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1. WO1997028654 - CHROMA KEYING STUDIO SYSTEM

Publication Number WO/1997/028654
Publication Date 07.08.1997
International Application No. PCT/IB1997/000219
International Filing Date 29.01.1997
Chapter 2 Demand Filed 08.08.1997
IPC
H04N 5/222 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
5Details of television systems
222Studio circuitry; Studio devices; Studio equipment
H04N 5/272 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
5Details of television systems
222Studio circuitry; Studio devices; Studio equipment
262Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects
272Means for inserting a foreground image in a background image, i.e. inlay, outlay
H04N 9/75 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
9Details of colour television systems
64Circuits for processing colour signals
74for obtaining special effects
75Chroma key
CPC
G09G 2340/10
GPHYSICS
09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
2340Aspects of display data processing
10Mixing of images, i.e. displayed pixel being the result of an operation, e.g. adding, on the corresponding input pixels
G09G 2340/12
GPHYSICS
09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
2340Aspects of display data processing
12Overlay of images, i.e. displayed pixel being the result of switching between the corresponding input pixels
G09G 2340/125
GPHYSICS
09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
2340Aspects of display data processing
12Overlay of images, i.e. displayed pixel being the result of switching between the corresponding input pixels
125wherein one of the images is motion video
G09G 2340/14
GPHYSICS
09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
2340Aspects of display data processing
14Solving problems related to the presentation of information to be displayed
G09G 5/026
GPHYSICS
09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
5Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
02characterised by the way in which colour is displayed
026Control of mixing and/or overlay of colours in general
H04N 5/222
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
5Details of television systems
222Studio circuitry; Studio devices; Studio equipment ; ; Cameras comprising an electronic image sensor, e.g. digital cameras, video cameras, TV cameras, video cameras, camcorders, webcams, camera modules for embedding in other devices, e.g. mobile phones, computers or vehicles
Applicants
  • RT-SET LTD. [IL]/[IL]
Inventors
  • TZIDON, Aviv
  • TZIDON, Dekel
Agents
  • FRIEDMAN, Mark, M.
Priority Data
08/595,31101.02.1996US
08/688,30030.07.1996US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) CHROMA KEYING STUDIO SYSTEM
(FR) SYSTEME D'INCRUSTATION COULEUR EN STUDIO
Abstract
(EN)
A video system is described which creates a virtual shadow of a foreground object filmed in front of a blue screen with a main video camera. The virtual shadow is created using a second video camera located as a virtual light source. Images from both cameras are processed by a chroma keyer to separate the foreground object. The video image from the second camera is processed to create the virtual shadow and both video images are combined with background image. Object location and actor prompting systems are described to enable an actor to easily find his way around the set, and to focus his gaze on the virtual objects appearing in or disappearing from the studio. The prompting system gives the actor the timings for various events taking place in the studio. The special markings are completely invisible to the camera and to the home viewers because they are either projected in a chroma-key color, or are only active during virtual blanks of the camera such as the vertical blanking interval or the horizontal blanking interval in an NTSC, PAL, SECAM or other video signal format.
(FR)
L'invention concerne un système vidéo créant une ombre virtuelle d'un objet d'avant-plan filmé en face d'un écran bleu avec une caméra vidéo principale. L'ombre virtuelle est créée au moyen d'une deuxième caméra vidéo placée en tant que source de lumière virtuelle. Les images provenant des deux caméras sont traitées par un dispositif d'incrustation couleur, afin de séparer l'objet d'avant-plan. L'image vidéo provenant de la deuxième caméra est traitée de façon à créer l'ombre virtuelle et les deux images vidéo sont combinées avec une image d'arrière-plan. Des systèmes de localisation d'objet et de guidage d'acteur permettent à l'acteur de trouver facilement son chemin autour de l'ensemble et de fixer son regard sur les objets virtuels apparaissant ou disparaissant du studio. Ce système de guidage donne à l'acteur le minutage des différents événements qui ont lieu dans le studio. Les marquages spéciaux sont totalement invisibles à la caméra, ainsi qu'aux téléspectateurs, soit parce qu'ils sont projetés dans une couleur d'incrustation, soit parce qu'ils ne sont actifs que pendant les suppressions virtuelles de la caméra, telles que l'intervalle de suppression vertical ou l'intervalle de suppression horizontal en NTSC, PAL, SECAM ou dans un autre format de signaux vidéo.
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