Cartoon of XRF discovery of hidden van Gogh painting

Cartoon of a scanning XRF experiment to investigate a hidden painting by van Gogh of the head of a peasant woman under the known painting “Patch of Grass” (1887). The program uses the function colormix from the Matlab File Exchange at Acknowledgements go to the enigmatically named “Jurgen” for this. The program uses five image files which are downloadable below. For more information about the original experiment, see: article by Dik et al.,