CurveSnap – Image curve extractor (21,065 views)

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download CurveSnap V1.1 (4547)


The codes is put on github on 2014/5/3
https://github.com/xoofee/CurveSnap

The author is sorry that the codes have few comments

For bugs and advice, please add new issue in https://github.com/xoofee/CurveSnap/issues

The following tutorial is from V1.0, while the current V1.1 is sightly different on output control. Please refer to the updated pdf tutorial file in the package.

1 Capture curve from screen – A first example

2 Choose curve by connectivity

3 Copy the data

4 Open existed image – A second example

5 Calibration

6 Erase to make curve isolated

7 Choose data points by dragging a rectangle

8 Choose curve by its color

If the desired data curve is colored, then Choose by Color is recommended.

9 Warning

Currently this tool have large error when the curve becomes a vertical line, especially in peaks and valleys, since the algorithm is designed to average in the vertical direction. For example:

Thanks Fernando for this bug feedback

13 Responses to CurveSnap – Image curve extractor

  1. Reply Insuk says:

    I’m finding a program which can extract (x,y) data from a scaned image showing a line.
    Curvesnap is exactly what I want. It is very easy to use. Thank you.

  2. Reply Aggrey says:

    This is a very wonderful too. Thanks alot

  3. Reply Axel P. von Bertoldi says:

    The program worked better than expected, and it has a few nice tricks (like the option to select line by pixels or linearly spaced) and I’ve must say, it also works flawlessly with Wine.
    Thanks
    Axel

  4. Reply Afaf says:

    well done :-)
    thanks

  5. Reply daan says:

    Great stuff and very useful! Thanks so much.
    Would be even better if semilog en log-log options were available

  6. Reply Luis says:

    It works great. Just follow the instructions above and kazammm ;-)
    It was a great help in chart analisys

  7. Reply Abhilash says:

    Any way in which I can extract the values from an image file into microsoft excel file?
    Thanks in advance

  8. Reply supriya says:

    the graph origin is (0,0) but the y axis starts from val 80 upto 100 with a step of 5,so how do i fix the calibration point on y axis?,coz (0,100) doesnt seem to give right coordinate valuessupriya

  9. Reply Marcos says:

    Is the source code available? Really nice piece of software, 10/10, but I would like to adjust some functions to my needs if possible.

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