10.14489/td.2017.10.pp.044-051

2017, 10 October

DOI: 10.14489/td.2017.10.pp.044-051

Makhov V. E., Potapov A. I., Shaldaev S. E.
INVESTIGATION OF THE BORDER LIMITS BY THE METHOD OF DISTRIBUTION OF CONTRAST WITH USING THE OPTICAL-ELECTRONIC SYSTEM. Part 1
(pp. 44-51)

Abstract. Background. Optoelectronic systems recording the image of a controlled object are widely used in automated systems for industrial control of the shape and linear dimensions of products and process equipment. It is often not possible to ensure the conditions for carrying out high-precision measurements of the shape of products in the process, which reduces the productivity of the main production. Therefore, the actual task of modern automated production is the development of methods and means for high-precision measurements of geometric parameters of the shape of products in a wide range of changes in external conditions. Materials and/or methods. In order to create optimal conditions for use of algorithms for measuring fragments form parts used in the method of converting the original image into curves limits of its contrast. The analysis methods of forming curves of contrasts and light character of distribution in the profile lines showed the need to consider the effects of pixilation, and algorithmic processing. The method of analysis of the luminance distribution in the specified profile lines is proposed to calculate the coordinates of the image function boundaries. The virtual instrument based on computer technology company National Instruments is developed and used for modeling studies of algorithms and the accuracy of measuring the shape of the shadow image. Results. It gives the analysis of methods of formation of the contrast curves and light distribution patterns in a given profile lines of the image. The features of the profile line of illumination depending on the method of formation of the contrast curve and tilt boundary curves are investigated. It is necessary to take into consideration the image pixilation and algorithmic processing. The analysis methods of forming curves of contrasts and light character of distribution in the profile lines showed the need to consider the effects of pixilation and algorithmic processing. In order to improve the accuracy of the measurement, methods for eliminating the influence of interfering factors are considered, such as oblique scanning of the profile line, incl. perpendicular to the tangent to the shape of the surface. It is shown that the elimination of the effect of pixilation and local defects in the image is achieved by scanning the angle of the line profile at each measurement point. It is proved that the maximum accuracy of the coordinate of the jump and break the picture profile is achieved by horizontal scan line profile. Conclusion. Studies have shown that the use of an imaging contrast curves allows several times to increase the accuracy of measurement of the surface shape while reducing the requirements for the measuring system. At the same time it proves the possibility of a more precise definition of the coordinates of the jump and break in the borders of the image - less than one pixel. It is shown extension of the scope of precision measurements of geometric shapes in an image with unilateral or partial access to the measured object.

Keywords: video monitoring system, optoelectronic system, filtering the image, the boundary of the shadow image, profile picture line, virtual instrument (VI).

+ - About the Authors Click to collapse

V. E. Makhov (Saint-Petersburg Mining University, St. Petersburg, Russia; Mozhaisky Military Space Academy, St. Petersburg, Russia) E-mail: Данный адрес e-mail защищен от спам-ботов, Вам необходимо включить Javascript для его просмотра.
A. I. Potapov (Saint-Petersburg Mining University, St. Petersburg, Russia) E-mail: Данный адрес e-mail защищен от спам-ботов, Вам необходимо включить Javascript для его просмотра.
S. E. Shaldaev (Mozhaisky Military Space Academy, St. Petersburg, Russia) E-mail: Данный адрес e-mail защищен от спам-ботов, Вам необходимо включить Javascript для его просмотра.

+ - References Click to collapse

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