Note
Author(s) affiliated with: Institute for Aerospace Research, National Research Council of Canada.
"August, 1995".
Executive summary in English and in French.
Summary
"Edge of Light scanning is an optical enhancement technique invented and being developed at the Institute for Aerospace Research at the National Research Council of Canada for the inspection of aircraft exterior surfaces for crack detection. With the development of a temporary film coating procedure, the technique was adapted to the inspection of paper surfaces. This led to investigation of counterfeit money, art forgery, handwriting impressions, altered credit cards and fingerprints."