Download Image processing, analysis, and machine vision by Milan Sonka PDF

By Milan Sonka

This powerful textual content presents deep and vast insurance of the entire variety of issues encountered within the box of photograph processing and computer imaginative and prescient. for this reason, it may well serve undergraduates, graduates, researchers, and pros trying to find a readable reference. The book's encyclopedic insurance of themes is vast, and it may be utilized in multiple path (both snapshot processing and laptop imaginative and prescient classes). furthermore, whereas complex arithmetic isn't really had to comprehend uncomplicated techniques (making this a sensible choice for undergraduates), rigorous mathematical insurance is integrated for extra complicated readers. it's also wonderful via its easy-to-understand set of rules descriptions of inauspicious recommendations, and a wealth of conscientiously chosen difficulties and examples.

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Example text

2. This is a three-winding, three-leg mesh transformer. If a simple threewinding ideal transformer (Fig. 2, upper right) is selected to simulate this transformer, the output voltage phases will be correct only for some excitations. If, for example, the center winding is excited, then the voltages on the other two windings will be correct. However, if one of the SPICE Modeling of Magnetic Components 19 + S1 + P + S2 P S1 + S2 + + - S1 + P + S2 S1 P + -+ + Not Inverted S2 + In Inverted Modeling of mesh transformers requires caution.

The core loss has not been modeled in this SPICE 3 version. The model is based upon the premise that a magnetic element is represented by an inductance. The inductance is related to the permeability and geometrical properties of the core. The current through the inductor can then be simply stated as I= 1 L Vdt This function can be modeled as a simple integrator. To properly represent the B-H loop characteristics, the nonlinearities of the inductance need to be defined. Fortunately, graphical data are available that provide the percentage of initial permeability versus DC bias for several core types.

Note: In PSpice, if all the inductor couplings have the same value the coupling element may also be written as Kall L1 L2 L3 Couple value. 6 SPICE coupled inductor model and associated netlist. 7 Structure of the Pi model. Mutual inductance can be expressed in alternative form using coefficients of coupling, ki j . 3) In a transformer, ki j will normally be very close to 1. A typical PSpice listing for a coupled inductor is shown in Fig. 6. This is an abstract model. Most engineers, however, will be thinking in terms of a circuit model that has leakage and magnetizing inductance and a turns ratio.

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