Seiichiro Hiratsuka

Reversible coding method, reversible coding apparatus, and memory medium used therein

Color separating device and color image reading device incorporating same

Image forming device for enhancing tone reproduction by changing dot size

Color adjustment method for pixels of color images that designates color and corresponding adjustment colors

Image processing separately processing two-density-level image data and multi-level image data

Halftone image forming apparatus including density based dot enlargement

Device and method for reversible encoding

Image forming arrangement for high quality image printing - uses shade reproduction and prevents resolution degradation and moire pattern formation using pixel position prioritisation

Method and apparatus for three-dimensional signal conversion

Image compression method