Invention Grant
US08369614B2 Edge control in a digital color image via tone and size dependent dilation of pixels 有权
通过色调和尺寸依赖的像素扩展,数字彩色图像中的边缘控制

Edge control in a digital color image via tone and size dependent dilation of pixels
Abstract:
What is disclosed is a novel system and method for calculating an amount of a total dilation for reverse objects in order to compensate for fill-in effects to improve quality of a digital image in a digital document reproduction system. In a manner more fully described herein, a tone-dependent compensation factor is determined which is a function of a gamma-corrected background density. The tone-dependent compensation factor is then used to scale the maximum base dilation to produce an amount of total dilation. The total dilation amount is applied to contone pixels along an edge of the reverse object to compensate for fill-in artifact effects. By adjusting pixels along the edges of reverse objects by the total dilation determined hereby, the sharpness (or crispness) of reverse fine features is improved on sweeps and for hue shifts at the edges of the reverse objects on backgrounds of more than one color separation.
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