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1.
公开(公告)号:US5327257A
公开(公告)日:1994-07-05
申请号:US841681
申请日:1992-02-26
CPC分类号: G06F17/175
摘要: Digital image processing apparatus for interpolating a digital input image into an interpolated output image, in one embodiment of the invention, comprises an input buffer (12) for accommodating pixel data of the input image and a coefficient buffer (14) for storing precalculated interpolation weighting coefficients prior to real time image interpolation. The coefficient buffer (14) comprises a first memory segment (22) for containing a set of precalculated sharp interpolating weighting coefficients obtained by using a sharp interpolating algorithm, a second memory segment (24) for containing a set of precalculated soft weighting coefficients obtained by using a soft interpolating algorithm and a third memory segment (26) for containing a set of precalculated weighting coefficients representative of a predetermined characteristic of the input image, such as contrast or density. The processing apparatus further comprises interpolation logic (16) for calculating a sharp interpolated output image pixel, a soft interpolated output image pixel, and a value for the image characteristic, using the input pixel data and the precalculated weighting coefficients, and an algorithm implementation controller (18) for calculating a resultant output pixel by combining the sharp and soft interpolated pixel values as a function of the image characteristic.
摘要翻译: 在本发明的一个实施例中,用于将数字输入图像内插到内插输出图像中的数字图像处理装置包括用于容纳输入图像的像素数据的输入缓冲器(12)和用于存储预先计算的内插加权的系数缓冲器(14) 系数在实时图像插值之前。 系数缓冲器(14)包括第一存储器段(22),用于包含通过使用尖锐内插算法获得的一组预先计算的尖锐内插加权系数;第二存储器段(24),用于包含一组预先计算的软加权系数, 使用软内插算法和第三存储器段(26),用于包含表示输入图像的预定特性(诸如对比度或密度)的一组预先计算的加权系数。 处理装置还包括使用输入像素数据和预先计算的加权系数来计算尖锐内插输出图像像素,软内插输出图像像素和图像特性值的内插逻辑(16),以及算法实现控制器 (18),用于通过组合作为图像特征的函数的锐利和软内插像素值来计算结果输出像素。