Title:
MOTION DETECTOR, MOTION DETECTION METHOD AND VIDEO CAMERA SYSTEM
Document Type and Number:
Japanese Patent JP3518175
Kind Code:
B2
Abstract:
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.
Inventors:
Naganuma, Kazuto
Application Number:
JP18689096A
Publication Date:
April 12, 2004
Filing Date:
June 28, 1996
Export Citation:
Assignee:
SONY CORP
International Classes:
H04N5/225; G06T7/20; G08B13/196; H04N7/18; H04N9/77; H04N11/04; (IPC1-7): H04N7/18; G08B13/196
Attorney, Agent or Firm:
脇 篤夫 （外１名）
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