Some questions about the demo (infering on single images in general)

What is the 1.312 constant in output_to_depth function?
And what are the 0.1 and 10 inputs to the function? is it based on the training data and should change during inference?
In the demo visualization you use 0.1 and 5 instead of 0.1 and 10
Is the output of output_to_depth in meters? and output of the net (the sigmoid) is disparity?
I didn't see any reference in the repo or the paper...
Thanks!