Application Highlight: GraphClick

GraphClick won an Apple Design award at last year's WWDC, yet I've somehow overlooked it until now. GraphClick is a graph digitizer software which allows to automatically retrieve the original (x,y)-data from the image of a scanned graph or from a QuickTime movie. Strange and innovative isn't it! I have to admit, the first time I read the description I was stupefied by the power and innovation wrapped up in this simple little application. The following tagline from the GraphClick website provides a more elegant description: "The idea is very simple, but its usefulness is likely to become essential." Whenever you come across a colleague that's bad at sharing his toys and his data you can skip the middle-man and extract the data directly from a publication or presentation. GraphClick features include:

  • Automatic detection of curves (solid, dotted or dashed), symbols, bar charts, or perimeters of areas
  • Almost all file formats recognized (PDF, JPEG, GIF, TIFF, Photoshop, etc.)
  • Frame-by-frame digitization of QuickTime movies
  • Image modification for adjustment (edge detection, blur, sharpen, etc.)
  • Can handle arbitrarily deformed axis systems, and two ordinate axes
  • Linear, logarithmic or inverse scales
  • Error bars
  • Several data set in the same document
  • Unlimited undo

GraphClick can be downloaded from the GraphClick Website.

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Datathief

Whilst certainly not as pretty as GrphClick, there is a java app called Datathief that I've used on occasions (http://www.datathief.org/).

additionally one might look

additionally one might look on the Qt-based free engauge/digitizer available at -> http://digitizer.sourceforge.net/ this one offers autotracing, Automatic grid line removal, Automatic point matching, and much more.