In this article, for the first time, one develops a nonparametric methodology for an analysis of shapes of configurations of landmarks on real 3D objects from regular camera photographs, thus making 3D shape analysis very accessible. A fundamental result in computer vision by Faugeras (1992), Hartley, Gupta and Chang (1992) is that generically, a finite 3D configuration of points can be retriev...

Segmenting and tracking multiple humans is a challenging problem in complex situations in which extended occlusion, shadow and/or reflection exists. We tackle this problem with a 3D model-based approach. Our method includes two stages, segmentation (detection) and tracking. Human hypotheses are generated by shape analysis of the foreground blobs using human shape model. The segmented human hypo...

Segmenting and tracking multiple humans is a challenging problem in complex situations in which extended occlusion, shadow and/or reflection exists. We tackle this problem with a 3D model-based approach. This method includes two stages, segmentation (detection) and tracking. Human hypotheses are generated by shape analysis of the foreground blobs using human shape model. The segmented human hyp...

Three-dimensional shape retrieval is a problem of current interest in several different fields, especially in the mechanical engineering domain. There exists a large body of work in developing representations for 3D shapes. However, there has been limited work done in developing domaindependent benchmark databases for 3D shape searching. We propose a benchmark database for evaluating shape-base...

The word symmetry originates from the Greek word sum metria (’to measure together’ ) and has two primary definitions; the harmony of the parts with each other and the whole and the condition of being well-balanced and well-proportioned. Both of these definitions imply a strong relationship between symmetry and beauty. Essentially, many objects in nature which human beings find exceptionally app...

The hippocampus is a prominent subcortical feature of interest in many neuroscience studies. Its subtle morphological changes often predicate illnesses, including Alzheimer’s, schizophrenia or epilepsy. The precise location of structural differences requires a reliable correspondence between shapes across a population. In this paper, we propose an automated method for groupwise hippocampal shap...

This paper discusses four store-based concrete memory models. We characterize memory models by the class of pointers they support and whether they use numerical or symbolic offsets to address values in a block. We give the semantics of a C-like language within each of these memory models to illustrate their differences. The language we consider is a fragment of Leroy’s Clight, including arrays,...

This paper is devoted to the problem of the hardware implementation of selected shape description algorithms. The properties and complexity of particular methods are discussed in order to find those that are most applicable to a direct hardware implementation. Thus, the complexity of both the approaches and the processed data should be minimised. In this paper the properties of the Roundness, X...

This paper presents a framework for the geometric interpretation of a single polarization image taken of specular reflecting objects. The task of recovering 3D shape information of specular objects from intensity images is a difficult if not impossible one, as no intensity based features are available. Polarization analysis provides additional features to overcome the problem. In particular the...