منابع مشابه
Multiscale optics for enhanced light collection from a point source.
High-efficiency collection of photons emitted by a point source over a wide field of view (FoV) is crucial for many applications. Multiscale optics offer improved light collection by utilizing small optical components placed close to the optical source, while maintaining a wide FoV provided by conventional imaging optics. In this work, we demonstrate collection efficiency of 26% of photons emit...
متن کاملGeometric Point Light Source Calibration
We present a light position calibration technique based on a general arrangement of at least two reflective spheres in a single image. Contrary to other techniques we do not directly intersect rays for triangulation but instead solve for the optimal light position by evaluating the image-space error of the light highlights reflected from the spheres. This approach has been very successful in th...
متن کاملThe emission of light from spark discharges.
Cillie, G. C. 1932' M o n . Not. R. Astr. Soc. 92, 820. Gillie, G. C. 1936 Mon. Not. R. Astr. Soc. 96, 771. Kramers, H. A. 1923 Phil. Mag. 46, 836. Menzel, D. H. & Cilli6, G. C. 1935 Harvard Circular, no. 410. Menzel, D. H. & Cillie, G. C. 1937 Astrophys. 85, 88. Page, T. L. 1936 Mon. Not. R. Astr. Soc. 96, 604 or Commun. Univ. no. 7. Page, T. L. 1938 Nature, 141, 1137. Pannekoek, A. 1938 Mon. ...
متن کاملReconstructing Shape from Shading Images under Point Light Source Illumination
A new photometric method is proposed fo r determining the 3-D shape of t he object from multiple shading Images under the point light source illumination. When the surface is t he perfect diffuser with the uniform reflectance, an algorithm fo r the determination of 3-D shape with positions is developed by using the method of least squares and basing on the principle of the monocular vision and ...
متن کاملPerformance Analysis of Point Light Source Estimation
In this paper, the performance of point light source parameter estimation from two video images is analyzed in terms of estimation theory. The illumination parameters are the intensity and direction of a single distant point light source in presence of ambient light. Known illumination estimation methods evaluate temporal changing shading on the surface of rotating objects in two video images. ...
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ژورنال
عنوان ژورنال: Nature
سال: 1950
ISSN: 0028-0836,1476-4687
DOI: 10.1038/165358a0