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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Xiaoming Liu Ting Yu Sebastian, T. Tu, P. |
| Copyright Year | 2008 |
| Description | Author affiliation: Visualization & Comput. Vision Lab., GE Global Res., Niskayuna, NY (Xiaoming Liu; Ting Yu; Sebastian, T.; Tu, P.) |
| Abstract | This paper studies image alignment, the problem of learning a shape and appearance model from labeled data and efficiently fitting the model to a non-rigid object with large variations. Given a set of images with manually labeled landmarks, our model representation consists of a shape component represented by a point distribution model and an appearance component represented by a collection of local features, trained discriminatively as a two-class classifier using boosting. Images with ground truth landmarks are the positive training samples while those with perturbed landmarks are considered as negatives. Enabled by piece-wise affine warping, corresponding local feature positions across all training samples form a hypothesis space for boosting. Image alignment is performed by maximizing the boosted classifier score, which is our distance measure, through iteratively mapping the feature positions to the image, and computing the gradient direction of the score with respect to the shape parameter. We apply this approach to human body alignment from surveillance-type images. We conduct experiments on the MIT pedestrian database where the body size is approximately 110 times 46 pixels, and demonstrate our real-time alignment capability. |
| Starting Page | 1 |
| Ending Page | 8 |
| File Size | 1626920 |
| Page Count | 8 |
| File Format | |
| ISBN | 9781424422425 |
| ISSN | 10636919 |
| DOI | 10.1109/CVPR.2008.4587563 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2008-06-23 |
| Publisher Place | USA |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Deformable models Humans Biological system modeling Boosting Shape measurement Active appearance model Magnesium compounds Active shape model Image resolution Performance evaluation |
| Content Type | Text |
| Resource Type | Article |
| Subject | Computer Vision and Pattern Recognition Software |
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