A real-time multi-scale 2-D Gaussian filter based on FPGA

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	A real-time multi-scale 2-D Gaussian filter based on FPGA
	Luo HB(罗海波); Gai XQ(盖兴琴); Chang Z(常铮); Hui B(惠斌)
	2014
会议名称	International Symposium on Optoelectronic Technology and Application 2014
会议日期	May 13-15, 2014
会议地点	Beijing, China
关键词	Multi-scale 2-D Gaussian filter Multi-scale 2-D convolution Real-time implementation Parallel pipeline In-place operation CAFIFO FPGA
页码	1-7
中文摘要	Multi-scale 2-D Gaussian filter has been widely used in feature extraction (e.g. SIFT, edge etc.), image segmentation, image enhancement, image noise removing, multi-scale shape description etc. However, their computational complexity remains an issue for real-time image processing systems. Aimed at this problem, we propose a framework of multi-scale 2-D Gaussian filter based on FPGA in this paper. Firstly, a full-hardware architecture based on parallel pipeline was designed to achieve high throughput rate. Secondly, in order to save some multiplier, the 2-D convolution is separated into two 1-D convolutions. Thirdly, a dedicate first in first out memory named as CAFIFO (Column Addressing FIFO) was designed to avoid the error propagating induced by spark on clock. Finally, a shared memory framework was designed to reduce memory costs. As a demonstration, we realized a 3 scales 2-D Gaussian filter on a single ALTERA Cyclone III FPGA chip. Experimental results show that, the proposed framework can computing a Multi-scales 2-D Gaussian filtering within one pixel clock period, is further suitable for real-time image processing. Moreover, the main principle can be popularized to the other operators based on convolution, such as Gabor filter, Sobel operator and so on.
收录类别	EI ; CPCI（ISTP）
产权排序	1
会议录	Proc. Of SPIE 9301, International Symposium on Optoelectronic Technology and Application
会议录出版者	SPIE
会议录出版地	Bellingham, WA
语种	英语
ISSN号	0277-786X
WOS记录号	WOS:000349327100004
内容类型	会议论文
源URL	[http://ir.sia.cn/handle/173321/15331]
专题	沈阳自动化研究所_光电信息技术研究室
推荐引用方式 GB/T 7714	Luo HB,Gai XQ,Chang Z,et al. A real-time multi-scale 2-D Gaussian filter based on FPGA[C]. 见:International Symposium on Optoelectronic Technology and Application 2014. Beijing, China. May 13-15, 2014.