Engauge Digitizer 4.1

This open source, digitizing software converts an image file showing a graph or map, into numbers. The image file can come from a scanner, digital camera or screenshot. The numbers can be read on the screen, and written or copied to a spreadsheet.

The process starts with an image file containing a graph or map. The final result is digitized data that can be used by other tools such as Microsoft Excel and Gnumeric.

Main features:
-Automatic curve tracing of line plots
-Automatic point matching of point plots
-Automatic axes matching
-Automatic grid line removal for improved curve tracing
-Handles cartesian, polar, linear and logarithmic graphs
-Support for drag-and-drop and copy-and-paste makes data transfer fast and easy
-Image processing tools highlight data by removing grid lines and backgrounds
-Status bar suggestions guide beginners
-Context sensitive popup help windows reveal explain feature of the user interface
-Tutorials with pictures explain strategies for common operations
-Browser-based user manual is extensive yet easy to navigate
-Preview windows give immediate feedback while modifying settings
-Dates and times are imported with the Date/Time Converter
-Import support for common image file formats such as BMP, GIF, JPEG, PNG and XPM
-Export support for common software packages such as Microsoft Excel, OpenOffice CALC, gnuplot, gnumeric, MATLAB and Mathematica
-Engauge is available for a wide variety of platforms (Linux, Mac OSX, Windows)
-Engauge Digitizer is completely open source and free courtesy of Sourceforge, Trolltech and FFTW