GB791675A - Process for the manufacture of a subtractive colour film - Google Patents

Process for the manufacture of a subtractive colour film

Info

Publication number
GB791675A
GB791675A GB23489/55A GB2348955A GB791675A GB 791675 A GB791675 A GB 791675A GB 23489/55 A GB23489/55 A GB 23489/55A GB 2348955 A GB2348955 A GB 2348955A GB 791675 A GB791675 A GB 791675A
Authority
GB
United Kingdom
Prior art keywords
colour
brightness
grey
sets
signals
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
GB23489/55A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB791675A publication Critical patent/GB791675A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
    • G03C7/00—Multicolour photographic processes or agents therefor; Regeneration of such processing agents; Photosensitive materials for multicolour processes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • 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

Abstract

791,675. Copying by scanning. GRETENER, E. Aug. 15, 1955 [Aug. 16, 1954], No. 23489/55. Drawings to Specification. Class 40 (3). In an arrangement for producing a colour motion-picture film, sets of electrical signals individually representative of three component colours in an original are derived by a scanning process and from each of these sets of signals four further sets of signals individually representative of the grey content (brightness) and of the colour residues are derived (e.g. in the manner described in Specification 737,212 and U.S.A. Specification 2,316,581), the grey content signals being recorded on a black/white sensitive layer and the colour residues on colour sensitive layers. This arrangement avoids distortions inherent in conventional subtractive colour recordings (due to overlap of the spectral absorption curves of the subtractive dyes) by representing the brightness variations of the colours by a neutral-tone (grey-content) and the colour (of each image element) by the superimposition of two substractive dyes, the amounts of the latter being independent of the brightness of the colour.
GB23489/55A 1954-08-16 1955-08-15 Process for the manufacture of a subtractive colour film Expired GB791675A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH791675X 1954-08-16

Publications (1)

Publication Number Publication Date
GB791675A true GB791675A (en) 1958-03-12

Family

ID=4537026

Family Applications (1)

Application Number Title Priority Date Filing Date
GB23489/55A Expired GB791675A (en) 1954-08-16 1955-08-15 Process for the manufacture of a subtractive colour film

Country Status (4)

Country Link
CH (1) CH330517A (en)
DE (1) DE1007622B (en)
FR (1) FR1135835A (en)
GB (1) GB791675A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1068558B (en) * 1957-05-15 1959-11-05
BE594676A (en) * 1959-09-03
JPS5522708A (en) * 1978-08-04 1980-02-18 Dainippon Screen Mfg Co Ltd Method and apparatus for recording of color image

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2253086A (en) * 1937-01-16 1941-08-19 Eastman Kodak Co Color photography

Also Published As

Publication number Publication date
DE1007622B (en) 1957-05-02
CH330517A (en) 1958-06-15
FR1135835A (en) 1957-05-03

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