We show how to actively compute qualitative shape properties directly from image intensities that is, without having to rst \reconstruct the surface". Our approach diverges from classical active shape from shading [1] in two important ways. First, we do not attempt to compute a dense depth map of the surface. We rather detect the presence of certain qualitative geometric features. Second, we us...

1 Hougen and Ahuja This 1993 paper [2] is the first method to approach the multiple light source problem. It uses a combination of stereo, light source estimation, and shape from shading methods for determining the shape of objects. This summary will focus on the proposed light source estimation technique and it’s integration in the system. Four main assumptions are stated: 1. The light sources...

Statistical shape analysis has become of increasing interest to the neuroimaging community due to its potential to precisely locate morphological changes and thus potentially discriminate between healthy and pathological structures. This paper describes a combined boundary and medial shape analysis based on two different shape descriptions applied to a study of the hippocampus shape abnormaliti...

An improvement of the Active Shape procedure introduced by Cootes and Taylor is presented. The new automated brain segmenta-tion and interpretation approach incorporates a priori knowledge about neuroanatomic structures and their speciic structural relationships to provide robust segmentation and labeling. The method was trained in 8 MR brain images and tested in 19 brain images by comparison t...

The generative surface reconstruction problem can be stated like this: Given a finite collection of 3D shapes, create a small set of functions that can be combined to generate the given shapes procedurally. We propose generative fact labeling (GFL) as an attempt to organize the iterative process of shape analysis and shape synthesis in a systematic way. We present our results for the reconstruc...

Ballistic conductance fluctuations were measured in a GaAs quantum dot as a function of shape distortion and magnetic field. Shape distortion provides a novel source of conductance fluctuations and creates an effective “ensemble of dots,” allowing statistics to be studied at fixed field. Continuous changes in fluctuation statistics due to breaking of time-reversal symmetry are seen about zero m...