Thank you very much. Is any information about how to translate from vision bounding box cgrect to UIKit coordinate space in objective c? I didn't found any page with information. In the tutorial that you attach there are some function en swift that i can't translate to objective c. This one: let rectangles = boxesAndPayload.map { $0.box } .map { CGRect(origin: $0.origin.translateFromCoreImageToUIKitCoordinateSpace(using: image.size.height), size: $0.size) } Thank you for your time