Multispectral Imaging, Analysis & Rendering: Analyzing Biological Materials

This research investigates imaging techniques and algorithms that use ultraviolet, visible, and near-infrared spectra to analyze shape and appearance in biological materials and cultural heritage artifacts. We have introduced principles and tools for multispectral data processing (like 2D to 3D alignment without distortion), multispectral stylization that uses near-infrared analysis to reveal sub-surface shape, bispectral shading for detail enhancement at different magnifications, and multiscale curvature shading and line drawing.

Other investigations implement new UV imaging and texture transfer frameworks for reconstructing faded (or invisible) appearance in complex natural materials. This work involves multidisciplinary collaborations and user studies with experts in forensics, biology, anthropology, and paleontology. Our evaluation metrics validate the accuracy and utility of computed shape layers (normals) for new forms of analysis in life science research and museum conservation not available in prior work. 

3-D Material Style Transfer for Reconstructing Unknown Appearance in Complex Natural Materials

Ranjan S, Toler-Franklin C. 3-D Material Style Transfer for Reconstructing Unknown Appearance in Complex Natural Materials
arXiv:2112.15589. 2021. https://arxiv.org/abs/2112.15589

Non-Photorealistic Rendering of Layered Materials: A Multispectral Approach

Toler-Franklin C, Ranjan S. Non-Photorealistic Rendering of Layered Materials: A Multispectral Approach
arXiv:2109.00780. 2021. https://arxiv.org/abs/2109.00780

Illustration of Complex Real-World Objects using Images with Normals

Corey Toler-Franklin, Adam Finkelstein, and Szymon Rusinkiewicz.

International Symposium on Non-Photorealistic Animation and Rendering (NPAR) San Diego, CA, August 2007

TEXTBOOK CHAPTERS: Blackwell Companions to Anthropology – A Companion to Rock Art

TEXTBOOK CHAPTERS

Blackwell Companions to Anthropology: A Companion to Rock Art

Chapter 14: Rock art as digital heritage: advances is photo enhancement technology and digital archiving Ruth Tringham, Michael Ashley and Cinzia Perlingieri (University of California, Berkeley) , Liam Brady (University of Western Australia), Mark Mudge, Tommy Noble, Neffra Matthews, Szymon Rusinkiewicz , Corey Toler-Franklin and Carla Schroer (Cultural Heritage Imaging, Princeton University), Wiley Publishing 2012.

Thesis: Matching, Archiving and Visualizing Cultural Heritage Artifacts Using Multi-Channel Images

Thesis
Matching, Archiving and Visualizing Cultural Heritage Artifacts Using Multi-Channel Images

Corey Toler-Franklin
PhD thesis, Princeton University, May 2011.