Camera information coding/decoding method for synthesizing stereoscopic real video and a computer graphic image
First Claim
1. A camera information coding method for synthesizing a stereoscopic real video and a computer graphic image, the method comprising the steps of:
- detecting and inputting a camera information on a corresponding frame of an image being pictured at present;
calculating each component difference between the camera information on an inputted present (t) frame and a camera information on a just previous (t−
1) frame to acquire a camera displacement information between the frames;
coding the camera displacement information between the frames to compress and store pictured image contents and the coded camera information; and
updating the coded camera information on the corresponding frame as the camera information on the previous frame.
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Accused Products
Abstract
A camera information coding/decoding method for synthesizing stereoscopic real video and a computer graphic image is disclosed. The method stores the camera information generated when picturing, which is not contained in the existing multimedia contents coding standard, that is, the location motion information of the camera and the camera viewpoint displacement information, together with contents as the camera motion information stream. The camera information obtained through the camera position sensor and the camera viewpoint displacement sensor when picturing image is coded and stored together with the contents, thereby easily and precisely synthesizing with the computer graphic image. In addition, since the information may be easily transformed to the descriptor of the camera motion information of MPEG-7 format, there is another advantage of easily carrying out camera motion information indexing operation among searching methods of the multimedia contents.
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Citations
22 Claims
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1. A camera information coding method for synthesizing a stereoscopic real video and a computer graphic image, the method comprising the steps of:
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detecting and inputting a camera information on a corresponding frame of an image being pictured at present; calculating each component difference between the camera information on an inputted present (t) frame and a camera information on a just previous (t−
1) frame to acquire a camera displacement information between the frames;coding the camera displacement information between the frames to compress and store pictured image contents and the coded camera information; and updating the coded camera information on the corresponding frame as the camera information on the previous frame. - View Dependent Claims (2, 3, 4, 5)
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6. A camera information decoding method for synthesizing a stereoscopic real video and a computer graphic image, the method comprising the steps of:
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if a coded camera information of a current frame at a camera information stream is inputted, decoding the inputted camera to acquire a camera displacement information between the frames; adding the camera displacement information and a camera information of a previous frame to calculate a location vector, viewpoint vector, and upward vector information of the camera of the current frame; updating the calculated location vector, viewpoint vector, and upward vector information of the camera of the current frame as the camera information on the previous frame; and synthesizing the stereoscopic real video and the computer graphic image by use of the location vector, viewpoint vector, and upward vector information of the camera of the current frame. - View Dependent Claims (7, 8, 9, 10, 11)
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12. A recording medium for executing a camera information coding method for synthesizing a stereoscopic real video and a computer graphic image, the recoding medium capable of being read by a digital processor, and storing a program of commands executed by the digital processor, the program being implemented by types, with the program comprising the steps of:
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detecting and inputting a camera information on a corresponding frame of an image being pictured at present; calculating each component difference between the camera information on an inputted present (t) frame and a camera information on a just previous (t−
1) frame to acquire a camera displacement information between the frames;coding the camera displacement information between the frames to compress and store pictured image contents and the coded camera information; and updating the coded camera information on the corresponding frame as the camera information on the previous frame. - View Dependent Claims (14, 15, 16, 17)
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13. A recording medium for executing a camera information decoding method for synthesizing a stereoscopic real video and a computer graphic image, the recoding medium capable of being read by a digital processor, and storing a program of commands executed by the digital processor, the program being implemented by types, with the program comprising the steps of:
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if a coded camera information of a current frame at a camera information stream is inputted, decoding the inputted camera to acquire a camera displacement information between the frames; adding the camera displacement information and a camera information of a previous frame to calculate a location vector, viewpoint vector, and upward vector information of the camera of the current frame; updating the calculated location vector, viewpoint vector, and upward vector information of the camera of the current frame as the camera information on the previous frame; and synthesizing the stereoscopic real video and the computer graphic image by use of the location vector, viewpoint vector, and upward vector information of the camera of the current frame. - View Dependent Claims (18, 19, 20, 21, 22)
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Specification