A Flexible New Technique for Camera Calibration
IEEE Transactions on Pattern Analysis and Machine Intelligence
Sensetable: a wireless object tracking platform for tangible user interfaces
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
Camera-Based Calibration Techniques for Seamless Multiprojector Displays
IEEE Transactions on Visualization and Computer Graphics
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We propose a novel technique for background estimation on the tabletop systems that have an information display on the tabletop and observe tabletop objects with a camera In such systems, the background of an image observed with the camera includes the image shown on the tabletop display The background varies according to the information presented on the tabletop display Although we can estimate the background image from a displayed image based on traditional geometric registration and photometric correction, the background image is not sufficiently accurate in terms of pixel value blending for background subtraction We estimate the background image in high accuracy based on the pixel structures of the display and the camera We experimentally evaluate the methods by comparing the estimated image with the observed image.