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Computer Vision Accelerators for Mobile Systems based on OpenCL GPGPU Co-Processing

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Abstract

In this paper, we present an OpenCL-based heterogeneous implementation of a computer vision algorithm – image inpainting-based object removal algorithm – on mobile devices. To take advantage of the computation power of the mobile processor, the algorithm workflow is partitioned between the CPU and the GPU based on the profiling results on mobile devices, so that the computationally-intensive kernels are accelerated by the mobile GPGPU (general-purpose computing using graphics processing units). By exploring the implementation trade-offs and utilizing the proposed optimization strategies at different levels including algorithm optimization, parallelism optimization, and memory access optimization, we significantly speed up the algorithm with the CPU-GPU heterogeneous implementation, while preserving the quality of the output images. Experimental results show that heterogeneous computing based on GPGPU co-processing can significantly speed up the computer vision algorithms and makes them practical on real-world mobile devices.

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Notes

  1. In this case, the candidate patch is in the area of (S A−O A).

  2. In this case, the candidate patch is in the area of OA.

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Acknowledgment

This work was supported in part by Qualcomm, and by the US National Science Foundation under grants CNS-1265332, ECCS-1232274, and EECS-0925942.

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Authors and Affiliations

  1. Department of Electrical and Computer Engineering, Rice University, Houston, Texas, 77005, USA

    Guohui Wang & Joseph R. Cavallaro

  2. Qualcomm Technologies Inc., San Diego, California, USA

    Yingen Xiong & Jay Yun

Authors
  1. Guohui Wang
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  2. Yingen Xiong
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  3. Jay Yun
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  4. Joseph R. Cavallaro
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Corresponding author

Correspondence to Guohui Wang.

Additional information

This paper was partially presented at IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), Vancouver, Canada, May 2013.

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Wang, G., Xiong, Y., Yun, J. et al. Computer Vision Accelerators for Mobile Systems based on OpenCL GPGPU Co-Processing. J Sign Process Syst 76, 283–299 (2014). https://doi.org/10.1007/s11265-014-0878-z

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  • DOI: https://doi.org/10.1007/s11265-014-0878-z

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