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The Photometric Sensibility of the Eye and the Precision of Photometric Observations
Journal of the Optical Society of America, 1931In this paper data are presented to show that for maximum photometric sensibility the brightness of the photometric field should be adjusted so that a brightness level of from 20 to 30 millilamberts is secured. At this brightness the difference fraction ΔB/B has a value of 1.37 percent.
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Learning to Minify Photometric Stereo
Computer Vision and Pattern Recognition, 2019Photometric stereo estimates the surface normal given a set of images acquired under different illumination conditions. To deal with diverse factors involved in the image formation process, recent photometric stereo methods demand a large number of ...
Junxuan Li +3 more
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Semi-Calibrated Photometric Stereo
IEEE Transactions on Pattern Analysis and Machine Intelligence, 2020While conventional calibrated photometric stereo methods assume that light intensities and sensor exposures are known or unknown but identical across observed images, this assumption easily breaks down in practical settings due to individual light bulb's
Donghyeon Cho +3 more
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Photometric Displacement Transducer
IEEE Transactions on Biomedical Engineering, 1969Measurements of variations in intensity of light reflected from a moving surface provide a method for quantitating displacement. A system to monitor displacements of a few microns is easily constructed. This technique has wide application in biological experiments, offering the advantage of probeless displacement monitoring.
Gerald W. Timm, William E. Bradley
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[1990] Proceedings Third International Conference on Computer Vision, 1991
The author compares the photometric effects of motion (which is defined as the variation of a point's imaged intensity as a consequence of motion) and the geometric effects of motion (which is defined as the variation in projected surface geometry as a consequence of motion).
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The author compares the photometric effects of motion (which is defined as the variation of a point's imaged intensity as a consequence of motion) and the geometric effects of motion (which is defined as the variation in projected surface geometry as a consequence of motion).
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Photometric determination of nitrite
Talanta, 1981A new sensitive colour reaction for nitrite determination is presented. The method is based on the reaction of nitrite with p-aminobenzoic acid to form a diazonium ion, which is coupled with 8-hydroxyquinoline, in alkaline medium, to form a reddish-orange water-soluble azo dye.
W.A. Bashir, S. Flamerz
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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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GAIA Photometric System: Simulation of Photometric Observations
2002We present a software package developed for modelling of the GAIA photometric observations. The modelling procedure is very flexible and fully controlled via the parameter file. Therefore, configuration of the GAIA telescopes and photometric systems, as well as the object samples under investigation, can be adjusted easily.
Vladas Vansevičius +2 more
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Deep Photometric Stereo Network
2017 IEEE International Conference on Computer Vision Workshops (ICCVW), 2017This paper presents a photometric stereo method based on deep learning. One of the major difficulties in photometric stereo is designing can appropriate reflectance model that is both capable of representing real-world reflectances and computationally ...
Hiroaki Santo +4 more
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Classification of Photometric Factors Based on Photometric Linearization
2006We propose a new method for classification of photometric factors, such as diffuse reflection, specular reflection, attached shadow, and cast shadow. For analyzing real images, we utilize the photometric linearization method which was originally proposed for image synthesis. First, we show that each pixel can be photometrically classified by the simple
Yasunori Ishii +2 more
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