“Dynamic Shading Enhancement for Reflectance Transformation Imaging”

About This Publication

Authors	Gianpaolo Palma, Massimiliano Corsini, Paolo Cignoni, Roberto Scopigno, Mark Mudge
Published in	ACM Journal on Computing and Cultural Heritage (JOCCH), Volume 3 Issue 2
Publication Date	September 2010
How to get the paper	Buy and download from ACM Digital Library

Abstract

In this paper, we propose a set of dynamic shading enhancement techniques for improving the perception of details, features, and overall shape characteristics from images created with Reflectance Transformation Imaging (RTI) techniques. Selection of these perceptual enhancement filters can significantly improve the user's ability to interactively inspect the content of 2D RTI media by zooming, panning, and changing the illumination direction. In particular, we present two groups of strategies for RTI image enhancement based on two main ideas: exploiting the unsharp masking methodology in the RTI-specific context; and locally optimizing the incident light direction for improved RTI image sharpness and illumination of surface features. The Result section presents a number of datasets and compares them with existing techniques.