Downloads

Want to learn how to apply Reflectance Transformation Imaging (RTI)? CHI presents materials you can download to help you and your team “do it yourself.”

Using our documentation, collaboratively developed software, and physical RTI kit, you can learn how to use RTI and associated technologies to capture physical real-world subjects so their surface relief features can be examined in minute detail not visible with the naked eye.

The RTI Workflow: How the Work Is Done

There are three phases in the RTI workflow. These links correspond to each phase: click the links below to see what tools CHI provides for each step in the process.

Preparing a painted enamel by Nardon Penicaud, (French 1470-1542) for an RTI capture session. This RTI study revealed
a vast network of cracks, fissures, and glass disease or “crizzling”.

» Capture

1. Download the RTI Capture Guide and Checklist

	RTI: Guide To Highlight Image Capture (2.5 MB) Document Version 1.1 Describes the camera, lighting, software, object and reflective sphere setup and capture sequence process.
	RTI: Highlight Capture Checklist (82 KB) Document Version 1.0 Provides a list of what you need to get set up and capture RTI images.

2. Watch the Video: “Performing a Reflectance Transformation Imaging Data Capture”

Watch this brief how-to video to learn how to capture RTI images using the highlight method.

Performing a Reflectance Transformation Imaging (RTI) Data Capture from Cultural Heritage Imaging

3. Order the RTI Highlight Capture Starter Kit

Our starter kit is designed to get you up and running quickly when you are ready to apply Reflectance Transformation Imaging (RTI). It contains the physical parts you need to begin capturing RTI images using the highlight process. Order the Starter Kit…

Notes and Acknowledgments

These how-to-capture materials were funded in part by a grant from the National Park Service and the National Center for Preservation Technology and Training.

The contents are solely the responsibility of the authors and do not necessarily represent the official position or policies of the National Park Service or the National Center for Preservation Technology and Training.

Special thanks to Judy Bogart for donating her time to lead the team that wrote the documentation for the NCPTT project.

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» Process

Download RTIBuilder Software and the Highlight Image Processing Guide

See the RTIBuilder download page where you can download the RTIBuilder software, RTIBuilder Highlight Image Processing Guide, and sample files (coming soon) for experimentation.

RTIBuilder is software designed for cultural heritage and natural science applications. It enables users to manage all aspects of building Reflectance Transformation Images (RTIs). RTIBuilder is an interface to a set of tools that process image sets from a highlight RTI data capture to produce the final RTI file. RTIBuilder comes with a guide, “Reflectance Transformation Imaging: Guide to Highlight Image Processing Version 1.4” (PDF) that must be downloaded separately. The guide describes all the processing steps for creating RTI and PTM files, including the preparation of jpeg images prior to using the RTIBuilder application.  Download RTIBuilder, Highlight Image Processing Guide, and example files…

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» View

Download the RTIViewer Software, Sample Files, and User Guide

See the RTIViewer download page where you can download the RTIViewer software, RTIViewer User Guide, and sample files for experimentation.

The RTIViewer allows you to view and explore Reflectance Transformation Imaging (RTI) files at very high resolution (Polynomial Texture Maps, Hemispherical Harmonics Map, and Multiview RTI). You can view image files stored on your local file system, and remote files through HTTP.  Download RTIViewer, User Guide, and example files…