Auto exposure limits

• MartyX Grover

  • May 19, 2021 17:14
  • Edited

  Hi Cristian Vilar  The RealSense SDK has supported an Auto-Exposure Limit for the IR sensors since SDK 2.42.0.  Does this feature fit your requirements, please?

  https://intelrealsense.github.io/librealsense/doxygen/rs__option_8h.html#a8b9c011f705cfab20c7eaaa7a26040e2ac11001971364b90b542941e51ebb911a

   

  https://github.com/IntelRealSense/librealsense/wiki/API-Changes#version-2420

   

  

   

  The Auto-Exposure Limit feature can be set in the RealSense Viewer at the bottom of the Controls section of the Viewer's 'Stereo Module' options.

   

  

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• Cristian Vilar

  • May 20, 2021 08:27

  Hi,

  I installed the SDK 2.43 and the auto exposure limit is implemented only for the depth camera, but I would like to control also the autoexposure limits of the RGB camera. Is it possible?, Is it possible to control this parameter using the Matlab wrapper?

  regards,

  Cristian

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• Cristian Vilar

  • May 20, 2021 12:28

  Matlab wrapper is not working for both Depth and RGB cameras.

  

  

   

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• MartyX Grover

  • May 20, 2021 16:40

  Your MATLAB sensor querying code looks similar to the code in the link below.

  https://github.com/IntelRealSense/librealsense/issues/7102#issuecomment-673623848

  Does your script follow that links's example in setting up sensors{1}{2} first before calling it in your realsense.option lines, please?

  sname = sensors{1}{2}.get_info(realsense.camera_info.name);
  disp(sname);

   

  An alternative to using index numbers to distinguish between depth and RGB sensors is to define a sensor as 'first depth sensor' or 'first color sensor'.  The link below provides a MATLAB wrapper example of doing so for the depth sensor:

  https://github.com/IntelRealSense/librealsense/issues/3358#issuecomment-475489478

   

  In regard to a limiter for RGB exposure, I am not aware of a way to implement a similar maximum exposure control for the RGB sensor.

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• Cristian Vilar

  • May 20, 2021 17:38
  • Edited

  Hi MartyG,

  Yes, I tried both methods and Exposure limit is not working in both sensors (depth & RGB)

  dev = profile.get_device();
  depthSensor =  dev.first('depth_sensor'); %color sensor also tried
  depthSensor.set_option(realsense.option.enable_auto_exposure,0);
  depthSensor.set_option(realsense.option.auto_exposure_limit,156);

  dev = profile.get_device();
  sensors = dev.query_sensors();
  sname = sensors{1}{2}.get_info(realsense.camera_info.name);  % {1}{1} RGB also tried
  disp(sname);
  sensors{1}{2}.set_option(realsense.option.enable_auto_exposure,0);   % {1}{1} RGB also tried
  sensors{1}{2}.set_option(realsense.option.auto_exposure_limit,156);   % {1}{1} RGB also tried
  
  

  regards,

  Cristian

   

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• MartyX Grover

  • May 20, 2021 17:57

  depthSensor.set_option(realsense.option.enable_auto_exposure,0); should be set to '1' instead of '0', as 1 enables auto-exposure and '0' disables it.

  And of course, Auto_Exposure_Limit will not work with the color sensor.

  I researched for further examples of MATLAB wrapper code for accessing the depth or RGB sensor individually but could not locate any, unfortunately.

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• Cristian Vilar

  • May 21, 2021 08:40

  Hi MartyG,

  I tried with the auto_exposure "1" and I got the same result:

  

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