Read e-book online An Introduction to Object Recognition: Selected Algorithms PDF

By Marco Alexander Treiber

ISBN-10: 1849962340

ISBN-13: 9781849962346

Rapid improvement of machine has enabled utilization of computerized item attractiveness in increasingly more functions, starting from commercial photo processing to clinical purposes, in addition to projects brought on via the common use of the web. every one zone of program has its particular specifications, and as a result those can't all be tackled correctly by way of a unmarried, general-purpose set of rules.

This easy-to-read text/reference presents a accomplished creation to the sector of item popularity (OR). The publication offers an summary of the varied functions for OR and highlights very important set of rules sessions, proposing consultant instance algorithms for every type. The presentation of every set of rules describes the fundamental set of rules stream intimately, entire with graphical illustrations. Pseudocode implementations also are integrated for plenty of of the equipment, and definitions are provided for phrases that could be strange to the beginner reader. aiding a transparent and intuitive educational kind, using arithmetic is saved to a minimum.

Topics and features:

  • Presents instance algorithms protecting worldwide methods, transformation-search-based equipment, geometrical version pushed tools, 3D item popularity schemes, versatile contour becoming algorithms, and descriptor-based methods
  • Explores each one procedure in its entirety, instead of concentrating on person steps in isolation, with a close description of the movement of every set of rules, together with graphical illustrations
  • Explains the $64000 ideas at size in a simple-to-understand variety, with a minimal utilization of mathematics
  • Discusses a huge spectrum of functions, together with a few examples from advertisement products
  • Contains appendices discussing themes relating to OR and usual within the algorithms, (but no longer on the center of the tools defined within the chapters)

Practitioners of commercial snapshot processing will locate this straightforward advent and evaluation to OR a priceless reference, as will graduate scholars in laptop imaginative and prescient courses.

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

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

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

Sample text

With the help of thresholding. 6) (x,y)∈R where the sum is taken over all “object pixels,” which are defined by the region R. Observe that low-order moments have a physical interpretation. The moment m00 , for example, defines the area of the region. In order to calculate moments as characteristic features of objects independent of their size, normalized moments npq are utilized. 7) 26 2 Global Methods The first-order normalized moments n10 and n01 define the center of gravity of the object, which can be interpreted as the position of the object.

In order to increase performance, this vector is transformed to Fourier space. , [4] or [16]) is a very Fig. 2 Global Feature Vectors 29 compact representation of the data. Just a few Fourier coefficients are sufficient for a distinctive description if we deal with “simple” objects. , calculating the Euclidean distance of the Fourier-transformed feature vector of a scene object to the known Fourier-transformed feature vectors of the prototypes. ). , [5]). Compared to Fourier descriptors, wavelet descriptors have the advantage of containing multi-resolution information in both the spatial and the frequency domain.

15) i=1 M defines the number of samples of the object to be recognized which are available in a training phase. Dimensionality reduction is possible because the samples should look similar and thus contain much redundancy. Therefore the xm should be located close to each other in the transformed space and can be represented by using a new, low-dimensional basis. Mathematically speaking, this amounts to a projection of the original data xm onto a low-dimensional subspace (see Fig. 10 for illustration).

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An Introduction to Object Recognition: Selected Algorithms for a Wide Variety of Applications by Marco Alexander Treiber

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