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Image Analysis

Method-and-apparatus-for-providing-real-time-animation-utilizing-a-database-of-postures

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Details

Inventors: LaChapelle, Pierre;
Assignee: Taarna Studios Inc. (Montreal, CA)
Primary Examiner: Vo; Cliff N.
Assistant Examiner:
Attorney, Agent or Firm: Ratner & Prestia

A method and apparatus for animating a synthetic body part. The 3D-animation system and method use a database of basic postures. In a first step, for each frame, a linear combination of the basic postures from a database of basic postures is obtained by minimizing the Euclidean distance between the displacement of critical points. The displacement information is supplied externally, and typically can be obtained by observing the displacement of physical markers placed on a moving physical body part in the real world. For instance, the synthetic body part may be an expression of a human face and the displacement data are obtained by observing physical markers placed on the face of an actor. The linear combination of the postures in the database of postures is then used to construct the desired posture. Postures are constructed for each time frame and are then displayed consecutively to provide animation. A computer readable storage medium containing a program element to direct a processor of a computer to implement the animation process is also provided.

DETAILED DESCRIPTION What is claimed is: 1.
A computer readable storage medium containing a program element for directing a computer to generate data providing a graphical representation of a synthetic body part in a desired posture, said program element implementing functional blocks comprising: a first input unit for receiving source data that is representative of the synthetic body part in the desired posture; a second input unit for receiving basic posture data from a database containing data elements, the data elements being representative of the body part in different postures; and a processing unit for processing said source data and said basic posture data to generate the data providing a graphical representation of the synthetic body part in the desired posture.
2.
A computer readable storage medium as defined in claim 1, wherein said processing unit is capable of combining a plurality of data elements with the source data to generate the data providing a graphical representation of the synthetic body part in the desired posture.
3.
A computer readable storage medium as defined in claim 2, wherein said processing unit includes means for computing from said source data a displacement vector that is indicative of the displacement in a certain coordinate space of points relative to a reference to provide a representation of the synthetic body part in the desired posture, said processing unit utilizing said displacement vector for combining the plurality of data elements to generate the data providing a graphical representation of the synthetic body part in the desired posture.
4.
A computer readable storage medium as defined in claim 3, wherein said processing unit computes from said displacement vector a weights vector indicative of the contribution of each data element in the database in a combination of the data elements to generate the data providing the graphical representation of the synthetic body part in the desired posture.
5.
A computer readable storage medium as defined in claim 4, wherein said processing unit effects a linear combination of the data elements in the database to generate the data providing a graphical representation of the synthetic body part in the desired posture

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