We introduce a method for estimation of rotation invariant local shape descriptors for 3D models. This method follows a successful idea commonly used to obtain rotation invariant descriptors in 2D images, and improves it by tackling the difficulty of the 3 degrees of freedom that exists in 3D models. Our method is simple, yet it achieves high levels of invariance after rotation transformations,...

Article history: Received 1 June 2015 Received in revised form 22 December 2015 Accepted 3 February 2016 Available online 6 February 2016

Using detailed stockholding for a comprehensive sample of Chinese mutual funds from 2004 to 2009, we investigate the economy of scale and liquidity on the relation between fund size and performance. We find that there exists an inverted U-shape relation between fund size and performance accounting for various performance benchmarks. Both economy of scale and liquidity exist and play an importan...

In this paper, we want to find a corner enhancement curve deformation approach. We consider General Geometric Heat Flow(GGHF) as a general deformation approach, and the evolution of curvature in the approach is derived. The criteria of curvature scale space are proposed and subjected to the GGHF. The conditions under which the corner can be enhanced are also studied. From all these constraints,...

A method for representing and matching logos based on positive and negative shape features is presented. Negative shape features represent an object that consists of several components enclosed in a simple geometric structure (e.g, a square) based on its interior with the components considered as holes. The goal is to find logos in a database that are most similar to a given sample logo. A bord...

We studied the influence of shape and secondary, or intercellular, organization on the absorption and scattering properties of red blood cells to determine whether these properties are of any practical significance for optical evaluation of whole blood and its constituents. A series of measurements of transmittance and reflectance of light from bovine blood in a flow cuvette was conducted with ...

This report surveys current literature related to statistical shape analysis. There are two paradigms: (1) Models that have no prior knowledge about the shape. They evolve boundary curves in time while maintaining predefined smoothness constraints. (2) Models that have prior knowledge about a fixed shape. They use this knowledge to find object boundaries using the covariance matrix and the aver...

Silhouette recognition can reconstruct the three-dimensional pose of a human subject in monocular video so long as the camera’s view remains unoccluded by other objects. This paper develops a shape representation that can describe and compare partial shapes, extending the silhouette recognition technique to apply to video with occlusions. The new method operates without human intervention, and ...

The problem we consider in this paper is to take a single two-dimensional image containing a human body, locate the joint positions, and use these to estimate the body configuration and pose in three-dimensional space. The basic approach is to store a number of exemplar 2D views of the human body in a variety of different configurations and viewpoints with respect to the camera. On each of thes...