Vascular orientation recognition (VOR) holds widespread applications in biomedical domains such as vascular image processing. Although many methods based on deep learning (DL) running on CPUs have been proposed and ac...
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Vascular orientation recognition (VOR) holds widespread applications in biomedical domains such as vascular image processing. Although many methods based on deep learning (DL) running on CPUs have been proposed and achieved appreciable results, they encounter a speed bottleneck. Therefore, an FPGA-based hardware design scheme is proposed in this paper to achieve high-speed VOR using small circuits. The design employs a streaming processing method for image thresholding and replaces static lookup tables (LUT) with the cordicalgorithm to reduce resource consumption. Additionally, further compression of the angle mapping range is employed to achieve superior hardware resource optimization. Compared to purely software solutions, experimental results obtained with the simulated and actual vascular images demonstrate a 12.9x computational acceleration employing the proposed scheme. Moreover, the proposed scheme, in contrast to hardware implementations based on Lookup Table and Function Approximation, reduces LUT resource consumption by over 60%. Compared with two previous cordicalgorithm studies, the proposed algorithm achieves a 14.6% and 20.5% reduction in LUT resource usage, thus showing enormous potential in real-time medical devices for tracking and computation of main vascular trajectory.
The traditional Direct Digital Synthesis (DDS) is based on the method of ROM look-up table for phase-amplitude conversion, and the signal quality does not meet the high accuracy requirements in the condition of high f...
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ISBN:
(纸本)9781467390880
The traditional Direct Digital Synthesis (DDS) is based on the method of ROM look-up table for phase-amplitude conversion, and the signal quality does not meet the high accuracy requirements in the condition of high frequency resolution, because of phase truncation causing the serious signal deterioration of spectral properties. For the problem, the key research is the application of coordinate rotation digital computer (cordic) algorithm to DDS signal source, and to propose an improvedalgorithm to reduce ROM consuming and iterations, especially in favor of hardware implementation. The design of novel DDS signal source is based on the improved cordic algorithm and the phase accumulator without frequency error. The simulation results show the signal source has advantages of relatively pure frequency spectrum, high SNR and obvious spurious suppression. Accordingly, the new DDS signal source is able to meet high frequency resolution and accuracy requirements simultaneously. The DDS signal source based on the spurious suppression method is easy to implement on FPGA, so it has important practical significance to the design of DDS signal source.
The traditional Direct Digital Synthesis(DDS) is based on the method of ROM look-up table for phase-amplitude conversion, and the signal quality does not meet the high accuracy requirements in the condition of high fr...
详细信息
The traditional Direct Digital Synthesis(DDS) is based on the method of ROM look-up table for phase-amplitude conversion, and the signal quality does not meet the high accuracy requirements in the condition of high frequency resolution, because of phase truncation causing the serious signal deterioration of spectral properties. For the problem, the key research is the application of coordinate rotation digital computer(cordic) algorithm to DDS signal source, and to propose an improvedalgorithm to reduce ROM consuming and iterations, especially in favor of hardware implementation. The design of novel DDS signal source is based on the improved cordic algorithm and the phase accumulator without frequency error. The simulation results show the signal source has advantages of relatively pure frequency spectrum, high SNR and obvious spurious suppression. Accordingly, the new DDS signal source is able to meet high frequency resolution and accuracy requirements simultaneously. The DDS signal source based on the spurious suppression method is easy to implement on FPGA, so it has important practical significance to the design of DDS signal source.
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