https://github.com/lackhole/plotting-for-opencv

Plotting for OpenCV (C++)
https://github.com/lackhole/plotting-for-opencv

cpp graph image math opencv plot plotting

Last synced: 5 months ago
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Plotting for OpenCV (C++)

• Host: GitHub
• URL: https://github.com/lackhole/plotting-for-opencv
• Owner: lackhole
• License: lgpl-3.0
• Created: 2018-09-30T06:13:16.000Z (about 7 years ago)
• Default Branch: master
• Last Pushed: 2019-12-06T14:09:56.000Z (about 6 years ago)
• Last Synced: 2025-04-14T17:32:20.585Z (8 months ago)
• Topics: cpp, graph, image, math, opencv, plot, plotting
• Language: C++
• Homepage:
• Size: 596 KB
• Stars: 4
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

          
# Plotting for OpenCV

## Plotting for OpenCV(C++)

Simple Plot  

  

GUI Plot  



## Requirements :

        -OpenCV version 3.4.0 or later (4.X might not be compatible)

1. Include plot.h, plot.cpp to your main project

2. Create `Canvas` for drawing plot(written below)

3. Draw!

## Creating Canvas Examples:

        Canvas instance([height],[width],["Title Name"]); ::

        

        Canvas example1(600,800,"Example Plot");

        Canvas example2(700,700);

        Canvas example3;

        example3.create(400,500);

        Canvas example4;

        example4.create(500,600,"Example Plot");

        

After you declare a empty Canvas, you can draw a plot with number of dots, array of x and y data, and Scalar color(provided by OpenCV).

For example, let's assume that x[100] and y[100] is filled with data.

        example1.draw(100,x,y,Scalar(0,0,0));           // draw first 100 numbers of array x and y

        example1.draw(30,x,y,Scalar(255,0,0));          // draw first 30 numbers of array x and y

        example2.draw(70,x,y,Scalar(0,0,255),"y=sin(x)"); // draw first 70 numbers of array x and y, with name shown with colors.

        

   + Alert : ranges are set by first given plot.

        if you draw x[]={1,2,3} and y[]={-1,-2,-3} first, then draw x2[]={4,5,6},y2[]={7,8,9} later,

        the range is fixed to x-axis = [1,3] and y-axis = [-3,1], so x2 and y2 is not visible.

        You can solve this by setting range manually, or draw big invisible(white) dummy plot first.

        

        

After you draw a plot, you have to call show() function.

        example1.show();

        example2.show();

        You can also show multiple plot at once.

        Given example will show 2 plots.

                

## Functions:

`Double click` to zoom in, press Home Button to return.

## Additional Options:

        example1.grid(true)     // turns on grid

        example2.expand(false)  // turns off expanding axis range. default expands 20%

        example3.range(0,10,20,50)      // set range manually.

        example1.write("C:/myfolder/","plot.png")       //save plot.png at C:\myfolder\

Currently in develop! :D