The depth image is very unstable when the object is more than 20cm far away from camera

[Qiaoliang_L_]

Hello, i have developed with realsense camera with 3 months.

I want to build accurate face model for myself. but I have found 2 problems:

1. when my face is close to the camera (10~20cm), the depth image is stable (collecting 10 times, vary little),but when my face is 30 cm or more far way from the camera, the  depth image is very  unstable , the point cloud looks not like my face, even worse ,not like a face, the nose is not in nose shape. and the shape vary largely time to time (I am not moving ,but the depth image vary due to the measurement is not stable).

2. when  my face is close to the camera (10~20cm), the reconstructed face shape is distorted since too close.

I want to ask:  How can I build my accurate 3D face shape with this camera.

I have tried kinect2, it is very stable when I am 30-80 cm far away, but it do not work at 10~20 cm.

guys, help me!

[Qiaoliang_L_]

 I am using world coordinates.

How to obtain a stable depth image??

I  know there must be pixel unstable.

but if the pixels is measured for more times, the depth value should not vary too large ( as in my project, it vary 3~5 mm at 30cm far away)

[samontab]

You  can try changing the IVCam parameters...

[Qiaoliang_L_]

thanks ,but which  parameters  are realated to the depth measurement? there is no comment in SDK document.

would you pls tell me more details?

[samontab]

Take a look here for an explanation:

https://software.intel.com/en-us/forums/topic/537872