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Acquisition of Off-Screen Object by Predictive Jumping

Kazuki Takashima, Sriram Subramanian, Takayuki Tsukitani, Yoshifumi Kitamura, Fumio Kishno, Acquisition of Off-Screen Object by Predictive Jumping. Lecture Notes in Computer Science - Computer-Human Interaction. ISBN 978-3-540-70584-0, pp. 301–310. July 2008. No electronic version available.


We propose predictive jumping (PJ), a fast and efficient algorithm that enables user navigation to off-screen targets. The algorithm is inspired by Delphian Desktop [1] and the off-screen visualization techniquea??Halo [2]. The Halos represented at the edge of the viewport help users estimate off-screen target distance and encourage them to make a single fluid mouse movement toward the target. Halfway through the usera??s motion, the system predicts the usera??s intended target and quickly moves the cursor towards that predicted off-screen location. In a pilot study we examine the usera??s ability to select off-screen targets with predictive models based on usera??s pointing kinematics for off-screen pointing with Halo. We establish a linear relationship between peak velocity and target distance for PJ. We then conducted a controlled experiment to evaluate PJ against other Halo-based techniques, Hop [8] and Pan with Halo. The results of the study highlight the effectiveness of PJ.

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