Modelling piece-wise continuous transfer functions for digital image processing
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United States of America Patent
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Aug 11, 2009
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Feb 11, 2004
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Feb 11, 2004
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Abstract
Methods and apparatus, including computer program products, for modelling a non-linear transfer function with a power law function. A transfer function is received. Iteratively, until a termination flag is set, a first power law function is received, an auxiliary function is generated from the transfer function and local differences between the transfer function and the first power law function, a second power law function is fitted to the auxiliary function, a modelling error is calculated from the second power law function and the transfer function, and the termination flag is set when the modelling error is less than a predetermined value.
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