Abstract: A visual tracking and mapping system builds panoramic images in a handheld device equipped with optical sensor, orientation sensors, and visual display. The system includes an image acquirer for obtaining image data from the optical sensor of the device, an orientation detector for interpreting the data captured by the orientation sensors of the device, an orientation tracker for tracking the orientation of the device, and a display arranged to display image data generated by said tracker to a user.

Abstract: A system and a method is provided for improving a baseball player's batting swing. Preferably, the system can be utilized to teach a player to swing with power and with a slight upstroke to increase the chances of getting a powerful line drive hit. The system includes a post upwardly extending from a support base. Preferably, the post is adjustable to increase or decreased in height to match the size of the player utilizing the system. A channel is attached at upper portion of the post and includes a means for providing resistance, such as bristles, that protrude generally upwardly from the channel base. A second similar channel with a resistance means is mounted above and facing the first channel such that there is a gap between the two resistance means.