PIRR – Introduction to Panoramic Infrared Reflectography with Valeria

Panoramic Infrared Reflectography (PIRR) is an accessible, practical methodology for acquiring high-resolution infrared images of artworks using an InGaAs camera. Because scientific infrared cameras typically have small sensors, individual frames capture only a limited portion of a painting at a time. To overcome this limitation, PIRR uses a precision panoramic head to rotate the camera systematically and capture a sequence of overlapping close-ups, which are later stitched into a single, seamless reflectogram.

At the heart of this workflow is the Valeria panoramic head, a motorized positioning system specifically designed to interface with any InGaAs infrared reflectography camera. Valeria automates the scanning process, delivering precise angular steps and controlled motion during image acquisition, enabling consistent overlap and accurate coverage of the entire artwork.

This course introduces PIRR by explaining the theory behind panoramic scanning and guiding you through the hardware setup with Valeria, the interaction with your infrared camera, and the series of captures required for a successful reflectographic mosaic. Whether you are a conservator, researcher, or technical photographer, PIRR provides an efficient, low-cost alternative to traditional IR scanners, with flexibility and adaptability for a range of artwork sizes and imaging needs.