Multi-Dimensional Analysis of An Oil Painting

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Multi-Dimensional Analysis of An Oil Painting

• Center of Imaging Science
• Rochester Institute of Technology
• Pano Spiliotis
• May 7,1999

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Overview

• Background
• Procedure
• Results
• Evaluation of data
• Conclusion

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Background

• Multi-dimensional segmentation.
• Using image capturing protocols and
  multi-dimensional segmentation, artifacts that
  are present in works of art will be easily
  identified.
• New approach in finding artifacts in oil
  paintings.

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Overview

• Background
• Procedure
• Results
• Evaluation of data
• Conclusion

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Camera Setup

• Monochrome CCD camera
• Ultraviolet Black Light (Blue light)
• Tungsten Light Source
• Infrared Filter
• Important that images
• are in registration.

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Illumination

• Three types
• Ultraviolet
• Visible
• Infrared

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Ultraviolet Illumination

• Ultraviolet Illumination
• New Varnish
• Over-painting

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Visible Illumination

• Topographical Inspection
• Canvas Repair
• Buckling of Canvas
• Over-painting

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Infrared Illumination

• Infrared filter is presented to the system.
• Under-drawing
• Areas that are not present in the UV and VIS.

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Flat Fielding

• Procedure taking a non-uniformly illuminated
  image and resulting in an evenly illuminated
  image.

non-uniformly illuminated image
Flat-fielded image
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Image Segmentation

• Looking for common areas.
• Segmentation of a common area.
• Trial and error.
• Save common area as an image and pixel value.

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Overview

• Background
• Procedure
• Results
• Evaluation of data
• Conclusion

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Results
Visible image
Infrared image
Ultraviolet image
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2-D Segmentation Program
Visible Image
Visible Image
Infrared Image
Infrared Image
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Pseudo Coloring
Visible Image
Infrared Image
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After Segmentation
Visible Image
Visible Image
Infrared Image
Infrared Image
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Overview

• Background
• Procedure
• Results
• Evaluation of data
• Conclusion

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Evaluation of results

• Areas that have been segmented reveal artifacts.
• John Sutton, Associate Conservator from The West
  Lake Conservators, was called in to prove these
  findings.
• The halo is not the original halo painted.

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Conclusion

• Research proved to be successful.
• 2-D Segmentation provides art conservators with
  a tool to validate their discoveries.