pdf - How can we compare two plots? -


suppose have 2 similar plots.

  1. plot1 (already published in paper)
  2. plot2 (calculated using software)

my question is: how can compare calculated plot (pdf, png, jpeg, etc) plot in paper. thank you

to best of knowledge, there no software enable re-convert images nominal data.

however, it's not hard write piece of code it.

here steps (at high level):

  1. extract images pdf document (use itext)
  2. separate out images plot. can train neural network this, or can images contain lot of white (assuming that's background) , have straight lines in black (assuming that's foreground). or step manually.
  3. once have image(s), extract axis information. i'll assume simple lineplot. extract minimal x , y value, , maximum x , y value.
  4. separate out colors of lines in lineplot, , exact pixel coordinates. then, using axis information, scale them original datapoint.
  5. apply kind of smoothing algorithm. e.g. savitzky-golay
  6. if ever use data in paper, please mention gathered data approximation of graph. make clear did not use original source data.

reading material:


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