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Annotation of Video by Alignment to Reference Imagery
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Annotation of Video by Alignment to Reference Imagery
Keith J. Hanna7  , Harpreet S. Sawhney7, Rakesh Kumar7, Y. Guo7 and S. Samarasekara7
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Sarnoff Corporation, CN5300, Princeton, NJ, 08530 |
Abstract
Video as an entertainment or information source in consumer, military, and broadcast television applications is widespread.
Typically however, the video is simply presented to the viewer, with only minimal manipulation. Examples include chroma-keying
(often used in news and weather broadcasts) where specific color components are detected and used to control the video source.
In the past few years, the advent of digital video and increases in computational power has meant that more complex manipulation
can be performed. In this paper we present some highlights of our work in annotating video by aligning features extracted
from the video to a reference set of features.
Video insertion and annotation require manipulation of the video stream to composite synthetic imagery and information with
real video imagery. The manipulation may involve only the 2D image space or the 3D scene space. The key problems to be solved
are: (i) indexing and matching to determine the location of insertion, (ii) stable and jitter-free tracking to compute the
time variation of the camera, and (iii) seamlessly blended insertion for an authentic viewing experience. We highlight our
approach to these problems by showing three example scenarios: (i) 2D synthetic pattern insertion in live video, (ii) annotation
of aerial imagery through geo-registration with stored reference imagery and annotations, and (iii) 3D object insertion in
a video for a 3D scene.
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