INTEGRATION OF POINT CLOUDS ORIGINATED FROM LASER SCANER AND PHOTOGRAMMETRIC IMAGES FOR VISUALIZATION OF COMPLEX DETAILS OF HISTORICAL BUILDINGS
Three-dimensional (3D) models of historical buildings are created for documentation and virtual realization of them. Laser scanning and photogrammetry are extensively used to perform for these aims. The selection of the method that will be used in threedimensional modelling study depends on the scal...
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2015-02-01
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| Series: | The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences |
| Online Access: | http://www.int-arch-photogramm-remote-sens-spatial-inf-sci.net/XL-5-W4/431/2015/isprsarchives-XL-5-W4-431-2015.pdf |
| Summary: | Three-dimensional (3D) models of historical buildings are created for documentation and virtual realization of them. Laser scanning
and photogrammetry are extensively used to perform for these aims. The selection of the method that will be used in threedimensional
modelling study depends on the scale and shape of the object, and also applicability of the method. Laser scanners are
high cost instruments. However, the cameras are low cost instruments. The off-the-shelf cameras are used for taking the
photogrammetric images. The camera is imaging the object details by carrying on hand while the laser scanner makes ground based
measurement. Laser scanner collect high density spatial data in a short time from the measurement area. On the other hand, image
based 3D (IB3D) measurement uses images to create 3D point cloud data. The image matching and the creation of the point cloud
can be done automatically.
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Historical buildings include more complex details. Thus, all details cannot be measured by terrestrial laser scanner (TLS) due to the
blocking the details with each others. Especially, the artefacts which have complex shapes cannot be measured in full details. They
cause occlusion on the point cloud model. However it is possible to record photogrammetric images and creation IB3D point cloud
for these areas. Thus the occlusion free 3D model is created by the integration of point clouds originated from the TLS and
photogrammetric images.
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In this study, usability of laser scanning in conjunction with image based modelling for creation occlusion free three-dimensional
point cloud model of historical building was evaluated. The IB3D point cloud was created in the areas that could not been measured
by TLS. Then laser scanning and IB3D point clouds were integrated in the common coordinate system. The registration point
clouds were performed with the iterative closest point (ICP) and georeferencing methods. Accuracy of the registration was evaluated
by convergency and its standard deviations for the ICP and residuals on the control points for the georeferencing method. |
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| ISSN: | 1682-1750 2194-9034 |