Bildverarbeitungsverfahren und Bildverarbeitungsvorrichtung für Gray-Ausgangssignal

Details

Veröffentlichungs-Nr.

EP3160121

Aktenzeichen

EP16194555

Anmeldetag

19. Oktober 2016

Veröffentlichung

5. Februar 2020

Erteilung

5. Februar 2020

Rechtsraum

EP

IPC

H04N1/40H04N1/60

Abstract

An image processing method comprising: converting an RGB input signal to a CMYK signal; converting the RGB input signal to a common color signal including lightness; generating a first Gray signal including a Gray value substituted for CMY values forming gray in the CMYK signal; generating a second Gray signal including a Gray value corresponding to a K value greater than a threshold in the CMYK signal; generating a Gray output signal in a CMYKGray output signal indicating color material amounts of cyan (C), magenta (M), yellow (Y), black (K), and gray (Gray) for printing by multiplying the generated first Gray signal and the generated second Gray signal respectively by coefficients corresponding to the lightness in the common color signal and then synthesizing the first Gray signal and the second Gray signal.

Anmelder

Firma

Riso Kagaku Corporation

Land

🇯🇵 Japan

Fachgebiete