Is the behaviour of reciprocal operation decreasing the depth values at attention boundaries intended?

[Baumflaum]

Greetings,

as far as I understood it, calling a convolution with a 1-filled matrix and then inverting the result on the mask should result in a decrease of depth values at attention boundaries. Example:

5 visible pixels on an 3x3 kernel results in the value 5 in the intermediate mask(IMask), resulting in 0.2 after the reciprocal operation.

Anyways, results look great!