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Sub-pixel Stereo Matching based on Half-phase DCT Interpolation
Zhang Zhuoyun * #,Hou Chunping,Shen Lili
School of Electronic and Information Engineering, Tianjin University
*Correspondence author
#Submitted by
Subject:
Funding: 863 Program （No.No. 2008AA01A320, 2009B090300008 and 2009AA01Z306）, the National Natural Science Foundation of China （No.No. 60932007）
Opened online:15 September 2010
Accepted by: none
Citation: Zhang Zhuoyun,Hou Chunping,Shen Lili.Sub-pixel Stereo Matching based on Half-phase DCT Interpolation[OL]. [15 September 2010] http://en.paper.edu.cn/en_releasepaper/content/4384955
 
 
A novel stereo matching algorithm is proposed based on the sub-pixel matching scheme. Because much information of the scene is lost in the sampling grid, the disparity maps obtained by sub-pixel matching have more precise structures than those by integer-pixel matching. Sub-pixel values are essential to the performance. In order to compute the sub-pixel values as close as possible to the actual ones, we propose the half phase DCT (HPDCT) interpolation algorithm. It improves upon the DCT-based algorithm based on the characteristics of the disparity map. We also compare the HPDCT algorithm with the linear interpolation and nearest-neighbor interpolation algorithms. Both the subjective evaluation and objective index demonstrate the advantages of the proposed algorithm over integer-pixel matching and sub-pixel matching with the other two interpolation algorithms.
Keywords:Stereo matching; sub-pixel; half phase DCT interpolation; depth map; Gibbs' effect
 
 
 

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