed for many tasks in
computer vision, be it differential invariants or curvature scale space. However, curvature …

While edge detection is an important first step for many vision systems, the linked lists of
edge points produced by most existing edge detectors lack the higher level of curve …

This paper presents a new method for compactly representing contours. The new method is
a generalization of the Fourier descriptor (FD) method. Like the FD method it approximates a …