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Error diffusion halftoning method for dark ink and light ink channels, based on a measure of solvent quantity that should be ejected for each pixel, and apparatus that performs the halftoning method
Error diffusion halftoning method for dark ink and light ink channels, based on a measure of solvent quantity that should be ejected for each pixel, and apparatus that performs the halftoning method
An image processing method suitable for a printer unit, includes an error diffusion halftoning process arranged for quantizing and diffusing each pixel of an image including a set of subtractive primary colors (C′, M′, Y′), in an image including a quantized printer image including a set of ink drops (DC, DM, DY, Dc, Dm) of respective ink channels to be printed. The method comprises the step of determining, for each pixel, an input variable value (S) representing a measure of solvent quantity that should be ejected by the printer unit for each pixel, the input variable value being computed on the basis of the value of a corresponding pixel of the image including the set of subtractive primary colors (C′, M′, Y′), and of inputting the determined input variable value (S) in the error diffusion halftoning process together with the values of the corresponding pixel. The invention further relates to the apparatus embodying the method.
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机译:一种适合于打印机单元的图像处理方法,包括误差扩散半色调处理,该误差扩散半色调处理被布置为在包括量化图像的图像中量化和扩散包括减色原色(C',M',Y')的图像的每个像素。打印机图像,包括一组墨滴(D C Sub>,D M Sub>,D Y Sub>,D c Sub>,D m Sub>)分别打印的墨水通道。该方法包括以下步骤:对于每个像素,确定代表打印机量应该为每个像素喷射的溶剂量的量度的输入变量值(S),该输入变量值是基于像素的值来计算的。图像的相应像素包括一组减色原色(C',M',Y'),并且在误差扩散半色调处理中输入确定的输入变量值(S)以及相应像素的值。本发明还涉及体现该方法的设备。
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