Carla Schroer of CHI in a consulting session

Need some help? Let CHI experts advise you on your imaging challenge. CHI offers customized consulting services to both institutional and private clients, with special rates for nonprofit organizations. Projects of all sizes can be accommodated. Learn more…

National Endowment for the Humanities logo

Apply for NEH-Sponsored Training Classes

The National Endowment for the Humanities (NEH) awarded a grant to CHI to support training classes in Reflectance Transformation Imaging (RTI) and photogrammetry across the U.S. in 2016–2017. The classes sponsored by the grant are open to humanities collections professionals and pre-professionals by application. Learn more.

What Is RTI?

Read this overview of Reflectance Transformation Imaging (RTI), a breakthrough method of imaging used in cultural heritage and natural history documentation and preservation.

What Is Photogrammetry?

Learn more about photogrammetry and how its application captures extremely dense and accurate 3D surface data with standard digital camera equipment.

Questions About Training?

Please write to

Flickr Gallery: January 2016 Photogrammetry Training at the CHI Studio

A photo gallery of CHI's 4-day training class in photogrammetry in San Francisco.

Capturing the Olmec head for photogrammetry

Photogrammetry class trainees capturing an enormous Olmec head in San Francisco.


Contents:   4-day Photogrammetry Class  4-day RTI Class  4-day Class at Your Site  Half-day Workshop

4-day Photogrammetry Training
photogrammetry training class Learn how to acquire photogrammetric image sets and how to produce scientific 3D documentation with demonstrable accuracy.

You will leave with practical experience using equipment, image capture setups, and software to build 3D content. More…

Next class: Monday, September 25 through Thursday, September 28, 2017.
Interested? Let us notify you re future classes. Send email to to get on our “interested” list!
“Extremely informative and approachable instruction! I feel 100% capable going forward. Lots of personal attention.”—Trainee, CHI Studio, San Francisco

“Excellent one-of-a-kind class full of information not found anywhere else. I learned a lot more than I expected.”—Trainee, CHI Studio, San Francisco
4-day RTI Training
RTI training class Learn how to use highlight RTI to create digital representations of various objects.

You will leave with the ability to implement the digital imaging workflow, including steps to capture, process, and view RTI digital representations. More…

Next class: To be announced.
Interested? Let us notify you re future classes. Send email to to get on our “interested” list!
“Great balance between lectures and practical skills!”—Trainee, CHI studio, San Francisco

“Excellent balance of applied practice, i.e., using studio and photographic methods, techniques, and software. An energizing and inspiring week!”—Trainee, Buffalo State College
CHI Training Can Come to You
on-site training class Our training/consulting can come to your site!

CHI experts can deliver a 4-day training class in RTI or photogrammetry (or both)—optionally with consulting services—at your institution for groups of up to 15 people.

Write to with an inquiry or a proposal for on-site expertise using the latest digital imaging techniques. More…
“I learned a ton. Liked the balance of lectures and time to work in small groups on hands-on projects.”—Trainee, Worcester Art Museum

“Superb—well organized and taught by skilled, dedicated leaders.”—Trainee, Museum of Modern Art, New York
Half-day workshop
half-day workshop Sign up for our next workshop!

Whether you're an archaeologist, photographer, or staff at a museum or library, you'll learn about digital imaging techniques in conservation and education.

You will see examples of RTI applied to museum objects, paper collections, and archaeological sites. More…
“Great overview of sophisticated ideas that can be applied easily and professionally.”—Attendee, CHI studio, San Francisco

“The workshop was so engaging! It felt like an RTI Sampler, piquing my interest in the four-day class.”—Attendee, CHI studio, San Francisco

Cultural Heritage Imaging (CHI) offers classes and workshops in computational photography techniques used by cultural heritage and natural science professionals to document and research objects and artifacts. We train conservators, archaeologists, museum curators, museum photographers, anyone who wants to learn how to use the low-cost, digital techniques in which CHI specializes. We also train staff at special collections libraries on how to capture paper and bindings.

We hold training sessions on site at excavation sites, museums, and universities, and at the CHI studio in San Francisco, California.

Examples of Past CHI Training Sessions and Workshops

CHI has held training and workshops in association with the following institutions and projects, among others. These links lead to Flickr galleries, blogs, and other forms of detailed descriptions of past CHI training sessions.