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Title: High-resolution imaging for e-heritage
Authors: LU ZHENG
Keywords: High resolution, 3D, surface from normal, photometric stereo, hybrid camera\
Issue Date: 6-Sep-2011
Citation: LU ZHENG (2011-09-06). High-resolution imaging for e-heritage. ScholarBank@NUS Repository.
Abstract: In the context of imaging for e-heritage, several challenges manifest, such as increased time and e ort of capturing and processing data, accumulation of errors, and shallow depth-of-field. These challenges are mainly originated from the high-resolution imaging requirement and restricted working environments commonly found at cultural heritage sites. This thesis addresses problems in high-resolution 2D and 3D imaging for e-heritage under restricted working environments. In particular, we first discuss our feasibility study on imaging Buddhist art in a UNESCO cultural heritage site using a large-format digital camera. We describe lessons learned from this field study as well as remaining challenges inherent to such projects. We then devise a framework that can capture high-resolution 3D data that combines high-resolution imaging with low-resolution 3D data. Our high-resolution 3D results show much finer surface details even compared with the result produced by a state-of-the-art laser scanner. To our best knowledge, the proposed framework can produce the highest surface sampling rate demonstrated to date. Last, we introduce a method that can produce more accurate surface normals in the situation of shallow depth-of-field and show how we can improve the reconstructed 3D surface without additional setup. Our synthetic and real world experiment results show improvement to both surface normals and 3D reconstruction.
Appears in Collections:Ph.D Theses (Open)

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