TY - JOUR
T1 - Parallel processing of airborne laser scanning data using a hybrid model based on MPI and OpenMP
AU - Han, Soohee
AU - Park, Ilsuk
AU - Heo, Joon
PY - 2012/4
Y1 - 2012/4
N2 - In the present study, a parallel processing method running on a multi-core PC-Cluster is introduced to produce digital surface model (DSM) and digital terrain model (DTM) from huge airborne laser scanning data. A hybrid model using both message passing interface (MPI) and OpenMP was devised by revising a conventional MPI model which utilizes only MPI, and tested on a multi-core PC-Cluster for performance validation. In the results, the hybrid model has not shown better performances in the interpolation process to produce DSM, but the overall performance has turned out to be better by the help of reduced MPI calls. Additionally, scheduling function of OpenMP has revealed its ability to enhance the performance by controlling inequal overloads charged on cores induced by irregular distribution of airborne laser scanning data.
AB - In the present study, a parallel processing method running on a multi-core PC-Cluster is introduced to produce digital surface model (DSM) and digital terrain model (DTM) from huge airborne laser scanning data. A hybrid model using both message passing interface (MPI) and OpenMP was devised by revising a conventional MPI model which utilizes only MPI, and tested on a multi-core PC-Cluster for performance validation. In the results, the hybrid model has not shown better performances in the interpolation process to produce DSM, but the overall performance has turned out to be better by the help of reduced MPI calls. Additionally, scheduling function of OpenMP has revealed its ability to enhance the performance by controlling inequal overloads charged on cores induced by irregular distribution of airborne laser scanning data.
UR - http://www.scopus.com/inward/record.url?scp=84868099642&partnerID=8YFLogxK
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U2 - 10.7848/ksgpc.2012.30.2.135
DO - 10.7848/ksgpc.2012.30.2.135
M3 - Article
AN - SCOPUS:84868099642
SN - 1598-4850
VL - 30
SP - 135
EP - 142
JO - Journal of the Korean Society of Surveying Geodesy Photogrammetry and Cartography
JF - Journal of the Korean Society of Surveying Geodesy Photogrammetry and Cartography
IS - 2
ER -