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Post Processing of Reflectance Transform Imaging for Isolation of Surface Impressions

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An important aspect in paper conservation is identification of the source of a paper used for a work of art. Identifying threedimensional characteristics such as laid lines, chain lines, and watermarks made in the manufacturing process of papers can aid in this process. Reflectance Transform Imaging (RTI) has become a point of interest[1], as it is particularly useful when the primary support is lined with secondary or even tertiary supports of canvas, boards, or other papers with different textures that would obstruct the use of transmitted light or X-ray imaging. Working with the surface normal and depth map generated from a 3D model based on the RTI data, we use frequency separation methods and Fast Fourier Transforms to isolate specific threedimensional features from the images.
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Document Type: Research Article

Publication date: April 1, 2016

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  • The IS&T (digital) Archiving Conference offers a unique opportunity for imaging scientists and those working in the cultural heritage community (curators, archivists, librarians, photographers etc) from around the world to come together to discuss the most pressing issues related to the digital preservation and stewardship of hardcopy, and other cultural heritage documents and objects. Authors come from museums, archives, libraries, government institutions, industry and academia. Cutting edge topics related to multispectral and 3D imaging, as well as best practices for workflow, sharing, standards, and asset/collection management and dissemination are explored in papers presented at this annual, international event.

    Please note: For purposes of its Digital Library content, IS&T defines Open Access as papers that will be downloadable in their entirety for free in pertuity. Copyright restrictions on papers vary; see individual paper for details.

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