Issues in the implementation of haptic compression

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The growth of the Internet can be attributed to the ability to compress information such as pictures (jpg), videos (mpg) and music (mp3). There is growing research into adding the sense of touch, or haptics, into computer applications. Haptics is created by mechatronic devices that exert forces on the human user, with the goal of increasing realism in immersive environments for applications as varied as computer games and medical training. Haptic models that are currently used are quite complicated. A complex object is usually broken down into a sufficient number of smaller elements such as triangular polygons. Touch is added by giving each of these polygons a haptic effect. Thus, a vast amount of data needs to be stored. As well, detecting which polygons are in contact with the human user is extremely computationally intensive. Two approaches have been studied by the research team to compress haptic data and the goal of this proposal is to further expand on these studies: 1. It is well known that the ability to sense touch, much like vision and sound, is greatly impacted by human perception. We propose to continue to study the influence of speed, force and other factors in haptics as it relates to the level of detail that can be perceived by the human user, so that imperceptible haptic details can be removed. This will involve human testing with haptic devices. 2. The current practice of creating complex virtual objects using simple polygons is inefficient. We propose the use of analytical solutions that, although complex, describe larger areas of the surface, creating a much more efficient methodology for haptic interactions. In this proposal, this work will be extended to include objects with both stiff and deformable surfaces. We propose the use of analytical solutions that, although complex, describe larger areas of the surface, creating a much more efficient methodology for haptic interactions. In this proposal, this work will be extended to include objects with both stiff and deformable surfaces.