边缘自适应的四点分段抛物线图像缩放

doi:10.3785/j.issn.1008-973X.2010.09.002

2010, Vol. 44

Issue (9): 1637-1642 DOI: 10.3785/j.issn.1008-973X.2010.09.002

自动化技术、计算机技术

边缘自适应的四点分段抛物线图像缩放

丁勇,王翔,严晓浪

浙江大学超大规模集成电路设计研究所,浙江杭州 310027

Edge adaptive four-point piecewise parabolic scaler implementation

DING Yong, WANG Xiang, YAN Xiao-lang

Institute of VLSI Design, Zhejiang University, Hangzhou 310027, China

全文: PDF

摘要：

为了解决数字视频图像缩放技术中的边缘模糊或细节退化等问题,实现图像的无级非线性缩放,提升插值算法的性能,提出一种边缘自适应的四点分段抛物线插值的图像缩放方法,通过对图像的边缘像素以及靠近边缘的邻近像素的自适应插值,避免或抑制边缘模糊、锯齿状边缘、对比度和亮度下降等现象.在硬件实现中,采用基于Farrow结构的VLSI电路结构,硬件复杂度大大降低.实验结果表明:此算法的性能接近于3次插值,而硬件复杂度明显低于后者.

关键词： ; 边缘自适应插值; 图像缩放; 分段抛物线; 插值

Abstract:

The common difficulty with conventional interpolation techniques is to preserve the details in image, i.e. edges, so how to interpolate the pixels along or nearby edges becomes a core problem of scaling algorithms. To deal with this problem, an edge adaptive fourpoint piecewise parabolic scaling algorithm was presented in this paper, in which the pixels along or nearby edges were interpolated by edge direction oriented method. In hardware implementation, an efficient VLSI architecture based on Farrow structure was developed. Experimental results show that the proposed algorithm can achieve arbitrary expansion as well as preserving edges in image, and its hardware cost is lower than that of the cubic interpolation algorithm.

Key words: edge adaptive interpolation scaler piecewise parabola

出版日期: 2010-10-10

TP 752

基金资助:

国家“863”高技术研究发展计划资助项目(2009AA011706).

作者简介: 丁勇(1974-), 男, 山东青岛人, 高级工程师, 从事数字音视频SoC研究. E-mail: dingy@vlsi.zju.edu.cn

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引用本文:

丁勇, 王翔, 严晓浪. 边缘自适应的四点分段抛物线图像缩放[J]. J4, 2010, 44(9): 1637-1642.

DING Yong, WANG Xiang, YAN Xiao-Lang. Edge adaptive four-point piecewise parabolic scaler implementation. J4, 2010, 44(9): 1637-1642.

链接本文:

http://www.zjujournals.com/xueshu/eng/CN/10.3785/j.issn.1008-973X.2010.09.002 或 http://www.zjujournals.com/xueshu/eng/CN/Y2010/V44/I9/1637

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