The accuracy of the depth camera about hololens2forcv

[kysucix]

hi, the multi path effect usually happens in specif part of the scenes such as the corner of a room. Could you provide an example of the misalignment you are experiencing. I'm not sure I've experienced such a systematic error.

[Bornblack]

Thanks for your reply! After some tests, I find the misalignment mainly happens on a 3D-Printing model. The printing material is photosensitive resin, and I guess the special material should be blame for the misalignment causing kind of complex physical phenomenon involving optics.
I have also done some funny tests like reconstructing the point cloud of the face of my colleagues(holding still) and visualizing it in real time, there was also a slight misalignment .:joy: But I thinks the result is reasonable as the capability of the depth sensor.

Recently I encounter another problem . I normalize the raw AB frame data (16 bit-->8bits, 0~255) and visualize it. There are some strange values in the image as shown below. The strange stuff on the monitor is probably caused by the light source of depth sensor. But why dose some parts of my hand near the depth sensor look darker?

Any reply will be appreciated.

[agroenenberg]

I have the same problem. The pointcloud is projected about 2 cm under the real surface. XY are projected perfectly but the real depth seems to have some kind of systematic error. It's always in the Z/ depth direction as seen from the HoloLens 2. I used mattifying spray on my 3D print but on the 3D print as well as a human face there seems to be an offset

[chiarapalu]

Same here, however an optical tracking marker is almost perfectly detected in depth. Any suggestion on how to improve this aspect?Thanks!

[agroenenberg]

Any update on this @kysucix ? It would be nice to get this improved, but I feel like this git has gotten some radiosilence... :( The problem should be somewhere in the depth sensor or in the RMApi functions provided to extract the depth map, since the full scene meshes also have this offset on the z-axis while fully rendered as a mesh on the HoloLens 2. If I overlay my hologram onto the readily recorded pointcloud, it is exactly on the right location. Only when rendering via the HoloLens 2, the offset @Bornblack describes is visible.