Publications
論文誌 (国際) Target-Aware Double-Tap-to-Zoom Technique for Mobile Devices
Kaori Ikematsu, Kunihiro Kato (Tokyo University of Technology)
International Journal of Human–Computer Interaction (IJHCI)
2025.8.1
Double-tap-to-zoom is a common gesture on mobile devices, but often applies a fixed scale factor, requiring users to manually adjust zoom levels via pinch gestures to achieve comfortable readability. This limitation is particularly critical for text content, especially for users with diverse visual needs. We propose a target-aware zooming technique that dynamically adjusts the scale factor based on content and user preferences, positioning the tapped text at a preferred screen location. A crowdsourced study (N = 269) identified design requirements, followed by quantitative (N = 12) and qualitative (N = 16) user studies demonstrating improved readability and reductions in task time, manual adjustments, and physical workload. Based on the results of these studies, we incorporated a context-aware feature that adjusts text size according to factors such as vision correction. This technique enhances usability without introducing new interaction methods, enabling more efficient navigation and improved reading experiences across diverse user needs and content formats.
Paper :
Target-Aware Double-Tap-to-Zoom Technique for Mobile Devices
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