MOTION DETECTOR, MOTION DETECTION METHOD AND VIDEO CAMERA SYSTEM

PROBLEM TO BE SOLVED: To obtain a monitor camera system with high reliability by detecting a motion based on a chroma phase angle obtained from a chroma signal component. SOLUTION: A matrix circuit 21 receives RGB data from an A/D converter circuit 13 and extracts luminance signal data and chroma si...

Full description

Saved in:
Bibliographic Details
Main Author NAGANUMA KAZUTO
Format Patent
LanguageEnglish
Published 23.01.1998
Edition6
Subjects
ALARM SYSTEMS
CALCULATING
COMPUTING
COUNTING
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
ORDER TELEGRAPHS
PHYSICS
PICTORIAL COMMUNICATION, e.g. TELEVISION
SIGNALLING
SIGNALLING OR CALLING SYSTEMS
Online AccessGet full text

Cover

More Information
Summary:PROBLEM TO BE SOLVED: To obtain a monitor camera system with high reliability by detecting a motion based on a chroma phase angle obtained from a chroma signal component. SOLUTION: A matrix circuit 21 receives RGB data from an A/D converter circuit 13 and extracts luminance signal data and chroma signal data consisting of IQ signals. Then the chroma data are distributed to chroma phase angle arithmetic circuits 22, 26. The circuits 22, 26 receive the chroma signal data in the unit of picture elements and conduct arithmetic processing to calculate a phase angle, which is fed to gate circuits 23, 27. The circuits 23, 27 extract a signal within a prescribed frame of upper and lower halves of one image. Integration circuits 24, 28 integrate an information signal of the phase angle with each frame fed from the circuits 23, 27 to obtain a mean chroma phase angle. Switch circuits 25, 29 output an output of the circuits 24, 28 to a microcomputer as an evaluation value of a frame unit. The microcomputer generates and stores a reference value based on the evaluation value and compares it with a current evaluation value to detect a motion in the unit of frames.
Bibliography:Application Number: JP19960186890