• MATLAB Online cannot interact with hardware, including devices used for image acquisition and instrument control.
• Creating custom user interfaces, such as those built with GUIDE, is not supported.
• Windows-specific components like COM are not supported. 
• xlsread and xlswrite will work in basic mode.
• Using the MEX command to build C/C++ or Fortran MEX-files is not supported.
• Files larger than 16 MB cannot be uploaded on MATLAB Online.
• The graphical interface to the profiler is not supported.
• Use of the shell escape bang (!) command is not fully supported.
  

Only command-line access to Simulink, via the sim command, is supported.

vision.VideoPlayer System Object
vision.DeployableVideoPlayer System Object
Camera Calibrator
Stereo Camera Calibrator
Training Image Labeler

Simulink blocks