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Depth frames

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Cristian Vilar

I would like to collect depth frames and compute later offline the pointcloud for each depth frame, but it is not possible (Matlab crashes).

for i=1:20
    fs = pipe.wait_for_frames();
    aligned_frames = alignedFs.process(fs);
    depth(i)= aligned_frames.get_depth_frame();
end
save ('depth.mat', 'depth')


load('depth.mat', 'depth')
for i=1:20
    points = pointcloud.calculate(depth(i));   --> FAIL
    vertices = points.get_vertices();
    vertices2=[vertices(:,1), vertices(:,3), -vertices(:,2)];
    PC=pointCloud(vertices2);
end

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Comments

6 comments

Date Votes
  • MartyX Grover
    • Edited

    Hi Cristian Vilar  Are you using the RealSense MATLAB wrapper with Windows 10 please? 

    https://github.com/IntelRealSense/librealsense/tree/master/wrappers/matlab 

    If you are using the wrapper, are you using MATLAB R2017b with it and have the camera plugged into a USB 3 port, as required by the wrapper's instructions? 

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  • Cristian Vilar

    Hi,

    I´m using the wrapper with Windows 10, an USB 3.0 port and Matlab2019b

    The issue is that I can not process the depth frames offline to compute the pointcloud. 

    Cristian

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  • MartyX Grover
    • Edited

    The MATLAB wrapper requires MATLAB 2017b.  A MATLAB user recently experienced Frame didn't arrive within 15000 errors when attempting to run scripts with MATLAB 2019a and 2020a.  Have you experienced this error too?

    https://github.com/IntelRealSense/librealsense/issues/8113 

    An official feature request for the addition to the wrapper of 2020b support has been submitted, but that support is not available at this time.

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  • Cristian Vilar

    I try with the matlab2017b.

    I have the same error.

    error message is:

    This error was detected while a MEX-file was running. If the MEX-file is not an official MathWorks function, please examine its source code for errors. Please consult the External Interfaces Guide for information on debugging MEX-files.

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  • Cristian Vilar

    I didn´t experience the frame error you commented before.

    I´m trying to save the depth frames in a file and later process them to compute the poincloud.

     

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  • MartyG
    • Edited

    I could find only one past case where this MATLAB error has occurred with librealsense.  lramati, who is one of the main contributors of example programs in the RealSense MATLAB wrapper, offered advice in this discussion.

    https://github.com/IntelRealSense/librealsense/issues/6057 

     

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