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Advances in Biometrics, ICB 2006 by David Zhang, Anil K. Jain

By David Zhang, Anil K. Jain

This e-book constitutes the refereed court cases of the overseas convention on Biometrics, ICB 2006, held in Hong Kong, China in January 2006.

The 104 revised complete papers offered have been conscientiously reviewed and chosen from 192 submissions. Biometric standards lined via the papers are assigned to stand, fingerprint, iris, speech and signature, biometric fusion and function review, gait, keystrokes, and others. moreover the result of the Face Authentication pageant (FAC 2006) also are introduced during this volume.

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Use the rename method to rename the node. Understanding PyMEL data and math types PyMEL's intuitive use of type hierarchies does not end with Maya node types. It also provides a very useful wrapper around Maya's mathematical data types, including vectors, quaternions, and matrices. datatypes namespace. Let's take a closer look at xform's transform information. 0] The translation value of the sphere transform, which is highlighted, appears to be a list. It isn't. Vector. Sometimes we need to more aggressively introspect objects.

It states, roughly, that if S is a subclass of T, then a program can use an instance of S instead of T without a change in behavior. It is a fundamental principle of good object-oriented design and manifests itself in well-designed frameworks such as PyMEL. The fact that types inherit the behavior of their parents is important to keep in mind as you go through the rest of this book and program with PyMEL. Don't worry if you don't fully understand how inheritance works or how to best leverage it.

Third, Transform is also a DagNode. We can use our knowledge of Maya (or graph theory, if you're into that) to infer that this means the object can have a parent, children, instances, and so on. This is a great example where our knowledge of Maya maps directly onto PyMEL, and we aren't required to learn a new paradigm to understand how the PyMEL framework works. Note We build custom Maya nodes in Chapter 7, Taming the Maya API. , ) We can immediately understand much of how a PyMEL Joint works if we already understand Transform.

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