Patent US6044168A successfully refreshed from Google Patents.
US6044168A
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Model based faced coding and decoding using feature detection and eigenface coding
Assignee: Texas Instruments Inc
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Filing: 1997-11-14
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Granted: 2000-03-28
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Expires: 2017-11-14
Abstract
Abstract The method uses a three-dimensional face model and a technique called eigenface decomposition to analyze the video at one end. The facial feature locations and eigenface coding of the face image are sent to a decoder. The decoder synthesizes the face image at the receiving end. Eigenface decoding is used to texture map a three-dimensional model warped by detected feature locations.
Inventors
- 👤 Mihran Tuceryan
- 👤 Bruce E. Flinchbaugh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:36
CPC Classifications
G; G06; G06T; G06T9/00; G06T9/001; G06V; G06V40/00; G06V40/10; G06V40/16
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
211 words
A method of sending a facial image comprising the steps of: using a set of multiscale templates locating a point on said facial image with the highest correlation coefficient at the best scale as the location of the face; detecting facial features by template matching facial features to provide a set of points defining said facial feature locations; encoding said facial image into eigenface parameters including the steps of providing a training database of eigenfaces and performing eigenface decomposition of an input image by finding eigenvectors and eigenvalues of points in free space represented by a training set of images; transmitting and receiving said eigenvalues and said set of points defining said facial feature locations; providing at a receiver a three-dimensional generic model of a face; warping said generic face model using said set of points defining said facial feature locations; said warping step includes using an affine transform for a portion of said face and bilinear transform to warp a different portion of said face; decoding said facial image from eigenvalues to reconstruct the face image to define a texture image; said decoding including the step of providing said training database of eigenfaces; and mapping said texture image onto said warped three-dimensional face model to provide a synthesized facial image.
Claim 2
Independent Claim
211 words
A method of sending a facial image comprising the steps of: using a set of multiscale templates locating a point on said facial image with the highest correlation coefficient at the best scale as the location of the face; detecting facial features by template matching facial features to provide a set of points defining said facial feature locations; encoding said facial image into eigenface parameters including the steps of providing a training database of eigenfaces and performing eigenface decomposition of an input image by finding eigenvectors and eigenvalues of points in free space represented by a training set of images; transmitting and receiving said eigenvalues and said set of points defining said facial feature locations; providing at a receiver a three-dimensional generic model of a face; warping said generic face model using said set of points defining said facial feature locations; said warping step includes using an affine transform for a portion of said face and bilinear transform to warp a different portion of said face; decoding said facial image from eigenvalues to reconstruct the face image to define a texture image; said decoding including the step of providing said training database of eigenfaces; and mapping said texture image onto said warped three-dimensional face model to provide a synthesized facial image.
Claim 3
Dependent Claim
15 words
The method of claim 1 wherein said facial features include a corner of an eye.
Claim 4
Dependent Claim
15 words
The method of claim 2 wherein said facial features include a corner of a mouth.
Claim 5
Dependent Claim
14 words
The method of claim 3 wherein said facial features include a tip of nose.
Claim 6
Dependent Claim
14 words
The method of claim 4 wherein said facial features includes sides of said nose.
Claim 7
Dependent Claim
13 words
The method of claim 5 wherein said facial features includes a facial outline.
Claim 8
Dependent Claim
14 words
The method of claim 1 wherein said facial features include corner of a mouth.
Claim 9
Dependent Claim
13 words
The method of claim 1 wherein said facial features include tip of nose.
Claim 10
Dependent Claim
14 words
The method of claim 8 wherein said facial features includes sides of said nose.
Claim 11
Dependent Claim
12 words
The method of claim 1 wherein said facial features includes facial outline.
Claim 12
Dependent Claim
20 words
The method of claim 1 wherein said method of defining said feature location includes matching feature templates of an eye.
Claim 13
Dependent Claim
20 words
The method of claim 1 wherein said method of defining said feature location includes matching feature templates of a mouth.
Claim 14
Dependent Claim
20 words
The method of claim 1 wherein said method of defining said feature location includes matching feature templates of a nose.
Claim 15
Dependent Claim
21 words
The method of claim 1 wherein said method of defining said feature location includes matching feature templates of a facial outline.
Claim 16
Dependent Claim
28 words
The method of claim 1 wherein said method of defining said feature location includes matching feature templates of a facial outline, an eye, a nose and a mouth.
Claim 17
Dependent Claim
33 words
The method of claim 1, wherein said affine transform is used in the upper and lower portions of said face and said bilinear transform is used in the middle part of said face.
References Cited (Backward Citations)
US5719951A
Cited
US5432864A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-03-28 | 2003-09-27 | 2004-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-03-28 | 2007-09-27 | 2008-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-03-28 | 2011-09-27 | 2012-03-28 | $7700.00 | Window Closed / Lapsed |