问题
I am trying to extract points from scanned image file from printed book. The image is quite clear.
Does anyone can help me?
回答1:
In R you can use the digitize package.
The full explanations are here and there and.. well google has lots more.
来源：https://stackoverflow.com/questions/19206378/how-can-i-extract-points-from-image-file-using-r