Computer graphics processing and selective visual display system – Display peripheral interface input device – Cursor mark position control device
Patent
1995-02-21
1997-01-14
Hjerpe, Richard
Computer graphics processing and selective visual display system
Display peripheral interface input device
Cursor mark position control device
345157, G09G 508
Patent
active
055944698
ABSTRACT:
A system for the control from a distance of machines having displays incls hand gesture detection in which the hand gesture causes movement of an on-screen hand icon over an on-screen machine control icon, with the hand icon moving the machine control icon in accordance with sensed hand movements to effectuate machine control. In one embodiment, TV control led by hand signals includes detecting a single hand gesture and providing a hand icon on the screen along with the provision of icons representing TV controls such as volume, channel, color, density, etc., in which a television camera detects the hand in a noisy background through correlation techniques based on values of local image orientation. In order to trigger the system into operation, a trigger gesture such as the "how" sign is distinguished from the background through the utilization of orientation angle differences. From correlation values based on correlating local orientations between a mask defining a particular hand and the later acquired image of the hand, normalized correlation scores for each pixel are obtained, with the correlation peak being detected and then thresholded to eliminate false alarms.
REFERENCES:
patent: 4988981 (1991-01-01), Zimmerman
patent: 5168531 (1992-12-01), Sigel
patent: 5202961 (1993-04-01), Mills et al.
Freeman William T.
Weissman Craig D.
Hjerpe Richard
Liang Regina
Mitsubishi Electric Information Technology Center America Inc.
Tendler, Esq. Robert K.
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