PROJECTOR AND DISTANCE MEASURING METHOD THEREOF
PROBLEM TO BE SOLVED: To provide a projector apparatus reduced in size and improved in measuring accuracy of the distance up to a screen by using a combination of a distance measuring apparatus of active system and a distance measuring apparatus of passive system. SOLUTION: Using distance measuring...
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| creator | AKIYAMA KAZUYUKI |
| description | PROBLEM TO BE SOLVED: To provide a projector apparatus reduced in size and improved in measuring accuracy of the distance up to a screen by using a combination of a distance measuring apparatus of active system and a distance measuring apparatus of passive system. SOLUTION: Using distance measuring data from the projector apparatus 2 to the approximate center region of the screen 1 which is measured by the active distance measuring apparatus 20 as reference, measuring data of the passive distance measuring apparatuses 30, 40 having values within a predetermined range from the distance measuring data are selected and angle operation is performed. Accordingly, the measuring data of a screen edge having high possibility of including an error in the measured data are removed, and only the distance measuring data of the approximate center region of the screen 1 and its peripheral portion in which high-accuracy data is acquired are used. Thus, high-accuracy angle operation is performed and a projected image is highly accurately corrected. COPYRIGHT: (C)2005,JPO&NCIPI |
| format | Patent |
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SOLUTION: Using distance measuring data from the projector apparatus 2 to the approximate center region of the screen 1 which is measured by the active distance measuring apparatus 20 as reference, measuring data of the passive distance measuring apparatuses 30, 40 having values within a predetermined range from the distance measuring data are selected and angle operation is performed. Accordingly, the measuring data of a screen edge having high possibility of including an error in the measured data are removed, and only the distance measuring data of the approximate center region of the screen 1 and its peripheral portion in which high-accuracy data is acquired are used. Thus, high-accuracy angle operation is performed and a projected image is highly accurately corrected. 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SOLUTION: Using distance measuring data from the projector apparatus 2 to the approximate center region of the screen 1 which is measured by the active distance measuring apparatus 20 as reference, measuring data of the passive distance measuring apparatuses 30, 40 having values within a predetermined range from the distance measuring data are selected and angle operation is performed. Accordingly, the measuring data of a screen edge having high possibility of including an error in the measured data are removed, and only the distance measuring data of the approximate center region of the screen 1 and its peripheral portion in which high-accuracy data is acquired are used. Thus, high-accuracy angle operation is performed and a projected image is highly accurately corrected. COPYRIGHT: (C)2005,JPO&NCIPI</abstract><edition>7</edition><oa>free_for_read</oa></addata></record> |
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| subjects | ACCESSORIES THEREFOR APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM CINEMATOGRAPHY ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY ELECTROGRAPHY GYROSCOPIC INSTRUMENTS HOLOGRAPHY MEASURING MEASURING ANGLES MEASURING AREAS MEASURING DISTANCES, LEVELS OR BEARINGS MEASURING IRREGULARITIES OF SURFACES OR CONTOURS MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS NAVIGATION PHOTOGRAMMETRY OR VIDEOGRAMMETRY PHOTOGRAPHY PHYSICS PICTORIAL COMMUNICATION, e.g. TELEVISION SURVEYING TESTING |
| title | PROJECTOR AND DISTANCE MEASURING METHOD THEREOF |
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