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Your search keyword '"Matikainen, L."' showing total 13 results
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13 results on '"Matikainen, L."'

1. Kestävä ja uudistuva yhteiskunta:White Paper

Author

Aarikka-Stenroos, Leena, Blomberg, A., Heikkinen, A., Jokinen, A., Kaipainen, J., Kokko, M., Kujala, J., Leinonen, H., Marjamaa, M., Pohls, E., Tapaninaho, R., Sihvo-Matikainen, L., Henttonen, K, Lehtimäki, H., Piispanen, V.-V., Teerikangas, S., Valkjärvi, M., Mäkelä, M., Onkila, T., Harlin, Ali, Kataja, Kirsi, Sundqvist-Andberg, Henna, Åkerman, Maria, Bor, Sanne, Hakala, H., Snellman, K., Hämäläinen, S., Varho, V., Viitala, E.-J., Leinonen, I., Sonck-Rautio, Kirsi, Kauppi, S, Jalonen, K., Malho, M., Alajärvi, L., Miettinen, M., Ahokas, Ira, Hurmerinta, L., Lamberg, J., Silvonen, E., Tapio, P., Tuominen, Anu, Hakkarainen, K., Korhonen, T., Lavonen, K., Reinius, H., Salmela-Aro, K., Salo, L., Vinni-Laakso, J., Hannula-Sormunen, M., Lehtinen, E., Honkatukia, P., Juusola, H., Kallio, J., Varsaluoma, Jari, Ågren, S., Mietola, R., Suni, A., Mustalahti, I., Tokola, N., Kokko, S., Vasankari, T., Paloniemi, R., Upadyaya, K., Ritschkoff, Anne-Christine, and Simola, Kaisa

Abstract

Tämä strategisen tutkimuksen neuvoston rahoittaman Kestävän kasvun avaimet (GROWTH) -ohjelman julkaisu tuottaa tutkimukseen perustuvia näkökulmia ja ratkaisun avaimia päätöksentekijöiden hyödynnettäväksi tukemaan oikeudenmukaista siirtymää kohti kestävää ja hyvinvoivaa yhteiskuntaa. Nämä ratkaisun avaimet korostavat uudentyyppistä arvonluontia, korkeatasoista koulutusta sekä sukupolvien välisen oikeudenmukaisuuden toteutumista kestävyysmurroksessa.

Published
2022
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4. Accuracy of 3D city models: EuroSDR comparison

Author

Kaartinen, H., Hyyppa, J., Gülch, E., Vosselman, G., Hyyppä, H., Matikainen, L., Hofmann, A.D., Mäder, U., Persson, A., Söderman, U., Elmqvist, M., Ruiz, A., Dragoja, M., Flamanc, D., Maillet, G., Kersten, T., Carl, J., Hau, R., Wild, E., Frederiksen, L., Holmgaard, J., Vester, K., Brenner, C., Department of Earth Observation Science, UT-I-ITC-ACQUAL, and Faculty of Geo-Information Science and Earth Observation

Subjects
Point cloud, EOS, Photogrammetry, Interquartile range, Building outline, ADLIB-ART-1278, Laser scanning, Building extraction, Accuracy
Abstract

The paper focuses on comparing accuracies obtained with photogrammetry and laser scanning in building extraction and partly compares results obtained with various methods. The objective of the EuroSDR Building Extraction comparison was to evaluate the quality, accuracy, feasibility and economical aspects of semi-automatic building extraction based on photogrammetric techniques with the emphasis on commercial and/or operative systems, semi-automatic and automatic building extraction techniques based on high density laser scanner data and semi-automatic and automatic building extraction techniques based on integration of laser scanner data and aerial images (hybrid technique). The project consists of three test sites by Finnish Geodetic Institute (FGI), namely Senaatti, Hermanni and Espoonlahti and one test site by Institut Geographique National (IGN), namely Amiens. For each test site following data was provided to the partners: aerial images, camera calibration and image orientation information, ground control point coordinates and jpg images of point locations (not for Amiens), laser scanner data and cadastral map vectors of selected buildings. Participants were requested to create the vectors of 3D city models. 3D-models were obtained from 11 participants. Paper confirms with experiments that laser scanning is more suitable in deriving building heights, extracting planar roof faces and ridges of the roof whereas the photogrammetry and aerial images are more suitable in building outline and length determination. CyberCity, Stuttgart and TerraScan (performed by ICC) solutions provided the highest accuracy. There seemed to be a higher variation in the quality of other models depending on test site or remotely sensed information.

Published
2005

10. Ultrasonic system for the detection of transient liquid/gas interfaces using the pulse-echo technique.

Author

Matikainen, L., Irons, G. A., Morala, E., and Chang, J-S.

Subjects
*ULTRASONIC testing, *LIQUIDS, *COAL gas, *TRANSDUCERS
Abstract

An ultrasonic method has been chosen to examine liquid/gas interfacial areas in closed systems. Although commercial equipment was used for the transducer and ultrasonic analyzer, commercial transient memory devices were inadequate. Consequently, a real-time data analysis and transient memory (DATM) unit was designed and constructed. A series of flight times for a succession of 1024 signals are calculated and recorded in the transient memory. The system clock operates at 10 MHz and increments a 12-bit binary counter. The counter is capable of measuring return signal times as long as 2[sup 12] µs (4.096 ms) with a 1-µs resolution. The data are available as analog voltages for display on an oscilloscope or the digital data may be directly transferred to a microcomputer for analysis, display, or archival storage. The DATM device was successfully applied, collecting data for the analysis of rising bubbles in metallurgical systems and two-phase flow in horizontal tubes. [ABSTRACT FROM AUTHOR]

Published
1986
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12. Accuracy of 3D city models: EuroSDR comparison

Author

Kaartinen, H., Juha Hyyppä, Gülch, E., Vosselman, G., Hyyppä, H., Matikainen, L., Hofmann, A. D., Mäder, U., Persson, Å, Söderman, U., Elmqvist, M., Ruiz, A., Dragoja, M., Flamanc, D., Maillet, G., Kersten, T., Carl, J., Hau, R., Wild, E., Frederiksen, L., Holmgaard, J., and Vester, K.

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