Spectral theory of ordinary differential equations — In mathematics, the spectral theory of ordinary differential equations is concerned with the determination of the spectrum and eigenfunction expansion associated with a linear ordinary differential equation. In his dissertation Hermann Weyl… … Wikipedia
spectral picture — spektrinis atvaizdavimas statusas T sritis fizika atitikmenys: angl. spectral mapping; spectral picture; spectrum representation vok. spektrische Darstellung, f; Spektrumbild, n rus. спектральное изображение, n; спектральное представление, n… … Fizikos terminų žodynas
Spectral theory of compact operators — In functional analysis, compact operators are linear operators that map bounded sets to precompact ones. Compact operators acting on a Hilbert space H is the closure of finite rank operators in the uniform operator topology. In general, operators … Wikipedia
Spectral rendering — In computer graphics, spectral rendering is where a scene s light transport is modeled with real wavelengths. This process is typically a lot slower than traditional rendering, which renders the scene in its red, green, and blue components and… … Wikipedia
Multi-spectral image — Multi spectral imaging is a technology originally developed for space based imaging. Multi spectral imaging can capture light from frequencies beyond the visible light range, such as infrared. This can allow extraction of additional information… … Wikipedia
Least-squares spectral analysis — (LSSA) is a method of estimating a frequency spectrum, based on a least squares fit of sinusoids to data samples, similar to Fourier analysis. [cite book | title = Variable Stars As Essential Astrophysical Tools | author = Cafer Ibanoglu |… … Wikipedia
Tone mapping — is a technique used in image processing and computer graphics to map a set of colours to another; often to approximate the appearance of high dynamic range images in media with a more limited dynamic range. Print outs, CRT or LCD monitors, and… … Wikipedia
Photon mapping — In computer graphics, photon mapping is a two pass global illumination algorithm developed by Henrik Wann Jensen that solves the rendering equation. Rays from the light source and rays from the camera are traced independently until some… … Wikipedia
Leray spectral sequence — In mathematics, the Leray spectral sequence was a pioneering example in homological algebra, introduced in 1946 by Jean Leray. The formulation was of a spectral sequence, expressing the relationship holding in sheaf cohomology between two… … Wikipedia
Reverberation mapping — is to day a statistical method within astrophysics preferably used in connection with velocity analysis of gaseous discs around supermassive compact objects. The technique is used to measure the size of the broad emission line region and mass of… … Wikipedia
