High Level Transforms for SIMD and Low-Level Computer Vision Algorithms
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Auteurs : Lionel Lacassagne [France] ; Daniel Etiemble [France] ; Hassan Zahraee [France] ; Alain Dominguez [États-Unis] ; Pascal Vezolle [France]Source :
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Abstract
This paper presents a review of algorithmic transforms called High Level Transforms for IBM, Intel and ARM SIMD multi-core pro-cessors to accelerate the implementation of low level image pro-cessing algorithms. We show that these optimizations provide a significant acceleration. A first evaluation of 512-bit SIMD Xeon-Phi is also presented. We focus on the point that the combination of optimizations leading to the best execution time cannot be pre-dicted, and thus, systematic benchmarking is mandatory. Once the best configuration is found for each architecture, a comparison of these performances is presented. The Harris points detection opera-tor is selected as being representative of low level image processing and computer vision algorithms. Being composed of five convolu-tions, it is more complex than a simple filter and enables more op-portunities to combine optimizations. The presented work can scale across a wide range of codes using 2D stencils and convolutions.
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<front><div type="abstract" xml:lang="en">This paper presents a review of algorithmic transforms called High Level Transforms for IBM, Intel and ARM SIMD multi-core pro-cessors to accelerate the implementation of low level image pro-cessing algorithms. We show that these optimizations provide a significant acceleration. A first evaluation of 512-bit SIMD Xeon-Phi is also presented. We focus on the point that the combination of optimizations leading to the best execution time cannot be pre-dicted, and thus, systematic benchmarking is mandatory. Once the best configuration is found for each architecture, a comparison of these performances is presented. The Harris points detection opera-tor is selected as being representative of low level image processing and computer vision algorithms. Being composed of five convolu-tions, it is more complex than a simple filter and enables more op-portunities to combine optimizations. The presented work can scale across a wide range of codes using 2D stencils and convolutions.</div>
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