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公开(公告)号：CA2327779A1
公开(公告)日：2001-06-22
申请号：CA2327779
申请日：2000-12-07
Applicant: LUCENT TECHNOLOGIES INC
Inventor： EDMARK JOHN T
Abstract: Although in my co-pending application, so-called "pyramidic panel structures " are employed to adjust the image's vanishing point(s) in accordance with the movement of the user, such structures have the disadvantage that they work primarily for so- called "corridor- like" two-dimensional images. I have recognized that, in accordance with the principles of the invention, viewpoint changes may be also dealt with by partitioning the two-dimensional image into polygon partitions, each corresponding to a surface being depicte d in the image, and then coupling the vertices of the polygon partitions with the movement o f the user so as to limit distortions. In this latter approach, two-dimensional images are not treated as a perspective, corridor-like image, thereby allowing a wider variety of two- dimensional images to be used with the present invention.
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Patent Agency Ranking
公开(公告)号：CA2279100A1
公开(公告)日：2000-03-25
申请号：CA2279100
申请日：1999-07-29
Applicant: LUCENT TECHNOLOGIES INC
Inventor： EDMARK JOHN T
Abstract: A limitation of using two-dimensional images, such as videos or photographs, to represent portions of a three-dimensional world occurs when the user moves within the world and views the world from a location different than from the original context of the two-dimensional image, i.e., from a location different than the image's ideal viewing point (IVP). View changes result in the image not aligning well with the surrounding objects of the three-dimensional world. This limitation is overcome by distorting the twodimensional image so as to adjust the image's vanishing point(s) in accordance with the movement of the user using a pyramidic panel structure. In this manner, as the user moves away from the ideal viewing point, the distortions act to limit the discontinuities between the two-dimensional image and its surroundings. To minimize the depth profile of the pyramidic panel structure, the structure may be segmented into sections and each section translated towards, or away from, the user's viewpoint.
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公开(公告)号：AU753413B2
公开(公告)日：2002-10-17
申请号：AU3500499
申请日：1999-06-11
Applicant: LUCENT TECHNOLOGIES INC
Inventor： CARRARO GIANPAOLO U , EDMARK JOHN T , ENSOR JAMES ROBERT
Abstract: A limitation of a three-dimensional world in which objects in the distance may be represented in only two dimensions as a video on a screen occurs when a computer graphic object represented by computer graphics, e.g., in front of, to the side, above, or below the video screen, undergoes a trajectory that takes it to a location in the world that is not represented as computer graphics, but instead is within the field represented by the video, because such an object would disappear from view by the viewer. This limitation is overcome by having by determining when a computer graphic object undergoes a trajectory that takes it to a location in the world that is not represented as computer graphics, but instead is within the field represented by the video, and representing such an object as computer graphics in front of the screen to which at least one perspective transformation is applied, the perspective transformation being at least a function of the position at which the object is actually located.
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公开(公告)号：AU5010399A
公开(公告)日：2000-03-30
申请号：AU5010399
申请日：1999-09-23
Applicant: LUCENT TECHNOLOGIES INC
Inventor： EDMARK JOHN T
Abstract: A limitation of using two-dimensional images, such as videos or photographs, to represent portions of a three-dimensional world occurs when the user moves within the world and views the world from a location different than from the original context of the two-dimensional image, i.e., from a location different than the image's ideal viewing point (IVP). View changes result in the image not aligning well with the surrounding objects of the three-dimensional world. This limitation is overcome by distorting the two-dimensional image so as to adjust the image's vanishing point(s) in accordance with the movement of the user using a pyramidic panel structure. In this manner, as the user moves away from the ideal viewing point, the distortions act to limit the discontinuities between the two-dimensional image and its surroundings. To minimize the depth profile of the pyramidic panel structure, the structure may be segmented into sections and each section translated towards, or away from, the user's viewpoint.
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公开(公告)号：GB2340329A
公开(公告)日：2000-02-16
申请号：GB9913319
申请日：1999-06-08
Applicant: LUCENT TECHNOLOGIES INC
Inventor： CARRARO GIANPAOLO U , EDMARK JOHN T , ENSOR JAMES ROBERT
Abstract: A limitation of a three-dimensional world in which objects in the distance may be represented in only two dimensions as a video on a screen occurs when a computer graphic object represented by computer graphics, e.g., in front of, to the side, above, or below the video screen, undergoes a trajectory that takes it to a location in the world that is not represented as computer graphics, but instead is within the field represented by the video, because such an object would disappear from view by the viewer. This limitation is overcome by having by determining when a computer graphic object undergoes a trajectory that takes it to a location in the world that is not represented as computer graphics, but instead is within the field represented by the video, and representing such an object as computer graphics in front of the screen to which at least one perspective transformation is applied, the perspective transformation being at least a function of the position at which the object is actually located.
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公开(公告)号：CA2270734A1
公开(公告)日：1999-12-16
申请号：CA2270734
申请日：1999-04-29
Applicant: LUCENT TECHNOLOGIES INC
Inventor： ENSOR JAMES ROBERT , EDMARK JOHN T , CARRARO GIANPAOLO U
Abstract: A limitation of a three-dimensional world in which objects in the distance may be represented in only two dimensions as a video on a screen occurs when a computer graphic object represented by computer graphics, e.g., in front of, to the side, above, or below the video screen, undergoes a trajectory that takes it to a location in the world that is not represented as computer graphics, but instead is within the field represented by the video, because such an object would disappear from view by the viewer. This limitation is overcome by having by determining when a computer graphic object undergoes a trajectory that takes it to a location in the world that is not represented as computer graphics, but instead is within the field represented by the video, and representing such an object as computer graphics in front of the screen to which at least one perspective transformation is applied, the perspective transformation being at least a function of the position at which the object is actually located.
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