what are the differences between rgb/camera_info and depth/camera_info??

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hallo everybody,

this question may sound really silly but i'm really new to this thing. i have connected Kinect v2 with ROS through iai-bridge, ( https://github.com/code-iai/iai_kinect2 )

I'm trying to detect object with tabletop, since the iai-bridge only publish rgb/camera_info, i still need depth/camera_info. with topic_tool i relayed rgb/camera_info to depth/camera_info. but it seems it's a foolish thing to do..

can someone help me??

Thanks,