http://www.tu-ilmenau.de

Logo TU Ilmenau


Drahtlose Verteilsysteme /
Digitaler Rundfunk


headerphoto Drahtlose Verteilsysteme /<br />Digitaler Rundfunk
Ansprechpartner

Prof. Dr. Giovanni Del Galdo

Fachgebietsleiter

Telefon +49 3677 69-4281

E-Mail senden


INHALTE

Dr.-Ing. Alexander Ihlow

Akademischer Rat; Wissenschaftlicher Mitarbeiter

Kontakt

Telefon: +49 3677 69-4284
E-Mail:   alexander.ihlow@tu-ilmenau.de
Büro:     Helmholtzbau Zimmer H 2518a

Forschungsschwerpunkte/Projekte
  • Versorgungsvorhersage für die landmobile Satellitenkommunikation
Lehre

Kurzvita

  • Studium der Elektrotechnik und Informationstechnik an der TU Ilmenau
  • wiss. Mitarbeiter am Leibniz-Institut für Pflanzengenetik und Kulturpflanzenforschung (IPK) Gatersleben
  • 2006 Promotion zum Dr.-Ing. an der Otto-von-Guericke-Universität Magdeburg
  • 2007 Forschungsaufenthalt an der University of Waterloo, Ontario, Kanada
  • Seit Juni 2008 wiss. Mitarbeiter in der Forschergruppe Drahtlose Verteilsysteme / Digitaler Rundfunk
  • April 2011 - März 2012 kommissarischer Fachgebietsleiter

Publikationen

Anzahl der Treffer: 39
Erstellt: Sun, 17 Dec 2017 07:09:37 +0100 in 0.0750 sec


Krieg, Fabian; Kirchhof, Jan; Römer, Florian; Ihlow, Alexander; Del Galdo, Giovanni; Osman, Ahmad
Implementation issues of 3D SAFT in time and frequency domain for the fast inspection of heavy plates. - In: IEEE Xplore digital library. - New York, NY : IEEE, (2017), insges. 4 S.
https://doi.org/10.1109/ULTSYM.2017.8092833
Gradinetti, Christian; Kirchhof, Jan; Krieg, Fabian; Römer, Florian; Ihlow, Alexander; Del Galdo, Giovanni; Theado, Hendrik; Osman, Ahmad
Implementation of sparse signal recovery on FPGA for ultrasonic NDT. - In: IEEE Xplore digital library. - New York, NY : IEEE - New York, NY : IEEE, (2017), insges. 1 S.
https://doi.org/10.1109/ULTSYM.2017.8092308
Andrich, Carsten; Ihlow, Alexander; Kotterman, Wim; Beuster, Niklas; Del Galdo, Giovanni
Using software defined radios for baseband phase measurement and frequency standard calibration. - In: I2MTC - 2017 IEEE International Instrumentation and Measurement Technology Conference : May 22-25, 2017, Politecnico di Torino, Torino, Italy : 2017 proceedings papers. - Piscataway, NJ : IEEE / IEEE International Instrumentation and Measurement Technology Conference (Torino) : 2017.05.22-25., ISBN 978-1-5090-3596-0, (2017), insges. 5 S.

https://doi.org/10.1109/I2MTC.2017.7969657
Beuster, Niklas; Raschke, Florian; Ihlow, Alexander; Andrich, Carsten; Del Galdo, Giovanni
Attaining low uncertainties in measurements with RF signal generators and analyzers. - In: I2MTC - 2017 IEEE International Instrumentation and Measurement Technology Conference : May 22-25, 2017, Politecnico di Torino, Torino, Italy : 2017 proceedings papers. - Piscataway, NJ : IEEE / IEEE International Instrumentation and Measurement Technology Conference (Torino) : 2017.05.22-25., ISBN 978-1-5090-3596-0, (2017), insges. 6 S.

https://doi.org/10.1109/I2MTC.2017.7969907
Kirchhof, Jan; Krieg, Fabian; Römer, Florian; Ihlow, Alexander; Osman, Ahmad; Del Galdo, Giovanni
Sparse signal recovery for ultrasonic detection and reconstruction of shadowed flaws. - In: 2017 IEEE International Conference on Acoustics, Speech, and Signal Processing : proceedings : March 5-9, 2017, Hilton New Orleans Riverside, New Orleans, Louisiana, USA. - Piscataway, NJ : IEEE / IEEE International Conference on Acoustics, Speech, and Signal Processing ; 42 (New Orleans, La.) : 2017.03.05-09., ISBN 978-1-5090-4117-6, (2017), S. 816-820

https://doi.org/10.1109/ICASSP.2017.7952269
Kirchhof, Jan; Krieg, Fabian; Römer, Florian; Ihlow, Alexander; Osman, Ahmad; Del Galdo, Giovanni
Speeding up 3D SAFT for ultrasonic NDT by sparse deconvolution. - In: 2016 IEEE International Ultrasonics Symposium (IUS) : 18-21 Sept. 2016. - [Piscataway, NJ] : IEEE / IEEE International Ultrasonics Symposium (Tours) : 2016.09.18-21., ISBN 978-1-4673-9897-8, (2016), insges. 4 S.

http://dx.doi.org/10.1109/ULTSYM.2016.7728434
Rieche, Marie; Ihlow, Alexander; Heyn, Thomas; Pérez-Fontán, Fernando; Del Galdo, Giovanni
Land mobile satellite propagation characteristics from knife-edge diffraction modeling and hemispheric images. - In: 2015 9th European Conference on Antennas and Propagation (EuCAP 2015) / European Conference on Antennas and Propagation ; 9 (Lisbon) : 2015.04.13-17. : Lisbon, Portugal, 13 - 17 April 2015. - Piscataway, NJ : IEEE, (2015), S. 3346-3349
Rieche, Marie; Ihlow, Alexander; Arndt, Daniel; Pérez-Fontán, Fernando; Del Galdo, Giovanni
Modeling of the Land Mobile Satellite channel considering the terminal's driving direction. - In: International journal of antennas and propagation : IJAP. - New York, NY : Hindawi, ISSN 16875877, Bd. 2015Bd. 2015 (2015), Article ID 372124, insges. 21 S.
http://dx.doi.org/10.1155/2015/372124
König, Jonas; Ihlow, Alexander; Heuberger, Albert; Del Galdo, Giovanni
Diversity combining for cooperative satellite terminals in a moving convoy of vehicles. - In: 8th European Conference on Antennas and Propagation (EuCAP), 2014 : The Hague, Netherlands, 6 - 11 April 2014. - Piscataway, NJ : IEEE / European Conference on Antennas and Propagation ; 8 (The Hague) : 2014.04.06-11., ISBN 978-1-4799-2431-8, (2014), S. 3035-3039

http://dx.doi.org/10.1109/EuCAP.2014.6902467
Rieche, Marie; Arndt, Daniel; Ihlow, Alexander; Pérez-Fontán, Fernando; Del Galdo, Giovanni
Impact of driving direction on Land Mobile Satellite channel modeling. - In: 8th European Conference on Antennas and Propagation (EuCAP), 2014 : The Hague, Netherlands, 6 - 11 April 2014. - Piscataway, NJ : IEEE / European Conference on Antennas and Propagation ; 8 (The Hague) : 2014.04.06-11., ISBN 978-1-4799-2431-8, (2014), S. 2268-2271

http://dx.doi.org/10.1109/EuCAP.2014.6902266
König, Jonas; Ihlow, Alexander; Arndt, Daniel; Heuberger, Albert; Del Galdo, Giovanni
Measurement-based performance analysis of cooperative diversity for satellite terminals in a moving convoy. - In: IEEE 77th Vehicular Technology Conference (VTC Spring), 2013 : 2 - 5 June 2013, Dresden, Germany ; proceedings ; [including workshops]. - Piscataway, NJ : IEEE / IEEE Vehicular Technology Conference ; 77 (Dresden) : 2013.06.02-05., ISBN 978-1-4673-6336-5, (2013), insges. 5 S.

In this paper we discuss the impact of cooperative satellite diversity on the availability of the land mobile satellite (LMS) channel. By the use of multiple terminals the overall probability to encounter conditions where all terminals are in a bad channel state is reduced. This reduction depends on the number of terminals and the terminal distance. The results presented in this paper are completely based on the analysis of measurements. These were conducted for two geostationary satellites and four different environments using a single mobile satellite terminal. Thus, in order to virtually increase the number of terminals we rely on a convoy scenario using shifted versions of the data. Analyzing up to four cooperative terminals and different terminal distances a significant bad state reduction is already achieved for rather small distances.


http://dx.doi.org/10.1109/VTCSpring.2013.6692630
Schirmer, Christopher; Alsharef, Mohamed Alzarouk; Kotterman, Wim; Ihlow, Alexander; Del Galdo, Giovanni; Heuberger, Albert
High time-resolution spectrum occupancy model for testing of cognitive radio devices. - In: IEEE 24th International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC), 2013 : 8 - 11 Sept. 2013, London, United Kingdom. - Piscataway, NJ : IEEE / IEEE Annual International Symposium on Personal, Indoor, and Mobile Radio Communications ; 24 (London) : 2013.09.08-11., ISBN 978-1-4673-6233-7, (2013), S. 596-600

http://dx.doi.org/10.1109/PIMRC.2013.6666206
Rieche, Marie; Arndt, Daniel; Ihlow, Alexander; Del Galdo, Giovanni
Influence of driving direction on land mobile satellite channels. - In: IEEE International Symposium on Broadband Multimedia Systems and Broadcasting (BMSB), 2013 : 5 - 7 June 2013, London. - Piscataway, NJ : IEEE / IEEE International Symposium on Broadband Multimedia Systems and Broadcasting ; 8 (London) : 2013.06.05-07., ISBN 978-1-4673-6047-0, (2013), insges. 5 S.

http://dx.doi.org/10.1109/BMSB.2013.6621686
Rieche, Marie; Arndt, Daniel; Ihlow, Alexander; Del Galdo, Giovanni
State modeling of the land mobile satellite channel by an image-based approach. - In: 7th European Conference on Antennas and Propagation (EuCAP), 2013 : 8 - 12 April 2013, Gothenburg, Sweden. - Piscataway, NJ : IEEE / European Conference on Antennas and Propagation ; 7 (Gothenburg) : 2013.04.08-12., ISBN 978-1-4673-2187-7, (2013), S. 672-676

http://ieeexplore.ieee.org/xpl/articleDetails.jsp?tp=&arnumber=6546359
Arndt, Daniel; Ihlow, Alexander; Heyn, Thomas; Heuberger, Albert; Prieto-Cerdeira, Roberto; Eberlein, Ernst
State modelling of the land mobile propagation channel for dual-satellite systems. - In: EURASIP journal on wireless communications and networking : EURASIP JWCN. - Heidelberg : Springer, ISSN 16871499, (2012), 2012:228, insges. 21 S.
https://doi.org/10.1186/1687-1499-2012-228
Arndt, Daniel; Ihlow, Alexander; Heuberger, Albert; Eberlein, Ernst
State modelling of the land mobile propagation channel with multiple satellites. - In: International journal of antennas and propagation : IJAP. - New York, NY : Hindawi, ISSN 16875877, Bd. 2012Bd. 2012 (2012), Article ID 625374, insges. 15 S.
http://dx.doi.org/10.1155/2012/625374
König, Jonas; Arndt, Daniel; Ihlow, Alexander; Heuberger, Albert
Estimation of fading parameter correlation for modeling the land mobile satellite channel. - In: IEEE International Symposium on Broadband Multimedia Systems and Broadcasting (BMSB), 2012 : 27 - 29 June 2012, Seoul, South Korea. - Piscataway, NJ : IEEE / IEEE International Symposium on Broadband Multimedia Systems and Broadcasting (Seoul) : 2012.06.27-29., ISBN 978-1-4673-0293-7, (2012), insges. 5 S.

http://dx.doi.org/10.1109/BMSB.2012.6264304
Arndt, Daniel; Heyn, Thomas; König, Jonas; Ihlow, Alexander; Heuberger, Albert; Prieto-Cerdeira, Roberto; Eberlein, Ernst
Extended two-state narrowband LMS propagation model for S-band. - In: IEEE International Symposium on Broadband Multimedia Systems and Broadcasting (BMSB), 2012 : 27 - 29 June 2012, Seoul, South Korea. - Piscataway, NJ : IEEE / IEEE International Symposium on Broadband Multimedia Systems and Broadcasting (Seoul) : 2012.06.27-29., ISBN 978-1-4673-0293-7, (2012), insges. 6 S.

http://dx.doi.org/10.1109/BMSB.2012.6264301
Breiling, Marco; Heuberger, Albert; Eberlein, Ernst; Vargas, Aharon; Arndt, Daniel; Ihlow, Alexander
Choice of physical layer parameters for satellite broadcast. - In: Microelectronic systems : circuits, systems and applications ; [Festschrift for Prof. Dr.-Ing. Heinz Gerhäuser]. - Berlin [u.a.] : Springer, ISBN 9783642230707, (2011), S. 103-117

Arndt, Daniel; Ihlow, Alexander; Heuberger, Albert; Heyn, Thomas; Eberlein, Ernst
QoS prediction for mobile satellite broadcasting with angle diversity based on measurements. - In: IEEE International Symposium on Broadband Multimedia Systems and Broadcasting (BMSB), 2011 : 8 - 10 June 2011, Nuremberg, Germany. - Piscataway, NJ : IEEE / IEEE International Symposium on Broadband Multimedia Systems and Broadcasting ; 6 (Nuremberg) : 2011.06.08-10., ISBN 978-1-61284-121-2, (2011), insges. 8 S.

http://dx.doi.org/10.1109/BMSB.2011.5954885
Ihlow, Alexander; Arndt, Daniel; Topf, Felix; Rothaug, Christoph; Wittenberg, Thomas; Heuberger, Albert
Photogrammetric satellite service prediction - correlation of RF measurements and image data. - In: IEEE International Symposium on Broadband Multimedia Systems and Broadcasting (BMSB), 2011 : 8 - 10 June 2011, Nuremberg, Germany. - Piscataway, NJ : IEEE / IEEE International Symposium on Broadband Multimedia Systems and Broadcasting ; 6 (Nuremberg) : 2011.06.08-10., ISBN 978-1-61284-121-2, (2011), insges. 6 S.

http://dx.doi.org/10.1109/BMSB.2011.5954884
Arndt, Daniel; Ihlow, Alexander; Heuberger, Albert; Eberlein, Ernst
Measurement-based evaluation of antenna- and time diversity for mobile satellite systems. - In: Proceedings of the 2011 11th International Conference on Telecommunications (ConTEL) : 15 - 17 June 2011, Graz, Austria ; co-located with International Workshop of the EU COST Action IC 0802 - Propagation Tools and Data for Integrated Telecom, Navigation and Earth Observation Systems. - Piscataway, NJ : IEEE / International Conference on Telecommunications ; 11 (Graz, Austria) : 2011.06.15-17., ISBN 978-1-61284-169-4, (2011), S. 457-464

http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=5969973
Arndt, Daniel; Ihlow, Alexander; Heuberger, Albert; Eberlein, Ernst
Antenna diversity for mobile satellite applications: performance evaluation based on measurements. - In: Proceedings of the 5th European Conference on Antennas and Propagation (EUCAP 2011) / European Conference on Antennas and Propagation ; 5 (Rome) : 2011.04.11-15. : Rome, Italy, 11 - 15 April 2011. - Piscataway, NJ : IEEE, (2011), S. 3729-3733
Ihlow, Alexander; Held, Christian; Rothaug, Christoph; Dach, Claudia; Wittenberg, Thomas; Steckhan, Dirk
Evaluation of expectation maximization for the segmentation of cervical cell nuclei. - In: Bildverarbeitung für die Medizin 2011 / Workshop Bildverarbeitung für die Medizin (Lübeck) : 2011.03.20-22. : Algorithmen, Systeme, Anwendungen ; Proceedings des Workshops vom 20. - 22. März 2011 in Lübeck. - Berlin [u.a.] : Springer Berlin, ISBN 978-3-642-19334-7, (2011), S. 139-143

Mehnert, Markus; Al-Azab, Mostafa; Ihlow, Alexander; Heuberger, Albert; Blau, Kurt
Noise measurements for mobile satellite applications. - In: 11. Workshop Digital Broadcasting / Workshop Digital Broadcasting ; 11 (Erlangen) : 2010.09.15-16. - Stuttgart : Fraunhofer Verl., ISBN 978-3-8396-0178-5, (2010), S. 55-60

Heitbrink, Dietmar; Ihlow, Alexander; Heuberger, Albert
Low frequency broadcasting revisited - measuring propagation attenuation into buildings. - In: 11. Workshop Digital Broadcasting / Workshop Digital Broadcasting ; 11 (Erlangen) : 2010.09.15-16. - Stuttgart : Fraunhofer Verl., ISBN 978-3-8396-0178-5, (2010), S. 67-71

Arndt, Daniel; Ihlow, Alexander; Heuberger, Albert; Heyn, Thomas; Eberlein, Ernst; Prieto-Cerdeira, Roberto
Mobile satellite broadcasting with angle diversity - performance evaluation based on measurements. - In: IEEE International Symposium on Broadband Multimedia Systems and Broadcasting (BMSB), 2010 : 24 - 26 March 2010, Shanghai, China. - Piscataway, NJ : IEEE / IEEE International Symposium on Broadband Multimedia Systems and Broadcasting (Shanghai) : 2010.03.24-26., ISBN 978-1-4244-4461-8, (2010), insges. 8 S.

http://dx.doi.org/10.1109/ISBMSB.2010.5463145
Arndt, Daniel; Ihlow, Alexander; Heuberger, Albert; Heyn, Thomas; Eberlein, Ernst
Land mobile satellite channel characteristics from the MiLADY project. - In: 10. Workshop Digital Broadcasting : September 16 - 17, 2009 ; Proceedings. - Stuttgart : Fraunhofer-Verl., ISBN 978-3-8396-0054-2, (2009), S. 49-55

Ihlow, Alexander; Heuberger, Albert
Sky detection in fisheye images for photogrammetric analysis of the land mobile satellite channel. - In: 10. Workshop Digital Broadcasting : September 16 - 17, 2009 ; Proceedings. - Stuttgart : Fraunhofer-Verl., ISBN 978-3-8396-0054-2, (2009), S. 56-60

Ihlow, Alexander; Schweizer, Patrick; Seiffert, Udo
A high-throughput screening system for barley/powdery mildew interactions based on automated analysis of light micrographs. - In: BMC plant biology. - London : BioMed Central, ISSN 14712229, Bd. 82008, 8:6, (23. Jan.), insges. 9 S.

Background: To find candidate genes that potentially influence the susceptibility or resistance of crop plants to powdery mildew fungi, an assay system based on transient-induced gene silencing (TIGS) as well as transient over-expression in single epidermal cells of barley has been developed. However, this system relies on quantitative microscopic analysis of the barley/powdery mildew interaction and will only become a high-throughput tool of phenomics upon automation of the most time-consuming steps. - Results: We have developed a high-throughput screening system based on a motorized microscope which evaluates the specimens fully automatically. A large-scale double-blind verification of the system showed an excellent agreement of manual and automated analysis and proved the system to work dependably. Furthermore, in a series of bombardment experiments an RNAi construct targeting the Mlo gene was included, which is expected to phenocopy resistance mediated by recessive loss-of-function alleles such as mlo5. In most cases, the automated analysis system recorded a shift towards resistance upon RNAi of Mlo, thus providing proof of concept for its usefulness in detecting gene-target effects. - Conclusion: Besides saving labor and enabling a screening of thousands of candidate genes, this system offers continuous operation of expensive laboratory equipment and provides a less subjective analysis as well as a complete and enduring documentation of the experimental raw data in terms of digital images. In general, it proves the concept of enabling available microscope hardware to handle challenging screening tasks fully automatically.


http://dx.doi.org/10.1186/1471-2229-8-6
Tautenhahn, Ralf; Ihlow, Alexander; Seiffert, Udo
Adaptive feature selection for classification of microscope images. - Online-Ressource (PDF-Datei: 8 S., 289,1 KB)
Druck- und Online-Ausg.: Fuzzy logic and applications : 6th international workshop, WILF 2005, Crema, Italy, September 15 - 17, 2005 ; revised selected papers / Isabelle Bloch ... (eds.). - Berlin [u.a.] : Springer, 2006. - S. 215-222. - Print ISBN 978-3-540-32529-1; Online ISBN 978-3-540-32530-7. - (Lecture notes in computer science ; 3849)

For high-throughput screening of genetically modified plant cells, a system for the automatic analysis of huge collections of microscope images is needed to decide whether the cells are infected with fungi or not. To study the potential of feature based classification for this application, we compare different classifiers (kNN, SVM, MLP, LVQ) combined with several feature reduction techniques (PCA, LDA, Mutual Information, Fisher Discriminant Ratio, Recursive Feature Elimination). We achieve a significantly higher classification accuracy using a reduced feature vector instead of the full length feature vector.


http://www.db-thueringen.de/servlets/DocumentServlet?id=23764
Ihlow, Alexander; Seiffert, Udo
Adaptive color spaces based on multivariate Gaussian distributions for color image segmentation. - Online-Ressource (PDF-Datei: 11 S., 4,45 MB)
Digitalisat der Druckausg.: 12. Workshop Farbbildverarbeitung : 5. - 6. Oktober 2006, Ilmenau / Zentrum für Bild- und Signalverarbeitung e. V. Ilmenau (Hrsg.). [In Zs.-Arb. mit German Color Group. Tagungsvorsitz: Karl-Heinz Franke]. - Ilmenau, 2004. - S. 86-96. - (Schriftenreihe des Zentrums für Bild- und Signalverarbeitung e. V. Ilmenau)

We formulate an adaptive color space for segmenting all image into the two classes "object of interest" and "background" by using well-established methods from statistical pattern recognition. Both classes are modeled by a multivariate Gaussian distribution whose actual parameters are estimated via the Expectation Maximization (EM) algorithm. The output grayscale feature image is derived as the distance of each pixel's color to the decision boundary which is shaped bewteen the two class models. Based on this feature image, which provides a maximum discriminatory power with respect to the underlying model assumptions, the actual segmentation can be performed with appropriate methods from grayscale image processing. This adaptive color space is a practical tool for homogeneously colored scenes, as they appear, e.g., in microscopic images of biotechnical fundamental research.


http://nbn-resolving.de/urn:nbn:de:gbv:ilm1-2014300035
Schweizer, Patrick; Ihlow, Alexander; Seiffert, Udo
Hochdurchsatz-Phänomanalyse in Getreide : auf der Jagd nach der Funktion pflanzlicher Gene bei Pathogenbefall. - In: GenomXPress. - Berlin : DHGP, (2006), 2, S. 16-19
http://www.db-thueringen.de/servlets/DocumentServlet?id=23766
Ihlow, Alexander
Ein Hochdurchsatz-Screeningsystem zur Objekterkennung in Mikroskop-Farbbildern im Rahmen der Analyse pflanzlicher Pathogenresistenz. - Online-Ressource (PDF-Datei: 159 S., 37,0 MB)
Magdeburg : Univ., Fak. für Elektrotechnik und Informationstechnik, Diss., 2006

Color image processing, pattern recognition, machine vision, application


http://nbn-resolving.de/urn:nbn:de:101:1-201010181150
Ihlow, Alexander; Seiffert, Udo
Automating microscope colour image analysis using the Expectation Maximisation algorithm. - Online-Ressource (PDF-Datei: 8 S., 716,6 KB)
Druck- und Online-Ausg.: Pattern recognition : 26th DAGM Symposium, Tübingen, Germany, August 30 - September 1, 2004 ; proceedings / Carl Edward Rasmussen ... (ed.). - Berlin [u.a.] : Springer, 2004. - S. 536-543. - Print ISBN 978-3-540-22945-2; Online ISBN 978-3-540-28649-3. - (Lecture notes in computer science ; 3175)

Dyed barley cells in microscope colour images of biological experiments are analysed for the occurrence of haustoria of the powdery mildew fungus by a fully automated screening system. The region of interest in the images is found by applying Canny's edge detector to the hue channel of the HSV colour space. Potential haustoria regions are extracted in RGB colour space by an adaptive Gaussian mixture classifier based on the Expectation Maximisation (EM) algorithm. Since the classes cell and haustorium are at very close quarters, their correct separation is a crucial part and needs a constraining mechanism which ties the EM algorithm to its initialisation data to prevent a too large deviation from it.


http://www.db-thueringen.de/servlets/DocumentServlet?id=23760
Ihlow, Alexander; Seiffert, Udo
Haustoria segmentation in microscope colour images of barley cells. - Online-Ressource (PDF-Datei: 8 S., 3,64 MB)
Digitalisat der Druckausg.: 10. Workshop Farbbildverarbeitung : 7. - 8. Oktober 2004, Koblenz / Detlev Droege; Dietrich Paulus. - Tönning [u.a.] : Der Andere Verl., 2004. - S. 119 - 126

Dyed barley cells in microscope colour images of biological experiments are analysed for the occurrence of haustoria of the powdery mildew fungus by a fully automated screening system. The region of interest in the images is found by applying Canny's edge detector to the hue channel of the HSV colour space. For the segmentation of potential haustoria within the dyed cells, two different methods are considered: A clustering in RGB colour space using the Expectation Maximisation (EM) algorithm, and morphological contrast enhancement of the colour image with subsequent hysteresis thresholding in the saturation channel of the enhanced images. The second approach seems to be more viable because of its robustness and more promising results.


http://nbn-resolving.de/urn:nbn:de:gbv:ilm1-2014300021
Ihlow, Alexander; Seiffert, Udo
Microscope color image segmentation for resistance analysis of barley cells against powdery mildew. - Online-Ressource (PDF-Datei: 8 S., 1,13 MB)
CD-ROM-Ausg.: 9. Workshop Farbbildverarbeitung : 08. - 09. Oktober 2003, Ostfildern-Nellingen ; Autorenbeiträge / [Zentrum für Bild- und Signalverarbeitung e. V. Ilmenau (Hrsg.) Organisation: Technische Universität Ilmenau, Zentrum für Bild- und Signalverarbeitung e. V. Ilmenau]. - Ilmenau : Techn. Univ., Koordinierungsbüro Bildverarbeitung, Mustererkennung und Technische Sehsysteme, 2003. - insges. 8 S. - (Schriftenreihe des ZBS, Zentrum für Bild- und Signalverarbeitung e.V. Ilmenau ; 2003,3)

This paper addresses applied image segmentation techniques for the detection of dyed objects (transgenic barley cells) in microscope color images. It is shown on exemplary image data that edge detection with Canny's algorithm applied to the hue channel of the HSV color space outperforms both multidimensional edge detection in RGB space as well as color-based pixel classification. This provides a firm basis for a fully automatic high-throughput analysis tool.


http://nbn-resolving.de/urn:nbn:de:gbv:ilm1-2014300013
Del Galdo, Giovanni; Haardt, Martin; Hennhöfer, Marko; Ihlow, Alexander; Thomä, Reiner
Realistic MIMO simulations based on multidimensional channel-sounding measurements. - In: / General assembly. International Union of Radio Science. (URSI) ; 27 (Maastricht) : 2002.08.17-24.
Kuhwald , Thomas; Boche, Holger; Kortke, Andreas; Ihlow, Alexander
Optimum constrained beamforming using linear microstrip-patch antenna arrays. - In: / International Symposium on Antennas and Propagation (Fukuoka) : 2000.08.21-25., (2000), S. 915-918