wrong model output

[mahdifarro]

hey guys,
I tried my model via your selfie segmentation sample but no matter what I do, it always gives the wrong output
these are model input and output dimensions:
input => type: Float32, dimensions: [1,256,512,3], height, width, channel
output => Int64, dimensions: [1,256,512,1], height, width, channel
(channel index is between 0-18 (index 11: person)

download the model with the below link:
https://drive.google.com/file/d/1cdSqIlg3ES7kRTZvmn8rxhYXCREIBSSC/view?usp=sharing