High Resolution Depth-map Estimation in Real-time using Efficient Multi-threading
효율적인 멀티 쓰레딩을 이용한 고해상도 깊이지도의 실시간 획득

Chil-Suk Cho, Ji-In Jun, Hyon-Gon Choo, Jong-Il Park
2012 Journal of Broadcast Engineering  
A depth map can be obtained by projecting/capturing patterns of stripes using a projector-camera system and analyzing the geometric relationship between the projected patterns and the captured patterns. This is usually called structured light technique. In this paper, we propose a new multi-threading scheme for accelerating a conventional structured light technique. On CPUs and GPUs, multi-threading can be implemented by using OpenMP and CUDA, respectively. However, the problem is that their
more » ... formance changes according to the computational conditions of partial processes of a structured light technique. In other words, OpenMP (using multiple CPUs) outperformed CUDA (using multiple GPUs) in partial processes such as pattern decoding and depth estimation. In contrast, CUDA outperformed OpenMP in partial processes such as rectification and pattern segmentation. Therefore, we carefully analyze the computational conditions where each outperforms the other and do use the better one in the related conditions. As a result, the proposed method can estimate a depth map in a speed of over 25 fps on 1280´ 800 images.
doi:10.5909/jbe.2012.17.6.945 fatcat:b5wtlm445fdctpigxo7royeohy