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1. WO1990013968 - CONTOUR EMPHASIZING DEVICE FOR TV CAMERA

Publication Number WO/1990/013968
Publication Date 15.11.1990
International Application No. PCT/JP1990/000575
International Filing Date 01.05.1990
IPC
H04N 5/14 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
5Details of television systems
14Picture signal circuitry for video frequency region
H04N 5/208 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
5Details of television systems
14Picture signal circuitry for video frequency region
20Circuitry for controlling amplitude response
205for correcting amplitude versus frequency characteristic
208for compensating for attenuation of high frequency components, e.g. crispening, aperture distortion correction
H04N 9/64 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
9Details of colour television systems
64Circuits for processing colour signals
CPC
H04N 5/142
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
5Details of television systems
14Picture signal circuitry for video frequency region
142Edging; Contouring
H04N 5/208
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
5Details of television systems
14Picture signal circuitry for video frequency region
20Circuitry for controlling amplitude response
205for correcting amplitude versus frequency characteristic
208for compensating for attenuation of high frequency components, e.g. crispening, aperture distortion correction
H04N 9/646
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
9Details of colour television systems
64Circuits for processing colour signals
646for image enhancement, e.g. vertical detail restoration, cross-colour elimination, contour correction, chrominance trapping filters
Applicants
  • IKEGAMI TSUSHINKI CO., LTD. [JP]/[JP] (DE)
  • KAWADA, Norihiko [JP]/[JP] (UsOnly)
  • IOKA, Shoichi [JP]/[JP] (UsOnly)
  • DEGAWA, Katsumi [JP]/[JP] (UsOnly)
  • FUJISHIMA, Keiichi [JP]/[JP] (UsOnly)
Inventors
  • KAWADA, Norihiko
  • IOKA, Shoichi
  • DEGAWA, Katsumi
  • FUJISHIMA, Keiichi
Agents
  • SASAJIMA, Fujio
Priority Data
1/10775428.04.1989JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) CONTOUR EMPHASIZING DEVICE FOR TV CAMERA
(FR) DISPOSITIF DE PREACCENTUATION DE CONTOURS POUR CAMERAS VIDEO
Abstract
(EN)
A contour emphasizing device for TV cameras wherein a level correction circuit is interposed to non-linearly process the video signals from a TV camera to send them to a contour emphasizing circuit. In a region of dark image, the contour is emphasized by the level-enhanced signals, while in a bright region the contour emphasis is properly suppressed to obtain natural image.
(FR)
Dispositif de préaccentuation de contours pour caméras vidéo, dans lequel un circuit de correction de niveau est intercalé pour traiter de manière non linéaire les signaux vidéo provenant d'une caméra vidéo avant de les envoyer à un circuit de préaccentuation de contours. Dans une région sombre de l'image, le contour est préaccentué par les signaux à niveau amplifié, alors que dans une région lumineuse la préaccentuation de contours est supprimée pour obtenir une image naturelle.
Also published as
DE4090689
Latest bibliographic data on file with the International Bureau