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 Engauge Digitizer tool accepts image files (like PNG, JPEG and TIFF) containing graphs, and recovers the data points from those graphs. The resulting data points are usually used as input to other software applications. Conceptually, Engauge Digitizer is the opposite of a graphing tool that converts data points to graphs. 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. * You are an engineer with some graphs in decades-old documents, but you really need the numbers represented in those graphs so you can do analyses that will determine if a space vehicle is safe to fly. There are more than 10 alternatives to DigitizeIt for Windows, Linux, Mac, Online / Web-based and Java. * You are a graduate student gathering historical data from charts for your thesis. The best alternative is WebPlotDigitizer, which is both free and Open Source. Other great apps like DigitizeIt are Engauge Digitizer, Plot Digitizer, g3data and PlotDigitizer. * You are a webmaster with visitor statistics charts and you want to do statistical analyses.
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