Stereo Track Blocks Coding System with Rotational Invariance

Abstract

Because the purpose and object of coding problem are different,it is necessary to make adjustments according to diffe-rent problems.For the coding problem of track blocks,a method of representing them by two-dimensional function is proposed,and track blocks are recognized by phase correlation.Firstly,track block is expanded under the two-dimensional polar coordinate system,and it is expressed as a two-dimensional discrete function.Due to the rotational invariance of the track block,the representation of track blocks is not unique,and a parameter matrix is introduced to specify a normal representation.Secondly,the phase correlation algorithm is used to measure the similarity of two track blocks.Finally,according to basic tracks in the block and their relative position,track block is compressed and encoded out of the representation of two-dimensional discrete function.Experiments show that our method has better expression of internal spatial structure and rotational invariance,and it is more extendable than the traditional coding methods.The solution of coding and matching problem is more adaptable for track blocks building and optimizing.

Keywords

• classification coding|stereo track block|two-dimensional function|phase correlation algorithm