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Rapid computer modeling of faces for animation
| Details |
Inventors: Liu, Zicheng; Zhang, Zhengyou; Cohen, Michael F.; Jacobs, Charles E.;
Assignee: Microsoft Corporation (Redmond, WA)
Primary Examiner: Boudreau; Leo
Assistant Examiner: Sherali; Ishrat
Attorney, Agent or Firm: Lee & Hayes, PLLC
Described herein is a technique for creating a 3D face model using images obtained from an inexpensive camera associated with a general-purpose computer. Two still images of the user are captured, and two video sequences. The user is asked to identify five facial features, which are used to calculate a mask and to perform fitting operations. Based on a comparison of the still images, deformation vectors are applied to a neutral face model to create the 3D model. The video sequences are used to create a texture map. The process of creating the texture map references the previously obtained 3D model to determine poses of the sequential video images. |
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DETAILED DESCRIPTION The following description sets forth a specific embodiment of a 3D modeling system that incorporates elements recited in the appended claims.
The embodiment is described with specificity in order to meet statutory requirements.
However, the description itself is not intended to limit the scope of this patent.
Rather, the claimed invention might eventually be embodied in other ways, to include different elements or combinations of elements similar to the ones described in this document, in conjunction with other present or future technologies.
System Overview FIG.
1 shows components of our system.
The equipment includes a computer 10 and a video camera 12.
The computer is a typical desktop, laptop, or similar computer having various typical components such as a keyboard/mouse, display, processor, peripherals, and computer-readable media on which an operating system and application programs are stored and from which the operating system and application programs are executed.
Such computer-readable media might include removable storage media, such as floppy disks, CDROMs, tape storage media, etc.
The application programs in this example include a graphics program designed to perform the various techniques and actions described below.
The video camera is an inexpensive model such as many that are widely available for Internet videoconferencing.
We assume the intrinsic camera parameters have been calibrated, a reasonable assumption given the simplicity of calibration procedures [36].
Data Capture The first stage is data capture.
The user takes two images with a small relative head motion, and two video sequences: one with the head turning to each side.
Alternatively, the user can simply turn his/her head from left all the way to the right, or vice versa.
In that case, the user needs to select one approximately frontal view while the system automatically selects the second image and divides the video into two sequences.
In the seque, we call the two images the base images
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Image Analysis 
