zero crossings

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• Reconstruction from zero crossings — The problem of reconstruction from zero crossings can be stated as: given the zero crossings of a continuous signal, is it possible to reconstruct the signal (to within a constant factor)? Worded differently, what are the conditions under which a …   Wikipedia

• Zero crossing — is a commonly used term in electronics, mathematics, and image processing. In mathematical terms, zero crossing basically means the changing of sign (e.g. from positive to negative), that is represented with a crossing of the axis (zero value) in …   Wikipedia

• Zero crossing threshold detector — A zero crossing threshold detector is an electronic circuit that consists of an operational amplifier with an input voltage at its positive input (see circuit diagram). Often used in conjunction with other circuit elements, it usually functions… …   Wikipedia

• Climate Ground Zero — (CGZ), founded in February 2009, is a non violent civil disobedience campaign against mountaintop removal mining based in the southern coalfields of West Virginia[1]. According to their website, Climate Ground Zero believes “that the irrevocable… …   Wikipedia

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• Hilbert-Huang transform — The Hilbert Huang Transform (HHT) is a way to decompose a signal into so called intrinsic mode functions (IMF), and obtain instantaneous frequency data. It is designed to work well for data that are nonstationary and nonlinear. In contrast to… …   Wikipedia

• Scale space implementation — Scale space Scale space axioms Scale space implementation Feature detection Edge detection Blob detection Corner detection …   Wikipedia

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• Comparison of image processing software — The following table provides a comparison of image processing software. Functionality Matlab*[1] Mathematica[2] imageJ FIJI (software) Population Extract alpha channel No …   Wikipedia