Lumipen 2: Robust Tracking for Dynamic Projection Mapping
Projection Mapping has recently generated much attention, and can be applied to areas such as performance art and human-computer interfaces. Projection Mapping typically targets static or semi-static objects, and few systems can deal with dynamic objects due to a large delay from measurement to projection. The delay results in significant misalignment in the case of dynamic objects, and leads to discomfort.
In our laboratory, the Lumipen system (URL: • Lumipen: Projection Mapping on a Movi... ) has been proposed to solve the time-geometric inconsistency caused by the delay when using dynamic objects. It consists of a projector and a high-speed optical axis controller with high-speed vision and mirrors, called Saccade Mirror (1ms Auto Pan-Tilt technology, URL: • 1ms Auto Pan-Tilt for perfect recente... ). Lumipen can provide projected images that are fixed on dynamic objects such as bouncing balls. However, the robustness of the tracking is sensitive to the simultaneous projection on the object, as well as the environmental lighting.
In order to achieve robust Dynamic Projection Mapping, we introduce a retroreflective background to the Lumipen system (Lumipen 2, URL: http://ishikawa-vision.org/mvf/Lumipe.... As a result, the object will appear darker than the background during projection, which is observed using a high-speed camera. The tracking will therefore be robust to changes of the content of the projection such as movies, and changes of environmental lighting in the object's vicinity associated with its motion. The tracking technique enables Dynamic Projection Mapping with partially well-lit content and time-geometric consistency. This opens up for new applications of Projection Mapping, such as visualizing a pitched ball as a fire ball.
[Link]
Ishikawa Watanabe Laboratory: http://ishikawa-vision.org/
Oku Laboratory: http://www.okulab.cs.gunma-u.ac.jp/
Lumipen 2 Project: http://ishikawa-vision.org/mvf/Lumipe...
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