This filter applies the specified proportion to the image’s height and width when cropping. We can use the query parameter im=filters:proportion(value)
Normal Image:
https://push-3272.5centscdn.com/KB_IMG/Lights_5centsCDN.jpg
Transformed Image:
https://push-3272.5centscdn.com/KB_IMG/Lights_5centsCDN.jpg?im=filters:proportion(0.5)