Keith Yerex

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The problem of capturing real world scenes and then accurately rendering them is particularly difficult for finescale 3D structure. Similarly, it is difficult to capture, model and animate non-rigid motion. We present a method where small image changes are captured as a time varying (dynamic) texture. In particular, a coarse geometry is obtained from a(More)
In tele-robotics delayed visual feedback to the human operator can degrade task performance significantly. To improve this, predictive display, uses a scene model to estimate and render immediate visual feedback based on the operator’s control commands. Traditional predictive display involves the calibration and overlay of an a-priori model with the delayed(More)
A long standing goal in image-based modeling and rendering is to capture a scene from camera images and construct a sufficient model to allow photo-realistic rendering of new views. With the confluence of computer graphics and vision, the combination of research on recovering geometric structure from un-calibrated cameras with modeling and rendering has(More)
We present a method that using only an uncalibrated camera allows the capture of object geometry and appearance, and then at a later stage registration and AR overlay into a new scene. Using only image information first a coarse object geometry is obtained using structure-from-motion, then a dynamic, view dependent texture is estimated to account for the(More)
In tele-manipulation, delays as small as a few tenths of a second can affect performance. Robot operators dissociate their control actions with what they see on delayed video and have to adopt slow move-and-wait strategies or may completely fail to perform high precision tasks. Predictive Display (PD) mitigates this problem by rendering visual feedback that(More)
In both computer graphics and computer vision, scenes and objects must be represented mathematically in some way. Representations tailored to ease scene acquisition in vision, may be inefficient to render. Likewise, models designed specifically for efficient rendering may be difficult, if not impossible, to capture from cameras. In this thesis, we explore(More)
Virtual Heritage (VH) is concerned with the digital representation and presentation of cultural artifacts along with the stories and facts that accompany them. In this work, we present an inexpensive, easy to use, Image-Based Modeling and Rendering (IBMR) system for capturing geometric and appearance models of heritage objects. Furthermore, we present(More)
Applications such as free viewpoint 3D television or tele-presence would allow viewers to observe a live scene from an arbitrary viewpoint, ideally using only video as input. While this is already an incredibly difficult problem, the nature of these applications would require that both scene acquisition and rendering occur in real-time. Few methods are(More)