DigitizeIt can automatically digitize line-plots. Results may vary depending on the quality and colors of your graph. At the moment it is only possible to digitize solid lines, dotted or dashed lines can not be automatically digitized.
To automatically digitize a line-plot, select Auto->Find Line. Now click on the line that you want to digitize. The line will be digitized with maximum resolution, this means one data point for every digitize pixel in x-direction. The line thickness is averaged so the data points are always in the middle of the line. If you want less data points per line, change the max. number of data points in the Auto Options dialog. If you have defined a search region the line will only be detected within the search region.
2) Crossing lines or intersection with graph axes with the same color
Crossing of lines is not detected, this may cause DigitizeIt to follow
the wrong line. Same goes for graph axes. If lines have different colors
and the problem still occurs, try more stringent color settings in the Auto Options dialog. Otherwise you may want
to define a search region and digitize the
line in parts.
You can adjust the color and max. points on line settings in the Auto Options dialog.