Help needed in Selecting a D400 series Camera
Hi,
I am a Student and have shortlisted Realsense D455 to use in my Thesis. I have some queries before I can order this product.
I will be filming a concrete mixer machine so I can get depth data of concrete while the mixer drum would be in continuous rotation.
Sample of drum :
https://i1.wp.com/theconstructor.org/wp-content/uploads/2017/11/pan-type-concrete-mixer.jpg?resize=450%2C219&ssl=1
1. From what I have gathered is that I would need both Global Sutter for RGB and Depth provided by D455 as the mixer would be continuously rotating so I would not get distortions. Is this correct?
2. Your website suggests that I should use D435i because my object would be in motion but RGB would be a rolling shutter if I also need normal feed so I should use D455. Is this assumption correct?
3. Also the camera would be prone to vibrations from the mixing drum so would this be an issue with the D400 series?
4. Most reviews of the D400 series or D455 suggest that these cameras have a lot of distortions in-depth maps and are not smooth as compared to rival technologies that may use Time of Flight systems how can we overcome these distortions?
Please guide me in choosing a proper depth camera solution from your series and I would also like to talk or chat with your technical advisor in detail if needed and if you can provide me with contact infos.
Thanks & Best of Regards,
Saad
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Hi Saad Azhar
1 and 2. RGB is not required for generating a RealSense depth image (which is produced by the infrared sensors), though it can be useful for aligning depth to color.
On the D435 / D435i, the RGB has a slow Rolling Shutter and the depth has fast Global shutters. If you feel that you may need fast RGB capture in future then the D455 will be an excellent choice.
3. The stereo depth algorithm on the 400 Series cameras is robust against vibration. If the camera is experiencing severe vibration though then you could add vibration damping pads on a camera tripod or at the point where the camera is mounted.
4. It is difficult to advise about correcting images without first seeing how the image is specifically being affected. There are a wide range of corrective measures that can be taken though. Intel's camera tuning guide can act as a guide to the some of the effects that may be encountered and ways to improve the depth image.
https://dev.intelrealsense.com/docs/tuning-depth-cameras-for-best-performance
There is also a table for comparing the specifications of RealSense models in the link below
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