Reza Parang

This paper presents a geospatial collision detection technique consisting of two methods: Find Object Distance (FOD) and Find Reflection Angle (FRA). We show how the geospatial collision detection technique using a computer vision system detects a computer generated virtual object and a real object manipulated by a human user and how the virtual object can be reflected on a real floor after being detected by a real object. In the geospatial collision detection technique, the FOD method detects… Show more

This paper presents a geospatial collision detection technique consisting of two methods: Find Object Distance (FOD) and Find Reflection Angle (FRA). We show how the geospatial collision detection technique using a computer vision system detects a computer generated virtual object and a real object manipulated by a human user and how the virtual object can be reflected on a real floor after being detected by a real object. In the geospatial collision detection technique, the FOD method detects the real and virtual objects, and the FRA method predicts the next moving directions of virtual objects. We demonstrate the two methods by implementing a floor based Augmented Reality (AR) game, Ting Ting, which is played by bouncing fire-shaped virtual objects projected on a floor using bamboo-shaped real objects. The results reveal that the FOD and the FRA methods of the geospatial collision detection technique enable the smooth interaction between a real object manipulated by a human user and a virtual object controlled by a computer. The proposed technique is expected to be used in various AR applications as a low cost interactive collision detection engine such as in educational materials, interactive contents including games, and entertainment equipments. Show less

As computer-based multimedia content for educational and industrial venues is being further developed, a new input device is needed to interact with objects for application in these areas. This paper introduces the Laser Shot System that uses a convention laser pointer as a pointing device, allowing many degrees of freedom when selecting objects displayed on a large screen that is located a far distance from the user. The main purpose of the device is to enable the user to interact with… Show more

As computer-based multimedia content for educational and industrial venues is being further developed, a new input device is needed to interact with objects for application in these areas. This paper introduces the Laser Shot System that uses a convention laser pointer as a pointing device, allowing many degrees of freedom when selecting objects displayed on a large screen that is located a far distance from the user. The main purpose of the device is to enable the user to interact with multimedia content in a spacious area; whereas, selecting objects on a screen located a substantial distance from the user is difficult with current general input methods such as a keyboard and mouse, even with radio frequency enabled widgets. To demonstrate the efficacy of the laser shot system, a virtual aquarium was projected on a large-scale screen by a beam projector to produce an effect similar to a science hall. Preliminary evidence obtained showed that the task of selecting specific objects on the screen and obtaining desired information when the user is located a far distance from the screen using the Laser Shot System was simple. It is expected that the results from this study could contribute to the design of input methods for large screen-based interactive learning technologies for educational setting. Show less