D. Terzopoulos, A. Witkin, and M. Kass. Energy constraints on deformable models: recovering shape and non-rigid motion. In Proc. of AAAI 87, Seattle, 1987.  Home/Search   Document Not in Database   Summary   Related Articles   Check

.... In graphics physically based models have been proposed for deformable parts [56, 57] A survey of deformable modeling in computer graphics can be found in [22] The use of physical simulation and related optimization techniques as a means of geometric interaction has been applied to animation [58], drawing [59] free form surface and volume modeling [15] mechanical design [65] and interactive molecular simulation [55] For a discussion on the dynamic simulation of nonpenetrating flexible bodies see [6] Models and algorithms appropriate for the collision of deformable bodies are ....

D. Terzopoulos, A. Witkin, and M. Kass. Energy constraints on deformable models: recovering shape and non-rigid motion. In Proc. of AAAI 87, Seattle, 1987.

....models may also be appropriate and this issue is currently under investigation. In graphics physically based models have been proposed for deformable parts [19, 20] The use of physical simulation and related optimization techniques as a means of geometric interaction has been applied to animation [21], free form surface and volume modeling [4] and mechanical design [23] For a discussion on the dynamic simulation of non penetrating flexible bodies see [1] 3 f PRM: General Description f PRM repeats a basic step until a query is answered or until an predefined amount of time has elapsed. The ....

D. Terzopoulos, A. Witkin, and M. Kass. Energy constraints on deformable models: recovering shape and non-rigid motion. In Proc. of AAAI 87, Seattle, 1987.

....even if they lead to a higher individual point to point similarity, on the other. One of the first elastic registration methods was the rubber mask technique [11] A more advanced approach was introduced in [3] where the basic elements of modern methods are already present. More recently, in [10], a number of refinements are proposed. The three phases which compose an elastic local registration method are: # Selection of the landmark or control points which will be used to command the deformation process. In our case, this selection can be performed in the pre inspection stage, using ....

D. Terzopoulos, A. Witkin & M. Kass, "Energy Constraints on Deformable Models: Recovering Shape and Non-Rigid Motion" Proceedings of AAAI 87 Vol. 2. Menlo Park, CA. Pp 755-760, 1987

.... In graphics physically based models have been proposed for deformable parts [50, 51] A survey of deformable modeling in computer graphics can be found in [16] The use of physical simulation and related optimization techniques as a means of geometric interaction has been applied to animation [52], drawing [53] free form surface and volume modeling [9] mechanical design [57] and interactive molecular simulation [48] For a discussion on the dynamic simulation of nonpenetrating flexible bodies see [4] Models and algorithms appropriate for the collision of deformable bodies are ....

D. Terzopoulos, A. Witkin, and M. Kass. Energy constraints on deformable models: recovering shape and non-rigid motion. In Proc. of AAAI 87, Seattle, 1987.

....models may also be appropriate and this issue is currently under investigation. In graphics physically based models have been proposed for deformable parts [19, 20] The use of physical simulation and related optimization techniques as a means of geometric interaction has been applied to animation [21], free form surface and volume modeling [4] and mechanical design [23] For a discussion on the dynamic simulation of non penetrating flexible bodies see [1] 3 f PRM: General Description f PRM repeats a basic step until a query is answered or until an predefined amount of time has elapsed. The ....

D. Terzopoulos, A. Witkin, and M. Kass. Energy constraints on deformable models: recovering shape and non-rigid motion. In Proc. of AAAI 87, Seattle, 1987.

....discussed so far is that the elastic model is applied to an object as opposed to the image grid. Hence, some sort of segmentation must proceed the analysis and the outcome is no longer a deformation to register images but parameters to match images to object models. One example can be found in [Terzopoulos 87] They proposed a system of energy constraints for elastic deformation for shape and motion recovery which was applied to a temporal sequence of stereo images of a moving finger. The external forces of the deformable model are similar to those used in elastic registration; they constrain the ....

.... [Mohr 90] Syntactic features: grammars composed from patterns [Bunke 90] Semantic networks: scene regions and their relations [Faugeras 81] MATCHING AGAINST MODELS accurate intrinsic structure, noise in one image only Anatomic atlas [Dann 89] Geographic map [Maitre 87] Object model [Terzopoulos 87] Table 3: Feature Spaces used in Image Registration 40 ture spaces include: edges, contours, surfaces, other salient features such as corners, line intersections, and points of high curvature, statistical features such as moment invariants or centroids, and higher level structural and ....

D. Terzopoulos, A. Witkin, and M. Kass, "Energy Constraints on Deformable Models: Recovering Shape and Non-Rigid Motion, " Proceedings, AAAI 87 2, July 1987, pp755-760.

....estimator makes the state correction at each frame that minimizes the residual error between the image and the transformed, windowed hand templates. Since the template positions in the image are constrained directly by the state model, this is an example of a direct minimization (or energy based [14, 28, 23]) approach to tracking. It stands in contrast to approaches, like our earlier DigitEyes formulation, in which residual computation follows a separate feature extraction stage. By enforcing the kinematic constraints at the earliest stage of image analysis, we gain robustness to both noise and the ....

....image plane, we can formulate tracking as a direct optimization problem over an image based residual error. This approach of coupling the image interpretation (feature detection) problem directly to the model was popularized by SNAKES [14] and has since been applied to a variety of other domains [28]. 8 Conclusion We are developing a visual sensor for human spatial motion. Such a sensor could be located in the user s environment (rather than on their person) and could operate under natural conditions of lighting and dress, providing a degree of convenience and flexibility that is currently ....

D. Terzopoulos, A. Witkin, and M. Kass. Energy constraints on deformable models: Recovering shape and non-rigid motion. In Proc. of AAAI-87, pages 755--760, 1987.

....optimization techniques as a means of geometric interaction, allowing users to directly manipulate simulated objects subject to constraints. This approach has been applied to animation, image analysis, drawing, free form surface modeling, mechanical design, and interactive molecular simulation [29, 28, 30, 5, 31, 33, 27]. Despite its successes, this approach has been subject to the severe limitation that it only supports manipulation of systems gov Author s affiliations: Mikako Harada, mh3i andrew.cmu.edu) Department of Architecture; Andrew Witkin, aw cs.cmu.edu) Department of Computer Science; David ....

....forces imposed by the user. The use of constrained dynamics simulations for interactive geometric modeling was described by Witkin et al. 32] Flexiblesurface simulations for interactive computer vision and free form surface modeling are areas that have also been extensively investigated [29, 28, 30, 5, 31, 33]. Constrained dynamics simulations have also been used to support drawing applications [11] and for interactive camera control for animation [10] Surles [27] describes 1 Shape grammars in their original form could not be implemented directly, due to problems of ambiguity. Several additional ....

Demetri Terzopoulos, Andrew Witkin, and Michael Kass. Energy constraints on deformable models: recovering shape and non-rigid motion. In Proc. AAAI-87, Seattle, 1987.

Online articles have much greater impact   More about CiteSeer.IST   Add search form to your site   Submit documents   Feedback  

CiteSeer.IST - Copyright Penn State and NEC