Greetings: This is a question probably more related to machine vision, but I want to digitize a lot of hand-drawn graphs that we have accumulated over the years. I would like to scan them, have a clerical person select a line on the graph (maybe in several spots), and get back a set of XY coordinates of the line. (A bonus would be to select points on the axes and enter the values to automatically do scaling.) To confound the process, there is a grid on the image, and there are several lines which may cross each other at various angles.
My first thought is someone must have had this problem before and solved it -- if so, can I adapt your solution? (There was a product available commercially, but it didn't work worth a darn.) If not, can anyone suggest an approach? My first thought is to set an image threshold to convert it to ones and zeros, then do some kind of line-following algorithm that would take guidance from a human being. Fortunately, the desired data form smooth curves. It will be hard to discriminate between the line and the grid though. Regards, Allen -- Allen Windhorn, P.E. (MN), CEng (507) 345-2782 Kato Engineering P.O. Box 8447, N. Mankato, MN 56002 allen.windh...@emerson.com _______________________________________________ Image-SIG maillist - Image-SIG@python.org http://mail.python.org/mailman/listinfo/image-sig
