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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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MapAxesCalibrator set origin (0,0) at bottom left of image #290

Closed citpeks closed 2 years ago

citpeks commented 2 years ago

Currently a map with a scale bar has the origin (0,0) at the top left of the image. Images plotted from the selected points are upside-down (vertical reflection). This could be fixed by setting the origin of a map with a scale bar to the bottom left of the image. The following image illustrates the problem. The plotted image is upside-down. The change would only involve about five lines of code in axesCalibration.js to set the origin in wpd.MapAxesCalibrator. lake-in-india01

ankitrohatgi commented 2 years ago

Hi, this makes sense. I could add an option to change the origin for those who want the origin to be at the bottom left.

ankitrohatgi commented 2 years ago

Added an option to switch the origin: image

This will be available in the next release version of WPD.

citpeks commented 2 years ago

Thank you very much. After I emailed you, I opened a Github case. I am glad that you expedited this. I am in the process of doing a YouTube review of some plot digitizers for mapping lake areas. WebPlotDigitizer is the best and the easiest to use. This change will make my project much easier.

I am using digitization as a tool for the study of the Carolina Bays by applying least squares fitting of ellipses, as described in this video: https://youtu.be/A1gLaIIACnI

I really appreciate your help.

Regards, Antonio Zamora

On Wed, Jul 27, 2022 at 2:32 AM Ankit Rohatgi @.***> wrote:

Added an option to switch the origin: [image: image] https://user-images.githubusercontent.com/415640/181177359-6f79aa12-c860-406b-8c32-969e3146845c.png

This will be available in the next release version of WPD.

— Reply to this email directly, view it on GitHub https://github.com/ankitrohatgi/WebPlotDigitizer/issues/290#issuecomment-1196319168, or unsubscribe https://github.com/notifications/unsubscribe-auth/A2HVAVRBWT27OOXOT2ALYXDVWDJYBANCNFSM54W2MLEA . You are receiving this because you authored the thread.Message ID: @.***>

citpeks commented 2 years ago

Hello Ankit,

This video discusses WebPlotDigitizer for use on the Carolina Bays. I mention the quick response that you gave to my Github request. I am looking forward to the new version with the option for the origin at the bottom left of the image. https://youtu.be/ENyvwbZoSik

I am also a chemist. Here is my CV: https://www.scientificpsychic.com/az.html

Thank you, Antonio Zamora

On Wed, Jul 27, 2022 at 2:32 AM Ankit Rohatgi @.***> wrote:

Added an option to switch the origin: [image: image] https://user-images.githubusercontent.com/415640/181177359-6f79aa12-c860-406b-8c32-969e3146845c.png

This will be available in the next release version of WPD.

— Reply to this email directly, view it on GitHub https://github.com/ankitrohatgi/WebPlotDigitizer/issues/290#issuecomment-1196319168, or unsubscribe https://github.com/notifications/unsubscribe-auth/A2HVAVRBWT27OOXOT2ALYXDVWDJYBANCNFSM54W2MLEA . You are receiving this because you authored the thread.Message ID: @.***>

ankitrohatgi commented 2 years ago

Hi, I might take some time to test and distribute the next version officially. In the meantime, you can try the unreleased version here: https://apps.automeris.io/wpd_latest/

ankitrohatgi commented 2 years ago

Btw, thanks a lot for sharing your video! It's great to see how this software is being used!

nbehrnd commented 1 year ago

@citpeks @scipython En route for some different topic (related to Python) I became aware of Christian Hill's blog post about fitting (partially tracked) ellipses. It could be of interest for both of you, hence a tentative inclusion of him in cc (his GitHub landing page).