AUTOMATIC CORRECTION OF KEYSTONE DISTORTION AND OTHER UNWANTED ARTIFACTS IN PROJECTED IMAGES
First Claim
1. Projected image correction apparatus, comprising:
- a device including a display processor and a projector operative to project an image onto a surface;
a sensor operative to view the projected image on the surface; and
electronic circuitry operative to communicate information to the display processor about the image viewed by the sensor, enabling the display processor to correct for one or more of the following defects in the projected image;
keystone effects or incorrect aspect-ratio;
brightness or contrast variations;
incorrect color rendition, saturation or hue;
poor focus or sharpness;
ormotion artifacts caused by movement of the device.
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Accused Products
Abstract
A system for manual or automatic correction of geometric or video image distortions introduced by projection onto obliquely angled or imperfect surfaces. Sensors may be disposed at the projector itself, at the projected image surface, or in a portable remote-control unit. Corrections may be applied as part of an original set-up process, or dynamically as the configuration changes. Image-stabilization techniques are utilized where applicable, as is the use of test patterns and the incorporation of “helper” signals into the video image. Tactile-sensing capabilities provide an interactive environment, and various packaging configurations for projection units and sensor provisions are disclosed.
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Citations
23 Claims
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1. Projected image correction apparatus, comprising:
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a device including a display processor and a projector operative to project an image onto a surface; a sensor operative to view the projected image on the surface; and electronic circuitry operative to communicate information to the display processor about the image viewed by the sensor, enabling the display processor to correct for one or more of the following defects in the projected image; keystone effects or incorrect aspect-ratio; brightness or contrast variations; incorrect color rendition, saturation or hue; poor focus or sharpness;
ormotion artifacts caused by movement of the device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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Specification