Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XXXIX-B5, 109-114, 2012
http://www.int-arch-photogramm-remote-sens-spatial-inf-sci.net/XXXIX-B5/109/2012/
doi:10.5194/isprsarchives-XXXIX-B5-109-2012
© Author(s) 2012. This work is distributed
under the Creative Commons Attribution 3.0 License.
 
27 Jul 2012
CONSERVATION MONITORING OF A HERITAGE CEILING BY PHOTOMETRIC STEREO
L. MacDonald1, I. Gibb2, and S. Robson1 1Photogrammetry, 3D Imaging and Metrology Research Centre, University College London WC1E 6BT, UK
2Conservation Collection Care, Hampton Court Palace, Historic Royal Palaces, Surrey KT8 9AU, UK
Keywords: Architecture, conservation, monitoring, camera, imaging, reconstruction Abstract. Photographic survey techniques were employed to monitor the condition of the paintwork on the ceiling of the Queen's Staircase at Hampton Court Palace. Illumination was provided by a flash, mounted on an 8 metre telescopic mast, raised to approximately 60 cm below the ceiling, with images were taken from a fixed camera position on the floor of the landing at a range of 6.5 m. The photometric stereo method was applied to images from ten lamp positions, to calculate surface normals and a depth map. Cross-sections at the estimated surface resolution of 7.7 pixels/mm, achieved a depth (Z axis) resolution of approximately 100 microns.
Conference paper (PDF, 1178 KB)


Citation: MacDonald, L., Gibb, I., and Robson, S.: CONSERVATION MONITORING OF A HERITAGE CEILING BY PHOTOMETRIC STEREO, Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XXXIX-B5, 109-114, doi:10.5194/isprsarchives-XXXIX-B5-109-2012, 2012.

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