Pyinstaller reducing image quality

[Adrian Romanillos Botella]

Hello, I am retrieving 16-bit depth images from a camera, and I am showing them in a cv2 window and saving them in the disk, without any data type conversion. The images have good quality when i run them in my text editor or in the command window

I have used Pyinstaller to create an exe, without any change. After running the executable, even the images are showed and saved, they contain artifacts and show very poor quality ( see below). Is pyinstaller doing some data conversion that provokes this kind or artifacts? (left before pyinstaller)

info about my environment ( attached my spec file): 

-Windows 10

-Python anaconda 3.6

-Pyinstaller version: Pyinstaller-4.0.dev0 ( others gave an error)

-saving the files via tifffile library

[bwoodsend]

Hi, Could you provide a minimal Python script that causes the error so we can reproduce it?