3-D Mask X-ray and CT Investigation

Drs. Scott Carroll1, Christian Widener2, and Fereidoon Delfanian3

1Manuscript Research Group, 2South Dakota School of Mines and Technology, 3South Dakota State University

Multi-View Stereo Vision

3-D Photo Capture

Elemental Analysis of Paint Pigments by X-ray

Fluorescence

Arsenic (As) in yellow -- Orpiment (As2S3)

Iron in red – Rust (Fe2O3)

Gold (Au) and Silver (Ag) content

Copper (Cu) in blue– Cuprorivaite (Egyptian Blue)

Identification of internal structure and linen, papyrus, and ink indications were observed

Indications of text within the

mask

CT Scan Setup

CT provides 3-dimensional x-ray data

CT provides 3-dimensional inside and outside surface data

Inside Surface of the Mask Face

Eye

Nose

Forehead

Eye

X-Ray –CT 3D Data

Multi-View Stereo 3D Data

Good Correlation of X-ray CT to Multi-view Stereo 3D Data (Deviation <2mm)

SummaryCurrently developing an advanced tool set to:

Accurately assess mask construction and areas of interest prior to extractionFully record 3-D Surface DataDocument visual appearance of the mask for reconstruction and replication with 3-D printingFabricate internal and external supports for the mask to support extraction, display, and transportation