Facial image processing methods and systems
First Claim
Patent Images
1. A computer-implemented facial image processing method comprising:
- illuminating a subject'"'"'s head with one or more light sources that are selected to suppress specular reflection;
capturing digital images from a plurality of positions wound the subject'"'"'s head while the subject'"'"'s head is illuminated, each of the digital images representing the subject'"'"'s head at an angle from which the digital image is captured at one of the plurality of positions;
computing a surface normal to form a three-dimensional surface for each of the digital images;
computing an albedo map based on the computed three-dimensional surface for each of the digital images, the albedo map each providing a reflectance for each point of the three-dimensional surface that represents the subject'"'"'s head; and
combining two or more of the computed albedo maps for the digital images to provide a single albedo map for the subject'"'"'s head, the combining comprising at least combining two or more three-dimensional surfaces to form a complete three-dimensional surface and combining two or more albedo maps for the corresponding three-dimensional surfaces to form a complete albedo map for the complete three-dimensional surface of the subject'"'"'s head.
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Abstract
In the described embodiment, methods and systems for processing facial image data for use in animation are described. In one embodiment, a system is provided that illuminates a face with illumination that is sufficient to enable the simultaneous capture of both structure data, e.g. a range or depth map, and reflectance properties, e.g. the diffuse reflectance of a subject'"'"'s face. This captured information can then be used for various facial animation operations, among which are included expression recognition and expression transformation.
10 Citations
11 Claims
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1. A computer-implemented facial image processing method comprising:
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illuminating a subject'"'"'s head with one or more light sources that are selected to suppress specular reflection; capturing digital images from a plurality of positions wound the subject'"'"'s head while the subject'"'"'s head is illuminated, each of the digital images representing the subject'"'"'s head at an angle from which the digital image is captured at one of the plurality of positions; computing a surface normal to form a three-dimensional surface for each of the digital images; computing an albedo map based on the computed three-dimensional surface for each of the digital images, the albedo map each providing a reflectance for each point of the three-dimensional surface that represents the subject'"'"'s head; and combining two or more of the computed albedo maps for the digital images to provide a single albedo map for the subject'"'"'s head, the combining comprising at least combining two or more three-dimensional surfaces to form a complete three-dimensional surface and combining two or more albedo maps for the corresponding three-dimensional surfaces to form a complete albedo map for the complete three-dimensional surface of the subject'"'"'s head. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A facial image-processing system comprising:
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a camera; multiple light sources that produce light selected to suppress the specular reflection of a subject'"'"'s head that is viewed by the camera; and an image processor configured to; receive multiple digital images of a subject'"'"'s head that are produced by the camera, each of the multiple digital images representing the subject'"'"'s head at an angle from which the digital image is captured; compute a surface normal to form a three-dimensional surface for each of the digital images; compute an albedo map based on the computed three-dimensional surface for each image, the albedo map each providing a reflectance for each point of the three-dimensional surface that represents the subject'"'"'s head; combine albedo maps for all of the images to provide a single albedo map for the subject'"'"'s head, wherein to combine albedo maps for all of the images comprises to combine each of the computed three-dimensional surfaces to form a complete three-dimensional surface and to combine each of the computed albedo maps for the corresponding three-dimensional surface to form a complete albedo map for the complete three-dimensional surface of the subject'"'"'s head. - View Dependent Claims (10, 11)
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Specification