A research group led by Professor Kosuke Sato of the Graduate School of Basic Engineering, Osaka University has succeeded in developing a completely new automatic alignment technology for laser projectors.This eliminates the need for projection of special patterns and camera measurement, which have been conventionally required for projection mapping.

In projection mapping, the image must be projected onto a non-planar object, a moving object, or a person.Therefore, it is difficult to manually align the image, and research on a technique for automatically aligning the projected image on such an object surface is being promoted worldwide.

 This time, the research group embedded an optical sensor in the target surface and obtained the position of the projector pixel illuminating the sensor from the light reception timing when projecting video content.As a result, the projection image was successfully aligned with the target surface.Furthermore, it was clarified by experiments that various technical restrictions in the conventional alignment technique can be solved.

 An optical sensor is also installed on the projector side.By sequentially measuring the reflected light of the projected content from the target surface, it was possible to obtain the positional correspondence between the projector pixels and the pattern on the target surface.This corresponds to a pseudo reproduction of a camera that shoots from the viewpoint of a projector.Using this technology, it was clarified that alignment based on camera measurement using a conventional image marker (two-dimensional print pattern such as a QR code) can be performed without a camera.

 With the results of this research, it is expected that in the future advanced IoT society, it will be possible to provide various services that are more closely related to daily life by projection mapping without the need for an additional measurement system using a camera. ..

 This achievement will be adopted by ISMAR (International Symposium on Mixed and Augmented Reality), a major international conference on augmented reality and AR to be held in France from October 10 to 9, and will be presented orally on October 13. schedule.

Conference announcement information:[International Symposium on Mixed and Augmented Reality]Simultaneous Projection and Positioning of Laser Projector Pixels

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