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24 May 1999 Composing virtual environment using images of digital camera
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Proceedings Volume 3639, Stereoscopic Displays and Virtual Reality Systems VI; (1999) https://doi.org/10.1117/12.349410
Event: Electronic Imaging '99, 1999, San Jose, CA, United States
Abstract
We present a new method to make virtual environment by using a sphere for reference. Images taken with digital camera or video camera are projected to the sphere. Relative orientation of adjacent images is determined by a linear transform and directions of all the images relative to the sphere are determined by multiplying the linear transform and directions of all the images relative to the sphere are determined by multiplying the linear transform matrix. Images are dynamically composed and projected back at a selected viewing direction without using an environment map. We have derived mathematical formula of the transform matrix. To improve the back projection speed, we also make environment maps by projecting images from the sphere to equator plane by setting projection center at southern or northern pole of the sphere. 3D scene can be projected to two circles in almost uniform pixel density without singularity at the poles. Distortion of lens causes large accumulated registration error. We developed a method for calibrating and correcting the distortion using matched corresponding points of adjacent images. A pyramid-based image matching method is also developed to reduce accumulated registration error.
© (1999) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Haike Guan, Shin Aoki, and Koichi Ejiri "Composing virtual environment using images of digital camera", Proc. SPIE 3639, Stereoscopic Displays and Virtual Reality Systems VI, (24 May 1999); https://doi.org/10.1117/12.349410
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