Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Adalia LimitedfiledCriticalAdalia Limited
Publication of CH325493ApublicationCriticalpatent/CH325493A/fr
H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
H04N1/46—Colour picture communication systems
H04N1/56—Processing of colour picture signals
H04N1/60—Colour correction or control
H04N1/6016—Conversion to subtractive colour signals
H04N1/6022—Generating a fourth subtractive colour signal, e.g. under colour removal, black masking
G—PHYSICS
G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
G03B27/00—Photographic printing apparatus
G03B27/72—Controlling or varying light intensity, spectral composition, or exposure time in photographic printing apparatus
Landscapes
Physics & Mathematics
(AREA)
Spectroscopy & Molecular Physics
(AREA)
General Physics & Mathematics
(AREA)
Engineering & Computer Science
(AREA)
Multimedia
(AREA)
Signal Processing
(AREA)
Color Image Communication Systems
(AREA)
Facsimile Image Signal Circuits
(AREA)
CH325493D1954-04-011955-04-01Procédé de reproduction d'images en couleur et appareil pour la mise en oeuvre de ce procédé
CH325493A
(fr)