Results 251 to 260 of about 220,607 (288)
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IEEE International Conference on Computational Photography (ICCP), 2013
We introduce a framework for outdoor photometric stereo utilizing natural environmental illumination. Our framework extends beyond existing photometric stereo methods intended for laboratory environments to encompass robust outdoor operation in the real world. In this paper, we motivate our framework, describe the components of its processing pipeline,
Lap-Fai Yu +4 more
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We introduce a framework for outdoor photometric stereo utilizing natural environmental illumination. Our framework extends beyond existing photometric stereo methods intended for laboratory environments to encompass robust outdoor operation in the real world. In this paper, we motivate our framework, describe the components of its processing pipeline,
Lap-Fai Yu +4 more
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Photometric titrations—IIDesign and construction of a photometric titrator
Talanta, 1961Abstract The construction of a simple photometric titrator is described. The light receptor is a photo-diode whose design makes it easily possible to exclude external light. Consequently, titrations can be performed with the titration vessel in the open.
H. Flaschka, P. Sawyer
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2010 IEEE Computer Society Conference on Computer Vision and Pattern Recognition, 2010
This paper describes a photometric stereo method that works with a wide range of surface reflectances. Unlike previous approaches that assume simple parametric models such as Lambertian reflectance, the only assumption that we make is that the reflectance has three properties; monotonicity, visibility, and isotropy with respect to the cosine of light ...
Tomoaki Higo +2 more
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This paper describes a photometric stereo method that works with a wide range of surface reflectances. Unlike previous approaches that assume simple parametric models such as Lambertian reflectance, the only assumption that we make is that the reflectance has three properties; monotonicity, visibility, and isotropy with respect to the cosine of light ...
Tomoaki Higo +2 more
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Photometric and Colorimetric Tests
2014The chapter describes the tests that can be performed on lamps and luminaires. The first two sections of the chapter report photometric tests and measurements, starting from the measurement of luminous flux. There are two principal methods for measuring total luminous flux or radiant flux. One incorporates an integrating sphere (Sect. 1), and the other
Mercatelli L, Giannini A, Sani E
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PHOTOMETRIC AND IMAGING PERFORMANCE
EAS Publications Series, 2002Three topics within GAIA photometry have been selected for discussion here. (1) The sampling scheme of the CCDs has been tuned to serve the various purposes: detection of stars, astrometry, broad- and medium-band photometry, and imaging of a small area around each detected star, but the tuning may not yet be optimal.
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American journal of optometry and physiological optic, 1975
ABSTRACT This paper describes how information about the configuration of the cornea can be derived from the raw data obtained with telecentric photokeratometers, and how such data can be expressed and used. It also deals with the interrelations of the different ways of expressing the data.
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ABSTRACT This paper describes how information about the configuration of the cornea can be derived from the raw data obtained with telecentric photokeratometers, and how such data can be expressed and used. It also deals with the interrelations of the different ways of expressing the data.
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Proceedings 1992 IEEE Computer Society Conference on Computer Vision and Pattern Recognition, 2003
An active vision technique for determining the absolute depth of surfaces is described. The algorithm assumes a very general model for the reflectance properties of the surface, and is valid for most of the shading models commonly used in computer vision work.
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An active vision technique for determining the absolute depth of surfaces is described. The algorithm assumes a very general model for the reflectance properties of the surface, and is valid for most of the shading models commonly used in computer vision work.
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An Inexpensive Photometric Wedge
American Journal of Ophthalmology, 1977D D, Bode, R A, Manson
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