Processing the results

…What we did Processing the results

…What we did Comparison by expert

…What we did Color categories

…What we did Color categories Brick Red

…What we did Color categories Deep brownish carmine Brick Red

…What we did Color categories Deep brownish carmine Brick Red Red

…What we did Color categories Deep brownish carmine Brick Red Red Carmine

…What we did Categories are “Fuzzy”

Fuzzy Weighting Function 0.40 0.14 0.84 0.17 1.00 …What we did Categories are “Fuzzy”

…What we did Theoretical development • Formulated a method for defining color categories • Created a model for understanding how individual perception can affect philatelic color identification • Correlated this model to “real” test data • Formed a building block for future philatelic color research

…What we did Using a scanner Spectroscope forTristimulus Values(X,Y,Z) CalibrateYour Scanner(R,G,B) 3D InterpolationFunction Maps to:(Xu,Yu,Zu) u’,v’ Unknown Sample(Ru,Gu,Bu)

What we learned • How to apply the VSC 6000 for colorimetry • Philatelic color is NOT a matching problem, it is about categorization • Colorimetry is faster and cheaper than x-ray spectroscopy methods • Scanners can be used to identify colors IF preliminary analysis has been performed

What’s next? • Completing the scanner mapping • Documenting and publishing all results • Extending the methodology to new projects

…What’s next? Documenting the work • Two papers: • Philatelic Shade Discrimination Basedon Measured Color (Herendeen, Allen and Lera) • Color Research and Applications and/or London Philatelist • Using a Scanner to Determine Stamp Shades (Herendeen, Allen and Lera) • London Philatelist or Collectors Club Philatelist

NPM Support • Value of NPM scholarship program • Leveraging human resources • Incubator for IAP

Acknowledgements • Mr. Allen Kane • For his vision of extending the services of the NPM to the philatelic world • Mr. Thomas Lera, Winton Blount Chair of Research, NPM • For his continual support and assistance with all aspects of this effort • Mr. James Allen, Senior Fellow, IAP • For his long hours sorting and categorizing Slovenian postage dues

The End

Processing the results