im2graph VS g3data

What are some alternatives?

When comparing im2graph and g3data, you can also consider the following products

WebPlotDigitizer - WebPlotDigitizer - Web based tool to extract numerical data from plots, images and maps.

Engauge Digitizer - This open source, digitizing software converts an image file showing a graph or map, into numbers.

Plot Digitizer - All-in-One Tool to Extract Data from Graphs, Plots & Images

DataThief III - DataThief III is a program to extract (reverse engineer) data points from a graph.

Silkscientific UN-SCAN-IT - Digitizing Software converts graph image files to usable (x,y) data automatically

GraphClick - GraphClick is a graph digitizer shareware for Mac OS X which allows to automatically retrieve the original (x,y)-data from the image of a scanned graphor fom QuickTime movies.