| 摘要 |
Disclosed is a screen processing method, comprising: a scanning step of scanning two-dimensionally arranged pixels of an output object image in a main scanning direction and a sub scanning direction so as to extract a pixel value of each pixel; a thresholding step of counting scanning displacements in the main scanning direction and the sub scanning direction according to a screen angle by using two counters working with each other, and of discriminating each pixel position based on counted values of the counting so as to obtain a threshold value of the pixel value corresponding to each pixel position; and an outputting step of referring to a conversion table showing an relation of a output value to an input pixel value, the conversion table corresponding to the obtained threshold value, so as to obtain the multilevel output value corresponding to the extracted pixel value.
|
