一种手持可遮挡的增强现实彩色标志

Hand-hold AR color marker robust to occlusion

基于标志的跟踪注册技术是当前增强现实系统中最成熟和最接近实际应用的注册技术。该注册技术是将一些已知空间相对位置的人工标志放置在需要注册的真实场景中,利用摄像机跟踪识别标志。以手部康复训练为背景,提出了一种特殊的近景手持彩色标志及其识别方法。标志采用海明码编码技术编/解码,不仅扩充了标志的编码量,还能够利用海明码的奇偶校验方法解决由于手部无意遮挡引起的跟踪注册失败问题。实验结果表明,该彩色标志在多种环境下都能够实现稳定注册,具有一定的鲁棒性。为验证彩色标志的实用性,提出一个基于手部运动的增强现实桌面击球游戏,拥有较好的注册效果。彩色标志的提出将有助于增强现实手部康复训练项目的研究。

As the most mature and practical registration technology of existing augmented reality system, marker-based trac- king registration technology puts artificial markers from relative position of known space to the real scenes to be registered and then tracks the markers with cameras. With the background of hand rehabilitation training, this paper presented a kind of spe- cial close range handheld colorful marker and the identifying methods. The marker adopted the Hamming code technologies to encode and decode. Not only this would expand the amount of the marker, but also offered a solution with odd-even check methods of Hamming code to track registration failure resulting from unintentional occlusion by hand. According to the experi- ment, it could achieve stable registration with the colorful marker under even complicated environment, with robustness to some extent. To verify the practicability of the colorful marker, this paper presented a hand-movement-based augmented reality desk ball-striking game, achieving satislying registration effect. The colorful marker will be beneficial to the research on aug- mented reality hand rehabilitation training program.