Information on more packages, including obtaining structure co-ordinates from stereo structure diagrams appreciated.

Some subsidery hints on using the software and image converters are also mentioned.

Thanks to Jim Quinn (E=mail: jquinn@dol1.eng.sunysb.edu) for providing extra links.
Thanks to Klaus Reimann (E=mail: klausr@ITAP.Physik.Uni-Stuttgart.De) for information on WinDIG.
Thanks to William Vetter (E=mail: wvetter@ms.cc.sunysb.edu) for information on Engauge Digitizer .

• Engauge Digitizer - Picture to number tool for Linux, Windows and source code
  • Compensates for image distortions, from scanners and fax machines, in graphs
  • Handles cartesian, polar, linear and logarithmic graphs
  • Scanning algorithm recognizes curves and applies points automatically
  • Extensive preview capability while modifying settings
  • Cross platform capability
  • At http://digitizer.sourceforge.net/

• Computer Program to Digitize X-Y Plots for UNIX
  • Convert a hardcopy graph into data.
  • "DIGITIZE software was primarily developed to convert Integrated Fast Reactor (IFR) fuel element profilometry traces on paper into digital form."
  • "The tracing of the plot line is fully automated."
  • At http://www.anl.gov/LabDB/Current/Ext/H021-text.001.html

• Datathief for Mac
  • Convert a hardcopy graph or plot (data points of a curve) into data.
  • If getting a "not enough memory error" or "can draw world error", exit DataThief, highlight the datathief ICON; do "File, Get Info" and increase the Preferred size of memory. By default it can be only 512K. Personally increased this to around 30 to 60 MegaByte.
  • To convert a solid curve back to data, enable the Options, Auto-tracing. Define the first part of the curve/line, and the end part of the curve/line and Datathief will do the rest. (very nifty)
  • At http://www.nikhef.nl/~keeshu/datathief/
  • "update of 06 november 2000: version 1.1.0"

  • Or via http://archives.math.utk.edu/software/mac/graphingAids/.pkgList.html

  • http://wuarchive.wustl.edu/edu/math/software/mac/graphingAids/DataThief/
  • http://archives.math.utk.edu/software/mac/graphingAids/DataThief/
  • http://archives.math.utk.edu/software/mac/graphingAids/DataThief/
  • http://www.zdnet.com/downloads/stories/info/0,,MC11473,.html
  • http://www.allmacintosh.at/preview/48730.html

• Didger for Windows
  • Convert a hardcopy points into data.
  • At http://www.geoafrica.co.za/reddog/golden/didger.htm

• DigiGraph for Windows
  • Convert a hardcopy graph into data.
  • "DigiGraph can be used to digitize: Strip Chart Output, Recorder Output, Published Graphs, Old Graphs and Drawings, Instrumental Output, Scatter Plots, Any hardcopy graph."
  • At http://www.angelfire.com/in/cirkulus/index.html

• Digitize for Windows - Hallogram
  • "The Point Digitizer converts coordinates from any WinTab-compliant digitizer to real-world units based on three calibration points."
  • At http://www.hallogram.com/science/digitize/

• Digitize for Windows - Yaron Danon
  • Convert a hardcopy graph into data.
  • "Digitize v1.38 x,y plot digitizer (scanned plot to x,y points)"
  • At http://garbo.uwasa.fi/windows/plot.html
  • Digitize v1.25 at ftp://ftp.industry.net/pub/sharewar/windows/digi125.exe

• NIH Image
  • "use macro 'Convert Line Plot to Points [C]';"
  • At http://rsb.info.nih.gov/nih-image/
  • PC Port at http://www.scioncorp.com
  • Java version http://rsb.info.nih.gov/ij/

• OPR (Optical Plot Reading) for DOS
  • Convert a hardcopy graph into data.
  • "OPR can process various "problematic cases" such as crossed lines, tilted plots, heavy gridlines etc."
  • "OPR offers automatic acquisition of several thousand points from a line (solid or dashed) or scatter graph."
  • At http://www.kotev.co.il/opr.htm

• Quicktrace for Mac
  • Convert a hardcopy graph into data.
  • Can handle a distorted page, ternary plots, polar plots.
  • At http://servermac.geologie.uni-frankfurt.de/QuickTrace.html
  • Also the author of Macdiff (user-friendly Powder X-ray powder diffractogram tool for Macintosh computers)

• TechDig for Win95/Win3.11
  • Convert a hardcopy graph into data.
  • At http://www.xnet.com/~ronjones/index.html

• UnGraph for Windows and DOS
  • Convert a hardcopy graph into data.
  • Has "automatic line-follower", etc, etc
  • At http://www.biosoft.com/ugwin.htm

• Un-Scan-It for Windows 3.1 and Win95 and Macintosh
  • Convert a hardcopy graph into data.
  • "Automatically digitize strip chart and (x,y) recorder output."
  • "Digitize old graphs for comparison with new data."
  • At http://www.silkscientific.com/

• WinDIG for Windows - Freeware - E-mail: Dominique.Lovy@chiphy.unige.ch
  • Convert a hardcopy graph into data.
  • Read image directly from a TWAIN/Scanner source.
  • "It has been reported to work also on NTx, Mac's (with a Windows emulator), and under Linux (with a recent flavour of Wine)"
  • "Digitize old graphs for comparison with new data."
  • "Most of the reported problems were due to buggy screen drivers. Upgrading to a more recent driver, or changing to a generic driver fixed the problems in most cases."
  • Hints to run:
    • Open up the BMP file, click on the define 3 points ICON, then define the three points of your plot.
    • Then, if you have scatter data - "left" mouse button - double click on the points.
    • If you have a curve - goto the left most part of the curve and click the "right" mouse button.
    • If it is a colour or grey plot, you may have to much around with the "Options Colour Limit" so it can track the desired coloured curve - or define the upper/lower colour limits (seems quite nifty if I could get it working happily ...... yes got it tracking the blue curve in the example file).
  • Has other functions for integration, etc.
  • Webpage http://www.unige.ch/cpb/windig.html

• Image Converters for Mac
  • Go to an Info-Mac mirror for good quality image converting software.
  • Such as ftp://mirrors.aol.com/pub/info-mac/_Graphic_&_Sound_Tool/_Graphic/

• Image Converters for Windows
  • Lview can do the job. Get an older version that seems to support more formats.
  • At http://www.lview.com
  • Try the usual software archives for Windows:
    • At http://www.tucows.com/
    • At http://wuarchive.wustl.edu/
    • At http://www.simtel.net/simtel.net/
    • At http://garbo.uwasa.fi/
    • At http://www.winfiles.com/
    • At http://www.32bit.com/
    • At http://www.download.com/
    • At http://www.zdnet.com/swlib/

• Searching for Software via Archive Servers
  • List of Archive servers at - http://web.nexor.co.uk/public/archie/servers.html
  • http://archie.th-darmstadt.de/
  • http://archie.belwue.de/
  • http://src.doc.ic.ac.uk/archieplexform.html