Merge 2D image and depth map

Thank you for your response. I have seen an example on the mechmind page for projecting a 2d image onto a point cloud. What I want to do is to create a mask with everything at a certain distance from the camera to filter the 2D image, but at the moment I don’t know how to do it.
The camera returns me this parameters, but I don’t understand the translation that the camera is giving to me.

Rotation: From Depth Camera to Texture Camera:
[0.9994753140272203, -0.004729284653347138, -0.03204263592242101]
[0.004422137710777892, 0.9999436627330821, -0.009649666212622343]
[0.032086466746217575, 0.00950290621945331, 0.9994399198676868]

Translation From Depth Camera to Texture Camera:
X: -20.705958880687646mm, Y: 2.605356548486989mm, Z: 20.070005911936793mm