article_snippet: But a team of researchers from the University of Jyväskylä in Finland painstakingly  unearthed his own signature.
article_snippet: An oil painting was verified after a special camera was used to examine the composition of the work.
article_snippet: This allowed researchers to see different layers  including a previous signature by Claude Monet's.
article_snippet: Ilkka Pölönen, a researcher, said a special camera scans one 'line' at a time.
article_snippet: He told ArtDaily: 'When a special camera is moved using the scanner an image of the whole picture can be obtained.'
article_snippet: In this case a special camera was used to examine the composition of the work.
article_snippet: This allowed researchers to see different layers  including a previous signature - verifying that the painting was by Monet.
highlights_snippet: Researchers in Finland used special technique to unearth signature .