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不产生精度截断及数据膨胀的图像金字塔

DOI: 10.11834/jig.20090609

Keywords: 精度截断,数据膨胀,图像金字塔,均值金字塔,高斯金字塔

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Abstract:

图像金字塔是处理和分析数字图像的重要工具。以图像金字塔为研究对象,旨在减小图像金字塔的存储量,同时解决恢复数据时的精度截断问题。从同一思想出发,提出了两种新的金字塔结构:类均值金字塔与类高斯金字塔;它们都是通过对子像素的简单运算来求得父像素,而这种运算不存在精度截断问题,也不需要额外的比特来保存小数。由于从父像素能够反推出它的子像素之一,所以,在存储金字塔时可以舍弃这部分子像素,从而使所需存储的像素数仅与原始图像相同。对精度、存储量以及构建速度的理论分析与实验结果表明,该金字塔结构具有优良的总体性能。

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