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Registration is one of the most difficult problems in augmented reality (AR) systems. In this paper, a simple registration method using natural features based on the projective reconstruction technique is proposed. This method consists of two steps: embedding and rendering. Embedding involves specifying four points to build the world coordinate system on(More)
In AR systems, registration is one of the most difficult problems currently limiting their application. In this paper, we propose a simple registration method using projective reconstruction. This method consists of two steps: embedding and tracking. Embedding involves specifying four points to build the world coordinate system on which a virtual object(More)
This paper presents a markerless registration approach for Augmented Reality (AR) systems based on the Kanade-Lucas-Tomasi (KLT) natural feature tracker and the affine reconstruction and reprojection techniques. First, the KLT tracker is used to track the corresponding feature points in two control images. Next, four planar points are specified in each(More)
A novel wearable interface is developed to help the disabled fully interact with the computer and operate home appliances. It is practical, natural, and less prone to fatigue, and it can serve as a general-purpose interface. Compared with interfaces based on image processing, infrared, and laser techniques, the current interface is relatively insensitive to(More)
Natural feature tracking is a popular research topic in computer vision and has been used in Augmented Reality (AR) applications. Current natural feature trackers have two major limitations in AR applications. Firstly, the natural features may be lost during the tracking process such that the annotations that are linked to these natural features will also(More)
Research on the genetics of natural populations was revolutionized in the 1990s by methods for genotyping noninvasively collected samples. However, these methods have remained largely unchanged for the past 20 years and lag far behind the genomics era. To close this gap, here we report an optimized laboratory protocol for genome-wide capture of endogenous(More)
As a goal-directed behavior, foraging for nectar functions on the basis of a sequence of innate stereotyped movements mainly regulated by sensory input. The operation of this inherited program is shaped by selective pressures acting on its efficiency, which is largely dependent upon the way the system handles sensory information. Flowers offer a wealth of(More)