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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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Specify plot color #187

Closed fsfuji closed 4 years ago

fsfuji commented 4 years ago

The problem I am having is with the scanned plot the colors are not uniform. I pick a color but have to pick the correct hue. With the mouse it takes some time to move it precisely. This can be accomplished quickly if I could use the keyboard keys to fine tune the position of the color picker.

nbehrnd commented 4 years ago

Hello fsfuji,

I assume your file is an x-y-plot. In the panel of «automatic extraction», just below the toggle of foreground color / background color, you find the entry of distance. The larger this number, the more tolerant webplotdigitizer is to recognize e.g., a turquoise as a blue. This adjustment is independent of (but may be quite boosted by) using the box and the pen-tool, too. It is shown around 9 minutes in Ankit's presentation on Plotcon2017.[1] Does this help you?

[1] The video is right below the presentation of the program itself, https://automeris.io/WebPlotDigitizer/

ankitrohatgi commented 4 years ago

Thanks @nbehrnd

I'd also like to add that you can also zoom-in if you want to select something from a very specific region.