// +author:e ahokas +author:ahokas 
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{userid:"lauri.markelin", "refid":"3","attachment":"","articletype":"article","sectionheading":"","title":"Theoretical and empirical evaluation of geometric performance of multi-head large format photogrammetric sensors","year":"2006","author":"Honkavaara, E., Jaakkola, J., Markelin, L., Nurminen, K., and E. Ahokas","journal":"International Archives of Photogrammetry, Remote Sensing and Spatial Information Sciences","volume":"36","number":"A1","pages":"6p","month":"","doi":"","pubmed":"","pdflink":"http:\/\/isprs.free.fr\/documents\/Papers\/T05-19.pdf","urllink":"","abstract":"","note":"","tags":"Accuracy, Calibration, Camera, Distortion, Geometric, Orientation, Simulation"}
,

{userid:"lauri.markelin", "refid":"5","attachment":"","articletype":"inproceedings","sectionheading":"","title":"Radiometric evaluation of digital aerial cameras","year":"2006","author":"Markelin, L., Honkavaara, E., Peltoniemi, J., Suomalainen, J., and E. Ahokas","booktitle":"International Archives of Photogrammetry, Remote Sensing and Spatial Information Sciences, 36(B1)","editor":"","pages":"","organization":"ISPRS Commission I","address":"","publisher":"","doi":"","pubmed":"","pdflink":"http:\/\/isprs.free.fr\/documents\/Papers\/T01-02.pdf","urllink":"","abstract":"","note":"","tags":"Aerial Digital Cameras, Radiometry, Quality, Targets, BRDF, calibration"}
,

{userid:"lauri.markelin", "refid":"7","repocollections":"","attachment":"","_thumb":"","articletype":"inproceedings","sectionheading":"","title":"Radiometric quality comparison of UltraCamD and analog camera","year":"2005","author":"Markelin, L., Ahokas, E., Honkavaara, E., Kukko, A. and J. Peltoniemi","booktitle":"Proceedings of ISPRS Hannover Workshop 2005 \"High-Resolution Earth Imaging for Geospatial Information\"","editor":"","pages":"","organization":"ISPRS Commission I","address":"","publisher":"","doi":"","pubmed":"","pdflink":"http:\/\/www.isprs.org\/publications\/related\/hannover05\/paper\/099-markelin.pdf","urllink":"","abstract":"","note":"","tags":"Aerial, Analog, Digital, Camera, Comparison, Radiometric, Quality, Film"}
,

{userid:"lauri.markelin", "refid":"19","attachment":"","articletype":"inproceedings","sectionheading":"","title":"Calibrating digital photogrammetric airborne imaging systems in a test field","year":"2008","author":"E Honkavaara, L Markelin, E Ahokas, R Kuittinen, J Peltoniemi","booktitle":"International Archives of Photogrammetry, Remote Sensing and Spatial Information Sciences, 37(B1)  ","editor":"CHEN Jun, JIANG Jie, Alain BAUDOIN","pages":"6p","organization":"ISPRS Commission I","address":"","publisher":"","doi":"","pubmed":"","pdflink":"http:\/\/www.isprs.org\/congresses\/beijing2008\/proceedings\/1_pdf\/94.pdf","urllink":"","abstract":"","note":"","tags":"accuracy analysis, digital photogrammetry, geometry, radiometry, resolution, sensor calibration"}
,

{userid:"lauri.markelin", "refid":22,"attachment":"","_thumb":"","articletype":"inproceedings","sectionheading":"","title":"An improved approach for automatic detection of changes in buildings","year":"2009","author":"Matikainen L., Hyypp\u00e4, J., Ahokas, E., Markelin, L., H. Kaartinen","booktitle":"International Archives of Photogrammetry, Remote Sensing and Spatial Information Sciences, 38 (3 \/ W8)","editor":"F. Bretar, M. Pierrot-Deseilligny, G. Vosselman","pages":"61-67,","organization":"ISPRS  WG III\/2 WG I\/2 WG V\/3 WG VII\/7","address":"","publisher":"","doi":"","pubmed":"","pdflink":"http:\/\/www.isprs.org\/proceedings\/XXXVIII\/3-W8\/cd_start_laserscanning.pdf","urllink":"","abstract":"","note":"","tags":"Building, Change Detection, Updating, Mapping, Automation, Laser scanning, Aerial image"}
,

{userid:"lauri.markelin", "refid":"8","repocollections":"","attachment":"","_thumb":"","articletype":"techreport","sectionheading":"","title":"Digitaalisten ilmakuvien laatumittarit - Quality indicators for digital aerial imagery","year":"2004","author":"Honkavaara, E., Markelin, L., Jaakkola, J., Ahokas, E., Hyypp\u00e4, J. and H. Kaartinen","institution":"","series":"Final report of a project funded by Ministry of Agriculture and Forestry","number":"","address":"","doi":"","pubmed":"","pdflink":"","urllink":"","abstract":"","note":"","tags":"Spatial resolution, histogram, quality, MTF, radiometry, tonal adjustement"}
,

{userid:"lauri.markelin", "refid":"32","repocollections":"","attachment":"","_thumb":"","articletype":"techreport","sectionheading":"","title":"Kaukokartoituspohjaisten tuotantotekniikoiden laadun spesifiointi ja laatustandardit - Quality specification and quality standards of remote sensing based production methods","year":"2006","author":"Honkavaara, E., Markelin, L., Jaakkola, J., Ahokas, E., Hyypp\u00e4, J., Oksanen, J.,","institution":"","series":"Final report of a project funded by Ministry of Agriculture and Forestry","number":"","address":"","doi":"","pubmed":"","pdflink":"","urllink":"","abstract":"","note":"","tags":""}
,

{userid:"lauri.markelin", "refid":"23","repocollections":"","attachment":"","_thumb":"","articletype":"article","sectionheading":"","title":" Automatic Detection of Buildings and Changes in Buildings for Updating of Maps","year":"2010","author":"L Matikainen, J Hyypp\u00e4, E Ahokas, L Markelin, H Kaartinen","journal":"Remote Sensing","volume":"2","number":"5","pages":"1217-1248","month":"","doi":"10.3390\/rs2051217","pubmed":"","pdflink":"http:\/\/www.mdpi.com\/2072-4292\/2\/5\/1217\/pdf","urllink":"http:\/\/www.mdpi.com\/2072-4292\/2\/5\/1217\/","abstract":"There is currently high interest in developing automated methods to assist the updating of map databases. This study presents methods for automatic detection of buildings and changes in buildings from airborne laser scanner and digital aerial image data and shows the potential usefulness of the methods with thorough experiments in a 5 km2  suburban study area. 96% of buildings larger than 60 m2 were correctly detected in the building detection. The completeness and correctness of the change detection for buildings larger than 60 m2  were about 85% (including five classes). Most of the errors occurred in small or otherwise problematic buildings.","note":"","tags":" building, change detection, updating; mapping, automation, laser scanning, aerial image"}
,

{userid:"lauri.markelin", "refid":"1","repocollections":"","attachment":"","_thumb":"","articletype":"article","sectionheading":"","title":"Geometric test field calibration of digital photogrammetric sensors","year":"2006","author":"Honkavaara, E., Ahokas, E., Hyypp\u00e4, J., Jaakkola, J., Kaartinen, H., Kuittinen, R., Markelin, L., and K. Nurminen","journal":"ISPRS Journal of Photogrammetry and Remote Sensing, Special Issue on Digital Photogrammetric Cameras","volume":"60","number":"6","pages":"387-399","month":"","doi":"doi:10.1016\/j.isprsjprs.2006.04.003 ","pubmed":"","pdflink":"","urllink":"http:\/\/dx.doi.org\/10.1016\/j.isprsjprs.2006.04.003","abstract":"","note":"","tags":"accuracy,aerial, Calibration, camera, distortion, geometric, orientation"}
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{userid:"lauri.markelin", "refid":"4","attachment":"","articletype":"inproceedings","sectionheading":"","title":"Complete photogrammetric system calibration and evaluation in the Sj\u00f6kulla test field case study with DMC","year":"2006","author":"Honkavaara, E., Jaakkola, J., Markelin, L., Peltoniemi, J., Ahokas, E., and S. Becker","booktitle":"Proceedings of EuroSDR Commission I and ISPRS Working Group 1\/3 Workshop EuroCOW 2006","editor":"","pages":"","organization":"","address":"","publisher":"","doi":"","pubmed":"","pdflink":"http:\/\/www.isprs.org\/commission1\/euroCOW06\/euroCOW06_files\/papers\/eurocow_eijahonkavaara.pdf","urllink":"","abstract":"","note":"","tags":"BRDF, calibration, geometry, MTF, radiometry, spatial resolution"}
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