Apps similar to Plot Digitizer include LabPlot, which is free and open source. Other options are WebPlotDigitizer, Engauge Digitizer, g3data and PlotDigitizer. You can choose from more than 10 Statistical Analyzers like Plot Digitizer for Windows, Linux, Mac, the web and self-hosting.
LabPlot is a free, open source and cross-platform Data Visualization and Analysis software accessible to everyone and trusted by professionals.
Germany
EU
A large quantity of published data is available only in the form of plots and it is often difficult to extract numerical data accurately out of these pictures. There are several softwares available to aid this process, but most are either paid or poorly written.
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.
PlotDigitizer is data extraction software. It allows users to extract data points from graphs, plots, charts, and scanned documents.
SmartPlot is a desktop scientific plotting and data analysis application designed for researchers who want a direct workflow from data tables to editable, publication-ready figures.
Hong Kong
Sometimes it is necessary to extract data values from graphs, e.g. in most scientific publications only plots but no data values are published. DigitizeIt makes it easy to actually get back numbers from such a plot!
GermanyEU
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. Free download. Features automatic detection of solid, dashed or dotted lines, bar charts or symbols.
Switzerland
UN-SCAN-IT graph digitizer converts scanned graphs to real xy data automatically. Extract xy data values from published graphs, old plots, and strip charts.
United States
jTechDig is a software tool written in Java for digitizing data from an image of graph or plot. jTechDig can import images from .gif, .bmp, .png etc. files. After mapping of the coordinates system the data can be digitized manually by clicking the mouse.
im2graph is a free digitizing software that converts graph-images to graph-data, that is to numbers.
Israel
Take any graph or data from any source (Web or PDF document, for example), add your comments, and perform any manipulations, like nonlinear regression or curve fitting. Then print your results or export them to Excel or other database.
