getsize() depricated in Pillow>=10.0.1

[vera-bernhard]

getsize() is deprecated and replaced with getbbox() in Pillow>=10.0.1

I replaced it in visualization.py such that it works with both newer and older Pillow versions.

There are other instances that also need to be adapted, but I have refrained from adapting them everywhere due to a lack of testing possibilities.

[Pancham1603]

getbbox() doesn't return the width and height, it gives the coordinates. Will have to use left right top bottom values to get the width and height.