Image resolution after prcoessing speckle filter and decomposition

Hello everyone,

I have some confusion regarding image resolution. I used ALOS-2 SAR images for speckle filtering and Yamaguchi decomposition.
I’m wondering if these two processes will affect the image resolution.
I didn’t observe any changes in the resolution.
If there is a change, is the formula for deteriorated resolution simply the original resolution multiplied by the window size?

Looking forward to your response.

Thank you