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基于区域关系图的图像显示适配技术 被引量：3

Image Retargeting Based on Region Relation Graph
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摘要 图像显示适配技术用于改编图像,以适应在不同尺寸和长宽比的目标屏幕上展示.其中,面向移动设备的图像显示适配面临展示面积受限、长宽比不固定等问题,已经成为多媒体领域的研究热点之一.针对现有方法的缺陷,提出了一种基于区域关系图的图像显示适配方法.首先,根据视觉关注程度和加权梯度分别计算出图像的重要度能量模板和敏感度能量模板.然后,将原始图像分解为曲边梯形网格,并进一步表示为区域关系图.在区域关系图基础上,图像显示适配被规约为用能量模板约束的二次规划问题,通过优化关键网格顶点重定位来生成重要物体突出且视觉扭曲不明显的目标图像.实验结果表明,该方法在图像显示适配中可以取得较好的效果. Image retargeting techniques aim to adapt images to the target screens with different sizes and aspect ratios. Unfortunately, image retargeting for mobile device screens suffers from the problems of limited display area and various aspect ratios. This has been one of the hot topics in multimedia research. This paper proposes a novel image retargeting approach based on region relation graph. First, energy map and sensitivity energy maps are calculated by visual attention and weighted gradient, respectively. Then, the original image is decomposed into curve-edge trapezoid meshes, further represented by region relation graph. Based on the region relation graph, image retargeting is formulated as a quadratic programming problem constrained by energy maps, which emphasizes the important image parts and reduces the visual distortion by optimally relocating the key mesh vertexes. Finally, the target image is generated based on the optimal solution. Experimental results show the effective and efficiency of the proposed approach.
作者 任桐炜 刘焱 武港山
机构地区 南京大学计算机科学与技术系 香港理工大学计算学系
出处 《软件学报》 EI CSCD 北大核心 2010年第9期2237-2249,共13页 Journal of Software
基金 国家自然科学基金Nos.60533080 60721002 60975043 香港研资局优配研究金No.PolyU 5204/09E~~
关键词 图像显示适配 区域关系图 多能量模板约束 曲边梯形网格表示 预缩放 image retargeting region relation graph multiple energy map constraint curve-edge trapezoid mesh representation preliminary scaling
分类号 TP301 [自动化与计算机技术—计算机系统结构]
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参考文献19

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同被引文献44

  • 1时健 郭延文 杜振龙等.一种基于网格参数化的图像适应方法.软件学报,2008,19(1):19-30.
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  • 7Ren T W, Liu v . Wu G S. Image retargeting using multi-map constrained region warping[CJ JjProceedings of the 17th ACM International Conference on Multimedia. New York: ACM Press, 2009: 853-856.
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软件学报
2010年 第9期

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