leovandriel/cvplot

Graph plots, drawing, layout and windows in OpenCV

cvplot's Issues

converting figure to cv::Mat

@leonardvandriel wow, this is a great addition to c++ plotting!

I'd like to be able to write the figure to an image buffer. Is there a way to plot to a cv::Mat or convert the figure to a Mat?

save plot as image

Hi, is it possible to save the plot as an image.
I could not find any clear example for that.
thanks.

Decouple from GLFW

I really like this library and would like to use it in my project. However, its dependency on GLFW conflicts with the windowing system already being used with another dependency.

I do not see any reason for this coupling - is there a way to simply render figure to an OpenCV image so that I can do what I want with it, without requiring GLFW create window function to be called?

Thanks in advance.

Cannot make with OpenCV 2.4.9

Hi!

I just want to ask which opencv version you code can run on? I use 2.4.9 and get a hundreds of errors when building your project. However, I also believe it 's a great application. Thank you so much for sharing!

hang in release mode for all-zero input in VC++ 2017

In VC++ 2017, following line leads to hang-up/infinite loop in release build.
Debug build works fine.

cvplot::figure("roi").series("residue").setValue({0, 0, 0, 0, 0, 0, 0, 0, 0});

Axis colour is not correct

One of the axis colours is attached with the text_color_(not axis_color_). Is it intended?

https://github.com/leonardvandriel/cvplot/blob/e997368c6a3963159b8ae12dfa2c0f3c04d46083/src/cvplot/figure.cc#L650

Issue with multithreading

I am trying to use cvplot in 2 threads where each of the thread draws separate plots. The problem is that it freezes when view flush or finish is called. It seems like there is a shared component in the view class. Does anyone have the same issue?

PS. Same problem when thread 1 display opencv window and thread 2 try to draw a plot.

demo crashes when run from build folder

make demo works as does running ./bin/demo from the repo root directory. However if I cd to the bin directory and ./demo the program crashes with the error:

OpenCV Error: Assertion failed (ssize.width > 0 && ssize.height > 0) in resize, file /home/jason/mysource/opencv/modules/imgproc/src/resize.cpp, line 4044 terminate called after throwing an instance of 'cv::Exception' what(): /home/jason/mysource/opencv/modules/imgproc/src/resize.cpp:4044: error: (-215) ssize.width > 0 && ssize.height > 0 in function resize

Two small windows briefly appear but the larger demo one never does. I will see if I can figure anything out, but help would be great. This is a great project by the way.

set with vector<pair<float, cvplot::Point2>> does not work as expected.

It seems like set function does not handle cvplot::Circle data properly.

    std::vector<std::pair<float, cvplot::Point2>> pole({
      std::pair<float, cvplot::Point2>(5.0f,{X(0),Y(0)})    // Expected usage of set with vector<pair<float, Point2>>
      std::pair<float, cvplot::Point2>(X(0),{Y(0),5.0f})    // The code actually works.  
    });
    figure.series("South Pole")    
    .type(cvplot::Circle)
    .color(cvplot::Red)
    .set( pole);    
    figure.show(false); 

graph saving

Hi,
First of all, really nice project :)
Does it have a way to save plotted graph?

Resize the complete window

• How can I resize the main window consisting of several subwindows? (see image) Is something like cv::resize available?
• How can I have two main windows and either draw to window 1 or window 2? Currently I can open two main windows but it will always draw to the first one.

Thank you!

could you create small example for any graph?

enable white background and custom paleness

to have more customization of report colors:
please enable white background. currently white background result with pale gray.
please extern paleness as public.

hi

this will be a nice contribution if you think to contribute OpenCV library

Display multiple windows at the same time

As far as I know, the windows are displayed one by one，how to display multiple windows at the same time？

Question: How to visualize numbers on Y axis or the vertical axis?

How can I visualize the number along the vertical axis?

Given below is my graph. By default, i see the the numbers along the X axis (500, 1000).

Thank you.