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…

Need Training?

CHI offers training in Reflectance Transformation Imaging (RTI) and photogrammetry. Learn more about these classes. You can also write to

What Is Photogrammetry?

Photogrammetry refers to the practice of deriving 3D measurements from photographs. Learn more about the science of photogrammetry and how it is applied. See also our photogrammetry training class. More…

Preparing Penicaud enamel for RTI capture

RTI capture session of a painted enamel by Penicaud (French, 16th cent.)

Related Content


Cultural Heritage Imaging (CHI) offers easy-to-use gear for imaging projects at museums, archaeological sites, universities, libraries, conservation departments, and other sites where scientific imaging is required.

Photogrammetric Scale Bars

Photogrammetric scale bars CHI now offers a set of 10 calibrated scale bars designed by photogrammetry experts at the US Bureau of Land Management and CHI for accurate measurement and scientific imaging of 3D data. Scale bars are flat, lightweight linear bars in several sizes with coded and non-coded targets printed on them. This new product is unique in the world and uniquely suited to the practice of photogrammetry. More…

RTI Highlight Capture Starter Kit

RTI Highlight Capture Starter Kit contents CHI offers the RTI starter kit to support users, a physical starter kit that contains all the parts you need to capture images for RTI using the highlight method.

The kit contains a set of reflective spheres of various sizes, mounting hardware for the spheres, parts that you need to create a light wand, and miscellaneous items you will find useful in setting up and using your image-capture system.

The parts are contained in a durable Tuff storage box for easy transport and safekeeping. More…

Lighting Array

lighting array A lighting array is optional equipment but one that makes capturing and processing the imaging data much more efficient for the user.

At this time, Cultural Heritage Imaging (CHI) is no longer offering a lighting array. We are currently exploring other options for this equipment. If we have helpful information to share, we will update the Lighting Array page accordingly.