By Lalit K. Mestha, Sohail A. Dianat
An entire One-Stop source whereas electronic colour is now the expertise of selection for printers, the data required to handle the standard and productiveness problems with those units is scattered throughout a number of applied sciences, as is its aiding literature. Bringing jointly info from assorted fields, regulate of colour Imaging structures: research and layout is the 1st booklet to supply accomplished insurance of the basics and algorithms of the varied disciplines linked to electronic colour printing in one source. The authors assessment the historical past of electronic printing structures, discover its present prestige, and clarify basic strategies, together with: electronic picture formation, sampling, quantization, snapshot coding, spot colour calibration, and one- and multi-dimensional tone keep watch over of colour administration structures — together with approach physics and controls. a whole Self-Tutorial With Over one hundred fifty layout Examples and one hundred twenty workout difficulties according to the authors’ 3 many years of hands-on technical and educating adventure, the textual content presents engineers and technicians with an end-to-end realizing of the colour printing method, and is helping them construct a beginning drawn from the various disciplines had to deal with and keep an eye on electronic construction printers. The keep watch over idea and strategies offered during this e-book are state-of-the paintings for colour printing structures; besides the fact that, assurance of theoretical techniques and arithmetic are stored to the fundamentals, because the ebook is designed to educate hand’s on abilities that may enable practitioners to realize a right away realizing of caliber and productiveness issues. the knowledge supplied may also help practitioners construct the technical talents had to support pioneer the subsequent new release of principles, algorithms, and techniques that might extra extend the frontier of this speedily evolving expertise.
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Additional info for Control of Color Imaging Systems: Analysis and Design
At each pixel, a photodiode converts the incident photons into electrons that are subsequently counted as the pixel intensity. In many imaging systems, it is customary to quantize the pixel value to 8 bits (256 levels), since it is argued that the human eye cannot distinguish more than 100–200 brightness levels. 17 Laplacian distribution with a 3 bit optimum quantizer. uncommon in medical imaging systems. It is well known that uniform quantization of the intensity values (photon counts) usually creates visual artifacts.
G Bestmann, Method and apparatus for calibration of color values, US Patent 5,481,380, Jan 2, 1996. 20. LK Mestha, R Bala, and LK Mestha, Use of spectral sensors for automatic media identiﬁcation and improved scanner correction, US Patent 6,750,442, Jun. 15, 2004. 21. PK Gurram, SA Dianat, LK Mestha, and R Bala, Comparison of 1-D, 2-D and 3-D printer calibration algorithms with printer drift, NIP21: Proceedings of the IS&T’s 21st International Conference on Digital Printing Technologies, Baltimore, MD, Sep.
13 SQ for 1-D signals. 14 Quantization function Q(x). D¼ xmax À xmin xmax À xmin ¼ L 2B (2:41) The decision boundaries are related to the quantization step size D by di À diÀ1 ¼ D 1 i L (2:42) The reconstruction levels are chosen to be halfway between the decision boundaries in order to minimize the mean-squared error (MSE). 4 Design a uniform 2 bit (4-level) quantizer for a signal with dynamic range between 0 and 1. 15 PDF of quantization noise. 15. In such a case, the quantization error for any signal sample would be uniformly distributed between À D2 and D2 .
Control of Color Imaging Systems: Analysis and Design by Lalit K. Mestha, Sohail A. Dianat