automeris-io / WebPlotDigitizer

Computer vision assisted tool to extract numerical data from plot images.
https://automeris.io
GNU Affero General Public License v3.0
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XY calibration is not take into account in OSX M2 #304

Closed elcolie closed 1 year ago

elcolie commented 1 year ago

Version 4.6.0 (4.6.0) OSx: 13.2 (22D49) M2 I have calibrated the graph. image

The program does see the first datapoint as 700. Which is beyond the 1100 which is the lower bound of my plot.

image

Question: How do I get the correct value?

elcolie commented 1 year ago

Close because I am unable to reproduce this.

nbehrnd commented 1 year ago

These values are about the pixels of the illustration. Don't worry, continue to the point you collect the digitized data.

With four reference points*:

reference_points

you get to something similar to

digitized_data

* My personal preference is to define reference points for abscissa and ordinate without an overlay (e.g., on the origin of the coordinate system), i.e. x1 and x2 reasonably accurate on the horizontal axis, but not necessarily as much as equally well accurate along the vertical one, for example.