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.




Comments
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.