GraphClick is described as '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' and is an app in the education & reference category. There are more than 10 alternatives to GraphClick for a variety of platforms, including Windows, Linux, Mac, Web-based and Self-Hosted apps. The best GraphClick alternative is WebPlotDigitizer, which is both free and Open Source. Other great apps like GraphClick are Datafromchart, Engauge Digitizer, Plot Digitizer and DigitizeIt.
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.
Datafromchart operates as a web-based application, offering users the capability to extract data directly from charts. Designed with analysts and researchers in mind, it facilitates the extraction of estimates from various sources such as industry reports or research papers.
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.
Plot Digitizer is a Java program used to digitize scanned plots of functional data. Often data is found presented in reports and references as functional X-Y type scatter or line plots. In order to use this data, it must somehow be digitized.
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!
Very easy to use and works well.
g3data is used for extracting data from graphs. In publications graphs often are included, but the actual data is missing. g3data makes the extracting process much easier.
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.
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.
PlotDigitizer is data extraction software. It allows users to extract data points from graphs, plots, charts, and scanned documents.
im2graph is a free digitizing software that converts graph-images to graph-data, that is to numbers.
Germany
EU
United States
Israel
Graph click allows you to specify the axes coordinates one axis at a time. Engauge requires that you know both coordinates along each axis. This is not often possible. I have a graph where I don't know the x and y coordinates for the axes -- just one or the other. For certain types of graphs, Engauge is useless.