Coverting scanned graphs to data, that is, extracting (x,y) data from scanned graphs can be useful for analyzing data from published graphs, analog instruments, strip chart recordings, or any other hard copy graph or plot. This is sometimes called a "plot digitizer", "graph digitizer", or "optical plot reading" (OPR)
Very easy to use, five steps:
1 Capture curve from screen - A first example
3 Erase to make curve isolated
4 Choose curve by connectivity, color, dragging a rectangle, points
5 Copy the data
Engineers, students, scientists, researchers, who may want to convert image curves to data
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