電子写真におけるデジタル・カラー・プリンティングの中間調再現法（Ⅲ）

—カラー化について（特にIH法とスクリーン角について）—

抄録

In general, it is difficult to get both good halftone levels and resolution on low resolution printer.
To solve this problem we selected dither threshold matrix which is small size in resolution unit and large size in gray level unit, and making same threshold data in a pair of matrices comprising in the diagonal position and using multi-level output of laser pulse width modulation, we could achieve good halftone reproduction. We call the procedure “Improved Halftone (I. H.) Method”.
Using this I H Method, we could expand to the case with screen angles, and get high quality full-color print output consist of yellow, magenta, cyan and black toners on laser beam printer.