Download PDF by Marco Alexander Treiber: An Introduction to Object Recognition: Selected Algorithms

By Marco Alexander Treiber

Rapid improvement of laptop has enabled utilization of computerized item acceptance in more and more purposes, starting from business photo processing to clinical functions, in addition to projects caused via the frequent use of the web. every one region of program has its particular necessities, and for that reason those can't all be tackled thoroughly via a unmarried, general-purpose set of rules.

This easy-to-read text/reference offers a finished creation to the sphere of item attractiveness (OR). The publication provides an summary of the varied functions for OR and highlights vital set of rules periods, providing consultant instance algorithms for every category. The presentation of every set of rules describes the elemental set of rules movement intimately, entire with graphical illustrations. Pseudocode implementations also are incorporated for lots of of the equipment, and definitions are provided for phrases that could be strange to the amateur reader. helping a transparent and intuitive instructional variety, using arithmetic is saved to a minimum.

Topics and features:

  • Presents instance algorithms protecting international methods, transformation-search-based tools, geometrical version pushed equipment, 3D item acceptance schemes, versatile contour becoming algorithms, and descriptor-based methods
  • Explores each one process in its entirety, instead of targeting person steps in isolation, with an in depth description of the circulate of every set of rules, together with graphical illustrations
  • Explains the $64000 techniques at size in a simple-to-understand type, with a minimal utilization of mathematics
  • Discusses a huge spectrum of purposes, together with a few examples from advertisement products
  • Contains appendices discussing themes with regards to OR and frequent within the algorithms, (but now not on the middle of the equipment defined within the chapters)

Practitioners of business picture processing will locate this straightforward advent and review to OR a necessary reference, as will graduate scholars in machine imaginative and prescient courses.

Marco Treiber is a software program developer at ASM meeting platforms, Munich, Germany, the place he's Technical Lead in photo Processing for the imaginative and prescient procedure of SiPlace placement machines, utilized in SMT assembly.

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Additional resources for An Introduction to Object Recognition: Selected Algorithms for a Wide Variety of Applications

Sample text

A brute force approach which exhaustively evaluates a densely sampled search space is usually not acceptable because the algorithm runtime is too long. As a consequence a more intelligent strategy is required. , affine or similarity transforms. 2 Transformation Classes Before we take a closer look at some methods which search in the transformation space we have to clarify what kind of transformation is estimated. Commonly used transformation classes are similarity transformations and affine transformations.

The characterization of objects by means of Fourier descriptors is not restricted to the object boundary (as it is the case with the centroid distance function). Fourier descriptors can also be derived from the region covered by the object. A calculation based on regions is advantageous if characteristic information of the object is not restricted to the boundary. The descriptor representation is more robust to boundary variations if regional information is considered in such cases. A straightforward approach would be to calculate the descriptors from the 2D Fourier transform of the intensity image showing an object.

Each parameter combination defines a transformation between the model data and the scene image. The aim is to find a combination which maximizes M. 1007/978-1-84996-235-3_3, C Springer-Verlag London Limited 2010 41 42 3 Transformation-Search Based Methods the similarity (or minimizes a distance, respectively). , the searched object is actually present at the position defined by the transformation parameters. Occlusion (leading to missing points in the scene image point set) and background clutter (leading to additional points in the scene image point set) both result in a reduction of the percentage of points that can be matched correctly between scene image and the model.

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