Lazy Dragging: Effortless bounding-box drawing for touch-screen devices

Dragging rectangular boxes with a finger is among the most intuitive and popular operation to select a whole object. This work proposes a convenient method of bounding-box drawing for touch-screen devices, called Lazy Dragging. To achieve real-time and accurate performance, it first filters out explicit non-borders via graph-based segmentation. It then singles out the best four box sides among the remaining candidates using edge feature-based Random Forest. Experiments on a real-world dataset demonstrate that Lazy Dragging convincingly enhances the quality of bounding-box inputs, enabling easy object selection on small touch-screen devices.