What Is RTI?

Reflectance Transformation Imaging (RTI) is a computational photographic method that captures a subject’s surface shape and color and enables the interactive re-lighting of the subject from any direction in a software viewer, revealing details not visible with the naked eye. Learn more…

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Downloads Archive

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This page provides links to previous versions of RTI user documentation and software offered by Cultural Heritage Imaging (CHI). As updated software and guides become available, we will move the older versions to this Archive area.

» Find all the current versions of our freely available software and guides.

RTIViewer Version 1.0.2
RTIViewer Version 1.0.2 Apple/Mac logo Intel Macs
RTIViewer Version 1.0.2 Windows logo Win32
RTIViewer User Guide 1.0.2 (PDF) Acrobat PDF logo
Note: the User Guide is also contained in the software download. The User Guide includes installation instructions.
Example Files symbol for example files Ancient Papyrus.zip (6 MB) Ancient Papyrus from the Bancroft Library

Rock Art Petroglyph.zip (4.8 MB) Legend Rock State Park in Wyoming
License GNU license icon This software is available under the Gnu General Public License version 3. If you wish to receive a copy of the source code for RTIViewer Version 1.0.2, please send email to info@c-h-i.org.

RTI Capture User Guide Version 1.1
RTI: Guide to Highlight Image Capture, Version 1.1 (2.5MB) Acrobat PDF logo
This is the original v1.1 guide describing the camera, lighting, software, object and reflective sphere setup and capture sequence process.