a gpu-based matting laplacian solver for high resolution image matting

	a gpu-based matting laplacian solver for high resolution image matting
	Huang Mengcheng ; Liu Fang ; Wu Enhua
刊名	VISUAL COMPUTER
	2010
卷号	26 期号:40702 页码:943-950
关键词	Image matting Matting Laplacian Conjugate gradient solver GPU
ISSN号	0178-2789
学科主题	Computer Science ; Software Engineering
WOS记录号	WOS:000278135800054
公开日期	2011-05-23
附注	The recently proposed matting Laplacian (Levin et al., IEEE Trans. Pattern Anal. Mach. Intell. 30(2):228-242, 2008) has been proven to be a state-of-the-art method for solving the image matting problem. Using this method, matting is formulated as solving a high-order linear system which is hard-constrained by the input trimap. The main drawback of this method, however, is the high computational cost. As the size of the input image increases, the matting Laplacian becomes expensive to solve in terms of both memory and computational time. In this paper we propose a GPU-based matting Laplacian solution which is dramatically faster than a conventional CPU solution, and at the same time largely reduces the memory consumption, making this method practical for the first time for high resolution image matting. To achieve this end, we employ a novel hierarchical windowing scheme to approximate the global optimal solution by solving a serial of local regions at multiple scales. We further employ a GPU-based local solver which can efficiently evaluate local solutions under various boundary conditions. Experimental results show that our system in general is more than two orders of magnitude faster than traditional CPU-based solvers, with about 80% less memory footprint.
内容类型	期刊论文
源URL	[http://124.16.136.157/handle/311060/9654]
专题	软件研究所_计算机科学国家重点实验室 _期刊论文
推荐引用方式 GB/T 7714	Huang Mengcheng,Liu Fang,Wu Enhua. a gpu-based matting laplacian solver for high resolution image matting[J]. VISUAL COMPUTER,2010,26(40702):943-950.
APA	Huang Mengcheng,Liu Fang,&Wu Enhua.(2010).a gpu-based matting laplacian solver for high resolution image matting.VISUAL COMPUTER,26(40702),943-950.
MLA	Huang Mengcheng,et al."a gpu-based matting laplacian solver for high resolution image matting".VISUAL COMPUTER 26.40702(2010):943-950.