Question about depth calibration

[LZL-CS]

Hi, may I know why here needs to negate the y-axis again? As I know, the depth sensor and camera sensor use the same coordinate in the Kinect (https://learn.microsoft.com/en-us/azure/kinect-dk/coordinate-systems).

hscnet/datasets/utils.py

Line 30 in 543ff9f

ccoord_color[1,:] = - ccoord_color[1,:]

Hope for your reply, thanks in advance!