iOS 11 Vision. Text detection

detect-text.swift

let image = UIImage(named: "text.png")!
let vnImage = VNImageRequestHandler(cgImage: image.cgImage!, options: [:])
let textRectsRequest = VNDetectTextRectanglesRequest { (request, error) in
    if let results = request.results as? [VNTextObservation] {
        for result in results {
            print("boundingBox \(result.boundingBox)")
            print("characterBoxes \(result.characterBoxes)")            
        }
    }
}
textRectsRequest.reportCharacterBoxes = true

try vnImage.perform([textRectsRequest])