Here I am trying to say a ratio as in 1 and 2.
What would be a good option to explain a ratio is this and that - either 1 or 2
The ratio of minimum rectangle’s floor area to enclosed circle area is tested with a defined threshold and a candidate, given a low ratio, is taken as natural object assuming that natural object has a more irregular boundary.
The ratio between floor area of enclosed minimum rectangle and enclosed circle area is tested with a defined threshold and a candidate, given a low ratio, is taken as natural object assuming that natural object has a more irregular boundary.