Finding cropped images in Lightroom

How do I find only the cropped images in my selected folder?
I don't see anyway to filter to show only cropped images.

I created a smart collection to show cropped images, however this shows "all" cropped images in my catalog and I only want cropped images in my currently selected folder.

I can modify the "Cropped Only" smart filter to include a folder and type in the name of the folder I want, but this would need to be modified for each folder.

I need a smart collection that would only include my currently selected folder and not require changes when I move to a different folder.

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Newbie, having fun.