depth_quantization

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Hello everybody,

I was looking at the compressed_depth_image_transport, and there are 3 parameters in the configuration file:

1. depth_max
2. depth_quantization
3. png_level

The description of depth_quantization parameter says that it is the depth value at which the sensor accuracy is 1 meter (Kinect : > 75). Although I have searched for the information, I haven't found anything that explains what units the depth_quantization is in. Could anybody please tell me or explain what the units of the depth quantization parameter are?