The depth information appears abnormal under a wide field of view

YaoHui

As shown in the video link, there seems to be a lack of depth information for the object under examination.
Is this phenomenon considered normal?
Our goal is to capture the midpoint of a person's face for world coordinate calculation, and any omission could lead to calculation errors.

jakaskerl

YaoHui
I'm confused as to what you mean by

YaoHui there seems to be a lack of depth information

You have captured the midpoint, the object is also visible on the depth map, its world coordinates can therefore be calculated.

Is the depth accuracy bad? Are there frames when there is no depth for the midpoint?

Thanks,
Jaka

Wilbur

jakaskerl ,

If I take the disparity of the eyes (where the eye region is black),
it seems that it will be difficult to accurately transform world coordinates.

Thanks.

jakaskerl

Hi Wilbur
This is expected since the pattern matching algorithm used in stereo is not able to match pixels due to the area inside the eyes being too homogeneous. You'd need some pattern on the eyes if you want correct depth there.

Thanks,
Jaka