Computer Vision and Applications: Concise Edition by Bernd Jahne PDF

By Bernd Jahne

ISBN-10: 0123797772

ISBN-13: 9780123797773

In keeping with the hugely profitable 3-volume reference guide of laptop imaginative and prescient and purposes , this concise variation covers in one quantity the complete spectrum of laptop imaginative and prescient ranging shape the imaging strategy to high-end algorithms and purposes. This publication involves 3 elements, together with an program gallery, and is observed by means of an interactive CD-ROM. * Bridges the distance among concept and useful functions * Covers sleek recommendations in machine imaginative and prescient in addition to glossy advancements in imaging sensor expertise * provides a distinct interdisciplinary procedure protecting assorted parts of recent technology * An accompanying CD-ROM offers complete textual content with links for speedy looking and skimming in addition to reference fabric, interactive software program elements, code examples, snapshot fabric, full-color figures, and references to web resources

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4 for wavelengths below 500 nm. This increased absorption of blue light compared to red light is responsible for the reddish appearance of gold surfaces in contrast to the white metallic glare of silver surfaces. Diffuse reflection. Very few materials have pure specular surface reflectivity. Most surfaces show a mixture of matte and specular reflection. As soon as surface microroughness has the same scale as the wavelength of radiation, diffraction at the microstructures occurs. At larger scales, microfacets with randomly distributed slopes relative to the surface normal are reflecting incident light in various directions (Fig.

Specification of the position on the surface can be omitted if the emitted flux Φ is equally distributed over an extended area S. In this case M = Φ/S. 10) Again, incident radiation is integrated over all angles of the enclosing hemisphere (Fig. 5b). Radiant exitance characterizes an actively radiating source while irradiance characterizes a passive receiver surface. Both are measured in W m−2 and cannot be distinguished by their units if not further specified. Radiant intensity. Radiant intensity I describes the angular distribution of radiation emerging from a point in space.

3 2 Radiation and Illumination Definition of radiometric quantities Radiant energy and radiant flux. Radiation carries energy that can be absorbed in matter heating up the absorber or interacting with electrical charges. Radiant energy Q is measured in units of Joule (1 J = 1 Ws). It quantifies the total energy emitted by a source or received by a detector. 6) passing through or emitted from a surface. Radiant flux has the unit watts (W) and is also frequently called radiant power , which corresponds to its physical unit.

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Computer Vision and Applications: Concise Edition by Bernd Jahne

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