Juliet Christopher

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We present an improved anatomically based approach to modeling the human hand for use in the animation of American Sign Language. The joint rotations in the model are based on the bone and muscle configurations of the hand, and a forward kinematic solution is used to position the hand. In particular, we investigate the rotations of the base joint of the(More)
American Sign Language (ASL) is the primary language used by the North American Deaf Community. We present our method for producing natural animations of fingerspelling, a functionally important subset of ASL. User testing demonstrates that our animations are readily identified by members of the deaf community.
A system to interactively create and modify/edit American Sign Language signs is described. The system is grounded on the use of three-dimensional computer graphics to construct the signs. Usability tests have been conducted to obtain early feedback on the user experience with the system. The final goal is to build a personal digital translator for the(More)
Many problems in computer graphics concern the precise positioning of a human figure, and in particular, the positioning of the joints in the upper body as a virtual character performs some action. We explore a new technique for precisely positioning the joints in the arms of a human figure to achieve a desired posture. We focus on an analytic solution for(More)
Usability tests have been conducted to obtain early feedback on animated computer graphics being developed to present translations of English into American Sign Language (ASL). These animations are part of development of a personal digital translator for the deaf. Since ASL is a visual language, it is particularly important that the animations be visually(More)
American Sign Language (ASL) is the natural and living language of the Deaf Community in North America. In addition to hand gestures, facial expressions are a key component of communicating in ASL. We present a method for reproducing facial expressions through computer graphic animation. Directions for further research are suggested.
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