Scene segmentation is a challenging problem that can be a prelude to many further applications in computer vision. This paper describes a novel MAP framework for automatic and robust scene segmentation in image sequences under mobile camera without any human interaction. First, an initial partition of the scene is achieved by watershed segmentation algorithm. However segmentation based on singl...

This paper introduces the sculptor's principle a new framework for shape representation and surface reconstruction from multiple shape cues. On one hand, a new shape from local brightness algorithm based on a standard voxel volume representation is presented. The sculptor's principle, on the other hand, provides the basis for a new and efficient representation of object surfaces by multiple dep...

This paper mainly focuses on applications for non-rigid contour tracking in heavily cluttered background scenes. Based on the properties of non-rigid contour movements, a cascading framework for estimating contour motion and deformation is proposed. We solve the non-rigid contour tracking problem by decomposing it into three sub problems: motion estimation, deformation estimation, and shape reg...

We present an algorithm for nonrigid contour tracking in heavily cluttered background scenes. Based on the properties of nonrigid contour movements, a sequential framework for estimating contour motion and deformation is proposed. We solve the nonrigid contour tracking problem by decomposing it into three subproblems: motion estimation, deformation estimation, and shape regulation. First, we em...

We address the problem of updating road maps in dense urban areas by extracting the main road network from a very high resolution (VHR) satellite image. Our model of the region occupied by the road network in the image is innovative. It incorporates three different types of prior geometric knowledge: generic boundary smoothness constraints, equivalent to a standard active contour prior; knowled...

Single neurons in primate V2 and cat A18 exhibit identical orientation tuning for sinewave grating and illusory contour stimuli. This cue invariance is also manifested in similar orientation maps to these stimuli, but in V1/A17 the illusory contour maps appear reversed. We hypothesized that this map reversal depends upon the spatial frequencies of the inducers in the illusory contours, relative...

Melanoma is one of the most dangerous types of skin cancer and causes thousands of deaths worldwide each year. Recently dermoscopic imaging systems have been widely used as a diagnostic tool for melanoma detection. The first step in the automatic analysis of dermoscopy images is the lesion segmentation. In this article, a novel method for skin lesion segmentation that could be applied to a vari...

This paper aims to propose a new approach calculate the quantitative relations between morphostructural similarity degree and map scale change in multi-scale contour clusters for automatic generalization. Terrain lines were extracted by pre-processing of unclosed lines, an indirect expression method relation was proposed based on terrain line hierarchical trees. Thirteen groups with different d...

A rigorous algorithm for computing the topology of the Apparent Contour of a generic smooth map is designed and studied in this paper. The source set is assumed to be a simply connected compact subset of the plane and the target space is the plane. Whitney proved that, generically, critical points of a smooth map are folds or cusps [9]. The Apparent Contour is the set of critical values, that i...