An enumeration of different ways Vision can crop and scale an input image.
SDKs
Framework
enum VNImageCropAndScaleOption : UInt
Scaling an image ensures that the entire image fits into the algorithm's input image dimensions, which may require a change in aspect ratio. Each crop and scale option transforms the input image in a different way:
case centerA scaling option that maintains aspect ratio to fit the short side, and crops the centered image on its long side.
case scaleAn option that scales an image to fit the input image dimensions while maintaining aspect ratio.
case scaleA scaling option that scales an image proportionally so that its shorter dimension fills the canvas, potentially cropping along the longer dimension.
var imageAn optional setting informing the Vision algorithm how to scale an input image.