Television – Video display – Projection device
Patent
1995-11-30
1998-06-09
Powell, Mark R.
Television
Video display
Projection device
348745, 348806, H04N 322, H04N 326, H04N 323, H04N 2223
Patent
active
057643113
ABSTRACT:
The present invention provides an image processing apparatus for use with an image projector to allow the image projector to project a magnified image on a screen without a trapezoid distortion or a keystone distortion even when a normal line of the screen is declined to an optical axis of a projector lens of the projector. Digital image data from AD converter are stored in the image memory (6-9) through a selector (3). From the image memory, the image data of four pixels nearby a deformed coordinate position are read out through a selector (4). The image data of the deformed coordinate position is obtained by calculating an average of sum of arithmetic results obtained by giving a weight to each of image data of the four pixels. The weight given corresponds to a positional deviation value from the deformed coordinate position to the respective coordinate positions of the four pixels nearby the deformed coordinate position.
REFERENCES:
patent: 4656521 (1987-04-01), Trzeciak et al.
patent: 4706115 (1987-11-01), Colineau et al.
patent: 4714428 (1987-12-01), Bunker et al.
patent: 5426471 (1995-06-01), Tanaka et al.
patent: 5465121 (1995-11-01), Blalock et al.
Bonde Hiroyuki
Machida Toyotaka
Meller Michael N.
Powell Mark R.
Srivastava Vivek
Victor Company of Japan Ltd.
LandOfFree
Image processing apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Image processing apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Image processing apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2206614