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    题名: Fast bitmap images resizing based on human visual system
    其它题名: 基於視覺反應之快速影像縮小與放大
    作者: 黃連進;Hwang, Lain-jinn
    贡献者: 淡江大學資訊工程學系博士班
    趙榮耀;Chao, Louis R.
    关键词: 人類視覺系統;視覺尖銳區域;影像縮放;多項式片段趨近法;像點複製;隨機像點複製;羅森編碼;Human Visual System;Region Of Sharp Area;Image Resize;Piecewise Polynomial Approximation;Pixel Replication;Random Pixel Replication;Rothstein code
    日期: 2005
    上传时间: 2010-01-11 05:59:31 (UTC+8)
    摘要: 人類視覺在影像處理扮演重要關鍵。然而,依據幾何光學,我們發現眼睛並不是一個完美的光學系統,它的清晰區域非常小。所以,設計完美的影像產生系統,如果超出眼睛所能感知的能力,將會造成浪費。

    Human Visual System plays an important factor in image processing.
    However, based on geometric optics, we found the eye is not a
    perfect optical system; its “Region of Sharp Area” is very small.
    Therefore, it would be wasteful to design a system with perfect image render of which the eye could not utilize.

    Based on this result, we introduce three kinds of applications.
    First, we investigated a “Region Of Sharp Area” render, with this scheme,
    we have successfully speeded up the 3D scenes generation. Secondly, we
    proposed a “Multiple Resolution Image Compression” algorithm,
    with this method, we have successfully improved the image compression ratio.
    Thirdly, we develop a fast image resizing scheme that produces
    significantly improved quality over the pixel replication method.
    This algorithm is suitable for real-time image resizing applications
    including: Virtual Reality, Optical Character Recognition, Symbol Recognition, and Car License Plate Recognition. Although this method produced “jaggies” at the edges in the resized image, the execution time is about 22 to 40 times fast than the Windows and the Weiman scheme, respectively. This scheme doesn''t use floating-point operations and buffer area, so, it is suitable for image viewer based on embedded system, such as Portable Digital Assistant.
    显示于类别:[資訊工程學系暨研究所] 學位論文


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