Extracting primary features of a statistical pressure snake.

Schaub, Hanspeter (ORION International Technologies, Albuquerque, NM)

Sandia National Laboratories

关键词: Orientation;    Color Target Recognition.;    Dimensions;    99 General And Miscellaneous//Mathematics, Computing, And Information Science;    Parametric Grid Information;   

DOI  :  10.2172/974894
RP-ID  :  SAND2004-1869
RP-ID  :  AC04-94AL85000
RP-ID  :  974894

美国|英语

来源: UNT Digital Library

【 摘 要 】

Assume a target motion is visible in the video signal. Statistical pressure snakes are used to track a target specified by a single or a multitude of colors. These snakes define the target contour through a series of image plane coordinate points. This report outlines how to compute certain target degrees of freedom. The image contour can be used to efficiently compute the area moments of the target, which in return will yield the target center of mass, as well as the orientation of the target principle axes. If the target has a known shape such as begin rectangular or circular, then the dimensions of this shape can be estimated in units of image pixels. If the physical target dimensions are known apriori, then the measured target dimensions can be used to estimate the target depth.