Practical method for automatic detection of brightest ridge line of photomechanical fringe pattern

This article discusses the algorithms that can be used in the study and analysis of symbols to determine the genre of texts. There are differences in defining the genre of texts. Algorithm is also defined by describing the text, removing unnecessary characters, leaving only the text, and comparing it with the database. The article describes a practical method of automatic recognition of the text genre based on all parameters. Comparing the logistics regression, solution tree, random forest, MLPClassifier, AdaBoostClassifier, svm, GaussianNB algorithms, the choice of the most important parameters for the texts was considered. Defining the genre of texts is now relevant in all areas of the information society.

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Anwendung von Wavelet-Filtern in einem optischen Prozessor zur automatischen Fehlererkennung in Interferogrammen (The Application of Wavelet Filters in Convolution Processors for the Automatic Detection of Faults in Fringe Pattern Systems)

tm - Technisches Messen ◽

10.1524/teme.2002.69.5.236 ◽

2002 ◽

Vol 69 (5/2002) ◽

Author(s):

G. Wernicke ◽

S. Krüger ◽

F. Kallmeyer ◽

H. Gruber ◽

Wolfgang Osten ◽

...

Keyword(s):

Fringe Pattern ◽

Automatic Detection ◽

Wavelet Filters

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The role of differential phase contrast in electron microscopy

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100108027 ◽

1978 ◽

Vol 36 (1) ◽

pp. 176-177

Author(s):

E.M. Waddell ◽

J.N. Chapman ◽

R.P. Ferrier

Keyword(s):

Phase Contrast ◽

Practical Method ◽

Position Vector ◽

Differential Phase ◽

Pure Phase ◽

Differential Phase Contrast ◽

The Difference ◽

Image Position ◽

First Moment

Dekkers and de Lang (1977) have discussed a practical method of realising differential phase contrast in a STEM. The method involves taking the difference signal from two semi-circular detectors placed symmetrically about the optic axis and subtending the same angle (2α) at the specimen as that of the cone of illumination. Such a system, or an obvious generalisation of it, namely a quadrant detector, has the characteristic of responding to the gradient of the phase of the specimen transmittance. In this paper we shall compare the performance of this type of system with that of a first moment detector (Waddell et al.1977).For a first moment detector the response function R(k) is of the form R(k) = ck where c is a constant, k is a position vector in the detector plane and the vector nature of R(k)indicates that two signals are produced. This type of system would produce an image signal given bywhere the specimen transmittance is given by a (r) exp (iϕ (r), r is a position vector in object space, ro the position of the probe, ⊛ represents a convolution integral and it has been assumed that we have a coherent probe, with a complex disturbance of the form b(r-ro) exp (iζ (r-ro)). Thus the image signal for a pure phase object imaged in a STEM using a first moment detector is b2 ⊛ ▽ø. Note that this puts no restrictions on the magnitude of the variation of the phase function, but does assume an infinite detector.

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