Achieving high accuracy with L515 or D415
Hi. We are searching for a depth camera with lower than 1mm accuracy at 3 meters. It will be indoors and in a well lit enviroment. Target object will be tracked real time for movements and is not a reflective surface. My questions are as follows:
1- L515 Lidar cam offers <5mm depth accuracy at 1m with %95 reflective surface and VGA resolution. Can you give parameters for non reflective surfaces and XGA resolution? Or can i achieve better accuracy with multiple L515 cameras?
2- Which one (L515 or D415) will perform better in my situation with adjustments (Post processing vs.)?
3- Will using multiple cameras make any change for depth accuracy?
Thanks in advance.
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Hi Imutlu07 If you are tracking objects and will be using RGB and you will be using multiple cameras, I would recommend the new RealSense D455 stereo camera.
https://github.com/IntelRealSense/librealsense/issues/6610
It has the capabilities of a D435, plus a built-in IMU like the D435i and has increased accuracy over distance by a factor of 2x compared to the D435 models (so it has the same accuracy at 6 meters that the D435 does at 3 meters).
The D455 also has hardware improvements to enhance depth to color alignment - both the RGB and depth sensors are mounted on the same stiffener inside the camera, both have the same FOV size and the RGB sensor has a fast Global shutter like the depth for the first time (the RGB sensor had a slower Rolling type shutter in earlier 400 Series models).
400 Series cameras can also benefit from a strong light source when analysing the depth detail of surfaces.
In regard to multiple cameras, they can improve the quality of depth data because of "redundancy" in the data as FOVs overlap, and more than one camera is observing the same area.
The 400 Series also has 2.5 mm to 5 mm accuracy at a 1 meter range like the L515 does. Even with a D455 though you likely will not achieve less than 1 mm accuracy at a 3 meter range.
L515 technical support is handled on the RealSense GitHub forum so if you have questions about that model, please visit the GitHub at the link below and click on the New Issue button to post a L515 question.
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