| 摘要 |
A method for improving printing quality of a digital image using error diffusion screening including the steps for each pixel in a digital image: a) initialize weighted error diffusion value; b) translate first value (220) of each pixel of the digital image to a second value (916); c) translate the second value of each pixel of the digital image to create a third value (920); d) translate the third value of each pixel of the digital image by adding the error diffusion value (216) to create a fourth value (224); e) generate a quantization value for each pixel in the digital image by using at least one threshold value; f) perform geometrical distribution in space of the first quantization (924) utilizing a first pixel mask (1604) and possibly a second pixel mask for setting pixels in designated areas defined by the pixel masks; and g) update said error diffusion value and go to step (b) till all the pixels of the digital image are treated. |
