منابع مشابه
A hemispherical imaging camera
Most of the existing panoramic cameras have cylindrical field of view (FOV) which has a 360 width in azimuth, but a limited height in elevation. However, a hemispherical (or near spherical) FOV is highly desirable in many applications such as robot navigation and surveillance. This paper presents a planarmirror-based panoramic camera (HEM) which is capable of acquiring nearly hemispherical FOV ...
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UNLABELLED Two new tools on the UCSC Genome Browser web site provide improved ways of combining information from multiple datasets, optionally including the user's own custom track data and/or data from track hubs. The Data Integrator combines columns from multiple data tracks, showing all items from the first track along with overlapping items from the other tracks. The Variant Annotation Inte...
متن کاملA simple method to calibrate hemispherical photographs
Objectives Hemispherical photography is used to characterize the structure of canopies and measure the gap fraction directional variation to retrieve variables such as the leaf area index (LAI), the fAPAR {Jonckheere, 2004 #3541};{Weiss, 2004 #2872}. Optical systems are not perfect and at least two main characteristics are required: • The coordinates of the optical centre • The projection funct...
متن کاملA hemispherical power asymmetry from inflation
Measurements of cosmic microwave background temperature fluctuations by the Wilkinson Microwave Anisotropy Probe indicate that the fluctuation amplitude in one half of the sky differs from the amplitude in the other half. We show that such an asymmetry cannot be generated during single-field slow-roll inflation without violating constraints to the homogeneity of the Universe. In contrast, a mul...
متن کاملHemispherical Confocal Imaging
We propose a new imaging method called hemispherical confocal imaging to visualize clearly a particular depth in a 3-D scene. The key optical component is a turtleback reflector which is a specially designed polyhedral mirror. To synthesize a hemispherical aperture, we combined the turtleback reflector with a coaxial camera and projector, to create on a hemisphere many virtual cameras and proje...
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ژورنال
عنوان ژورنال: Journal of the Optical Society of America
سال: 1922
ISSN: 0030-3941
DOI: 10.1364/josa.6.001040