RESCALING AND/OR RECONSTRUCTING IMAGE DATA WITH DIRECTIONAL INTERPOLATION
    1.
    发明申请
    RESCALING AND/OR RECONSTRUCTING IMAGE DATA WITH DIRECTIONAL INTERPOLATION 审中-公开
    使用方向插值来重构和/或重构图像数据

    公开(公告)号:WO2017040279A1

    公开(公告)日:2017-03-09

    申请号:PCT/US2016/048983

    申请日:2016-08-26

    CPC classification number: G06T3/4007 G06K9/4647 G06K9/56 G06T3/4015 G06T3/403

    Abstract: Rescaling or reconstructing of a digital image may be accomplished by directional interpolation, so that interpolation is done in the direction perpendicular to the gradient--the direction in which the change in pixel values is the smallest. Each pixel is generated by interpolation in the output image as a weighted average of nearby pixels, in which the weighting is done in the direction of the gradient. The interpolation is accomplished with an adaptive filter that has an elliptical frequency response determined by the direction of the gradient. The filter uses filter coefficients that are a function of the direction. Rather than storing coefficients for each of several directions, three filter coefficients are stored―one set for non-directional filter, one for one direction such as 45 degrees, and another for another direction such as 135 degrees. A blending of the filter coefficients is used.

    Abstract translation: 可以通过方向插值来实现数字图像的重新缩放或重建,使得在垂直于梯度的方向(像素值的变化最小的方向)上进行插值。 每个像素通过输出图像中的内插生成为邻近像素的加权平均值,其中在梯度方向上进行加权。 使用具有由梯度方向确定的椭圆频率响应的自适应滤波器来完成内插。 滤波器使用作为方向函数的滤波器系数。 不是存储几个方向中的每一个的系数,而是存储三个滤波器系数,一个用于无方向滤波器,一个针对一个方向,例如45度,另一个用于另一个方向,例如135度。 使用滤波器系数的混合。

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