Computer graphics processing and selective visual display system – Image superposition by optical means
Patent
1995-09-15
1998-08-11
Liang, Regina
Computer graphics processing and selective visual display system
Image superposition by optical means
348806, G09G 500
Patent
active
057933405
ABSTRACT:
An adjustment reference point is defined as a point on a screen on which a corresponding adjustment point of an image is projected when the image projected by a CRT system video projector is assumed to have no raster distortion. An image correction apparatus of this invention produces a raster distortion correction data on the basis of a difference between the adjustment reference point and the corresponding adjustment point obtained from a video signal. The video signal is obtained by picking up an predetermined image including an adjustment reference point projected on the screen by using a camera device.
REFERENCES:
patent: 5506481 (1996-04-01), Wada et al.
Hitotsumatsu Akira
Minami Kouji
Morita Takehiko
Ono Yoshiki
Liang Regina
Mitsubishi Denki & Kabushiki Kaisha
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