Method And Device For Representing A Digital Image On A Surface Which Is Non-Trivial In Terms Of Its Geometry And Photometry
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Abstract
The invention relates to a method and a device for representing a two-dimensional digital image on a projection surface, whereby at least one projector projects the content of an image buffer onto the projection surface. The aim of the invention is to provide a method and a device which allow to project a digital image onto a background having any surface structure and/or color in such a manner that any influences on the image caused by the background are compensated to the last pixel for at least one special observer perspective. In a special embodiment, definition of the representation is optimized to the last pixel even on an uneven background. For this purpose, the digital image is processed during a rendering step by geometrically distorting it using a two-dimensional pixel-offset field which contains information on the projection surface, and by manipulating the color of the image by means of a two-dimensional surface texture of the projection surface. A least a part of the processed image is rendered in an image buffer and a rectangle is written into the image buffer for initiating the rendering step, thereby compensating scattered light influences. The invention especially relates to a system comprising a plurality of projectors. Definition of representation can be optimized to the last pixel by means of definition values and representation is furthermore possible subject to the observer'"'"'s position.
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Citations
82 Claims
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1-41. -41. (canceled)
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42. A method of representing a digital image on a projection surface, comprising:
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processing said digital image to create a processed image, said processing including geometric distortion of said digital image using a two-dimensional pixel displacement map that contains information about said projection surface and/or color manipulation using a two-dimensional surface texture of said projection surface; and
rendering at least a part of the processed image into an image buffer; and
projecting a content of the image buffer onto said projection surface by at least one projector. - View Dependent Claims (43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72)
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73. An apparatus for representing a digital image on a projection surface, comprising:
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a control unit;
an image buffer;
at least one projector; and
a camera, said projector and said camera being coupled to the control unit that processes said digital image during a rendering process, said control unit configured to conduct geometric distortion using a two-dimensional pixel displacement map that contains information about said projection surface and/or manipulates color using a two-dimensional surface texture of said projection surface, at least a part of the processed image being rendered into the image buffer. - View Dependent Claims (74, 75, 76, 77, 78, 79, 80, 81, 82)
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Specification