Bounding box ratio

Assuming you are not using a rotated bounding box you can use the BoundsExtractor. If the difference between xmax and xmin is larger than the difference between ymax and ymin it is a landscape orientation, otherwise it's portrait.

Depends a bit on what you mean by ratio, but based on a BoundsExtractor you can do the following in e.g. an AttributeCreator:

ratio = @Evaluate((@Value(_xmax)-@Value(_xmin)) / (@Value(_ymax)-@Value(_ymin))):1

Result will e.g. be '2:1' for a rectangle that is twice as large as tall.

Thanks very much to both of you for your prompt answers, i can now get what i need from your suggestions

Simon Hume

@simonhume

You are trying to determine the aspectratio.

BoundingBoxReplacer (can also get the oriented BB and) has output attributes for longer and shorter side.

So you can check wich is longest and check with

Extract length, sort by length, sample 1 by length.

Pick the longest and check if it has angle 90.

This wil give you the required pageorientation, Portrait or Landscape.

If you use boundsextractor, you can do the same, be it you have to calculate it yourself. Like @david_r illustrates.