Sure, but you need Cover Art to be imported. Then you can test both dimensions, such as in a smartlist:
[Media Type]=[Image] ([Height]=<1000 or [Width]=<1000)
or for an expression column:
If(math( below([Width], 1000) | below([Height], 1000) ), Less < 1000x1000, Good!)
(This asks if the Width is below 1000, or the Height is below 1000.)