Exposure time units

sensors{1}{2}.set_option(realsense.option.exposure,120);

• MartyX Grover

  • May 17, 2021 15:38
  • Edited

  Hi Cristian Vilar  My understanding is that the unit of exposure is in milliseconds (ms) and its value can be controlled with microsecond (usec) granularity.  

  https://github.com/IntelRealSense/librealsense/issues/6384

   

  Also see point number 2 of the section of Intel's camera tuning guide linked to below.

  https://dev.intelrealsense.com/docs/tuning-depth-cameras-for-best-performance#section-make-sure-image-is-properly-exposed

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• Cristian Vilar

  • May 18, 2021 08:31

  Hi,

  In the camera tunning guide says that the stereo camera time exposure units are Microseconds. Therefore when you configure the time exposure value to "120" than means 120 Microsenconds.

  

  But for the RGB camera Im not sure about the units is because the time exposure range in the intel realsense viewer app is completely different that for the stereo-camera, and I couldn't find any documentation about this. It it is very important to include always the units in the documentation.

  Can you please confirm that the time exposure units for the RGB camera are also Microseconds? 

   

   

   

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• MartyX Grover

  • May 18, 2021 10:00

  The depth and RGB exposures use different scales of value, with large values for depth exposure (default 8500) and small values for RGB (default 156).

  I located a reference in the librealsense SDK's files that states the exposure of the RGB sensor to be in microseconds.

  https://github.com/IntelRealSense/librealsense/blob/master/src/ds5/ds5-color.cpp#L197

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