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• W2560622264 abstract "High-level synthesis (HLS)-based design methodologies are extremely viable for industries that are sensitive to production costs. In order to have competitive advantage, the ability to have several different implementations of the same algorithm satisfying a diverse range of resolution, cost, and performance constraints is highly desirable. In this paper, we present multiple hardware implementations of the semi-global matching (SGM) algorithm, which is used in stereo vision systems, e.g., for automotive applications. The hardware platform considered in this paper is a Xilinx Zynq system-on-chip. A performance comparison of both HLS-based design and a manual register transfer level (RTL) design in terms of quality of results, flexibility, and design time is also presented. SGM mainly includes a sequence of three processing steps, i.e., the “cost cube calculation” followed by the “path cost computation” and finally the “disparity approximation and minimization”. The path cost processor further performs a pixel-wise processing of the cost cube data along eight distinct path orientations. The baseline algorithmic model usually called the “golden” model utilizes considerably large arrays that are required to be mapped to an external DRAM and brought into the on-chip RAM when required. This necessitates adding both the memory transfer loops as well as insertion of calls to the AXI transactors for accessing the DRAM through the on-chip DDR slave. Furthermore, the initial algorithm (typically single-threaded) must be parallelized to fully exploit the concurrency offered by the target hardware platform. The design space exploration was thus performed by making several considerably different micro-architectural choices. Eventually, we were able to obtain an implementation comparable with the manual RTL design. Both the manual RTL and the HLS designs achieved the target real-time performance of 30 frames/s for the image resolution of 640×480 with a disparity depth of 128 pixels per frame." @default.
• W2560622264 created "2016-12-16" @default.
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• W2560622264 date "2017-01-01" @default.
• W2560622264 modified "2023-09-29" @default.
• W2560622264 title "High-Level Synthesis for Semi-Global Matching: Is the Juice Worth the Squeeze?" @default.
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• W2560622264 doi "https://doi.org/10.1109/access.2016.2635378" @default.
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