DocumentCode :
1320522
Title :
Real-time disparity estimation algorithm for stereo camera systems
Author :
Sang Hwa Lee ; Sharma, Shantanu
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., Seoul Nat. Univ., Seoul, South Korea
Volume :
57
Issue :
3
fYear :
2011
fDate :
8/1/2011 12:00:00 AM
Firstpage :
1018
Lastpage :
1026
Abstract :
This paper proposes a real-time stereo matching algorithm using GPU programming. The likelihood model is implemented using GPU programming for real-time operation. And the prior model is proposed to improve the accuracy of disparity estimation. First, the likelihood matching based on rank transform is implemented in GPU programming. The shared memory handling in graphic hardware is introduced in calculating the likelihood model. The prior model considers the smoothness of disparity map and is defined as a pixel-wise energy function using adaptive interaction among neighboring disparities. The disparity is determined by minimizing the joint energy function which combines the likelihood model with prior model. These processes are performed in the multi-resolution approach. The disparity map is interpolated using the reliability of likelihood model and color-based similarity in the neighborhood. This paper evaluates the proposed approach with the Middlebury stereo images. According to the experiments, the proposed algorithm shows good estimation accuracy over 30 frames/second for 640×480 image and 60 disparity range. The proposed disparity estimation algorithm is applied to real-time stereo camera system such as 3-D image display, depth-based object extraction, 3-D rendering, and so on.
Keywords :
cameras; estimation theory; image colour analysis; image matching; image resolution; reliability; stereo image processing; transforms; 3D image display; 3D rendering; GPU programming; Middlebury stereo image processing; color-based similarity; depth-based object extraction; disparity map smoothness; joint energy function; likelihood matching; multiresolution approach; neighboring disparity; pixel-wise energy function; rank transform; real-time disparity estimation algorithm; real-time stereo camera system; real-time stereo matching algorithm; reliability; shared memory handling; Estimation; Graphics processing unit; Image color analysis; Instruction sets; Programming; Real time systems; Reliability; 3D rendering; GPU programming; Real-time stereo matching; multi-resolution; object extraction; prior model;
fLanguage :
English
Journal_Title :
Consumer Electronics, IEEE Transactions on
Publisher :
ieee
ISSN :
0098-3063
Type :
jour
DOI :
10.1109/TCE.2011.6018850
Filename :
6018850
Link To Document :
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