Infrared Reflectography (IRR) allows for identifying underdrawing and pentimenti. InGaAs cameras are the standard for Infrared Reflectography. Unfortunately, they have small sensors of just 320×256 pixels.

Consequently, in order to produce an IRR image of a work of art with enough resolution, we need to stitch a large number of close-up IRR images. This process can be done with a Panoramic head and the method is called Panoramic Infrared Reflectography (PIRR).

Panoramic Infrared Reflectography (PIRR) is a fast and practical solution for these images acquisition. The PIRR method consists of taking a series of images of a scene with a precision rotating head and then using a panoramic software to align and stitch these shots into a single, seamless panorama. The pano software is easy to use; the overall panoramic method does not require specialized personnel or intensive training and, for these reasons the method is appealing to medium‐small museums and private conservators who want to implement an affordable method to professionally document their collections.

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