Multispectral image correction for geometric measurements. - In: 2014 Joint IMEKO TC1-TC7-TC13 Symposium: Measurement Science Behind Safety and Security, (2015), 012037, insges. 6 S.
Multispectral- and hyperspectral imaging technologies enable new possibilities in industrial measurement applications. Based on the knowledge of remote sensing a lot of investigations were made in the last decades of years. Nevertheless the demands on remote sensing versus technical multi spectral image processing are quite different. In the field of precise geometric measurement technics it is necessary to correct the image data between different spectral channels with a high accuracy, normally in the micron range. Otherwise the geometric absolute value of fail detection on edges can be become very large. State of the art in industrial imaging and detection of geometric features is the calibration of only one imaging channel. In this paper, the studies on a twelve channel multi spectral imager were presented. For the applied filter wheel system, investigations on the improvement of lens aberration as well as for the defocus problem were made. Therefore a calibrated high precision geometric test chart was used to calibrate the system geometrically. To correct the geometric errors on the image plane a special moving filter approach, based on linear convolution, was developed. For every channel a calibration matrix were calculated and applied on the image system output.
http://dx.doi.org/10.1088/1742-6596/588/1/012037
A new approach on restoration of dynamic measurement uncertainties in optical precision coordinate metrology. - In: 2014 Joint IMEKO TC1-TC7-TC13 Symposium: Measurement Science Behind Safety and Security, (2015), 012021, insges. 7 S.
This paper presents a new approach to the restoration of dynamic influenced measurement uncertainties in optical precision coordinate metrology (OPCM) using image sensors to measure geometrical features. Dynamic measurements within the context of this paper are based upon relative motion between the imaging setup (CCD-camera and optical system) and the measuring object respectively the measuring scene. The dynamic image acquisition causes image motion blur effects, which downgrades the uncertainties of the measurand. The approach presented deals with a new technique to restore motion degraded images using different methods to analyze important image features by extending the famous state of the art Richardson-Lucy image restoration technique using a new convergence criteria based on the variation of the detectable sub-pixel edge position of each iteration.
http://dx.doi.org/10.1088/1742-6596/588/1/012021
Identification and online monitoring of construction raw materials and biological objects by optical methods. - In: Optics and spectroscopy, ISSN 1562-6911, Bd. 118 (2015), 2, S. 328-334
http://dx.doi.org/10.1134/S0030400X15020022
Low temperature grown photoconductive antennas for pulsed 1060 nm excitation: influence of excess energy on the electron relaxation. - In: Journal of infrared, millimeter, and terahertz waves, ISSN 1866-6906, Bd. 36 (2015), 1, S. 60-71
http://dx.doi.org/10.1007/s10762-014-0119-3
High resolution acquisition and processing of fluorescent microscopic images for quality assurance of food. - In: Measurement, Bd. 61 (2015), S. 123-128
http://dx.doi.org/10.1016/j.measurement.2014.10.007
Nahfeldmobilität - der Schlüssel zu einem selbstbestimmten Leben im Alter. - In: Mobilogisch!, ISSN 1611-9169, (2014), 4, S. 1-5
Prüfplanung. - In: Masing Handbuch Qualitätsmanagement, (2014), S. 523-550
Literaturangaben
Handheld 3-D scanning with automatic multi-view registration based on visual-inertial navigation. - In: International journal of optomechatronics, ISSN 1559-9620, Bd. 8 (2014), 4, S. 313-325
http://dx.doi.org/10.1080/15599612.2014.942931
Wavelet based identification of substances in Terahertz tomography measurements. - In: Journal of infrared, millimeter, and terahertz waves, ISSN 1866-6906, Bd. 35 (2014), 11, S. 974-986
http://dx.doi.org/10.1007/s10762-014-0106-8
Array projection of aperiodic sinusoidal fringes for high-speed three-dimensional shape measurement. - In: Optical engineering, ISSN 1560-2303, Bd. 53 (2014), 11, S. 112208, insges. 12 S.
https://doi.org/10.1117/1.OE.53.11.112208