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  Contour database

40 natural images (512x512 pixels), in PGM format, with associated ground truth contour maps.

  Traffic sign database 48 images (360x270 pixels), in PNG format, with natural scenes containing traffic signs.
  Ground truth data of vascular bifurcations in retinal fundus images of the DRIVE database 40 images (565x584 pixels) with marked ground truth in PNG format and 40 ascii files with the corresponding (row,col) locations.