rmya / TextRecognition

Text recognition from image with Vision

TextRecognition

Text recognition from image with Vision

Recognize Text Function

private func recognizeText(image: UIImage?) {
    guard let cgImage = image?.cgImage else {
        print("fatal error could not cgimage")
        return
    }
    //Handler
    let handler = VNImageRequestHandler(cgImage: cgImage, options: [:])
    //Request
    let request = VNRecognizeTextRequest { [weak self] request, error in
        guard let observations = request.results as? [VNRecognizedTextObservation], error == nil else{
            return
        }
        let text = observations.compactMap({
            $0.topCandidates(1).first?.string
        }).joined(separator: ", ")
        
        DispatchQueue.main.async {
            self?.label.text  = text
        }
    }
    //Process Request
    do{
        try handler.perform([request])
    }catch{
        print(error.localizedDescription)
    }
}

If the camera does not support, the library opens when you want to take a photo from the camera.

  @objc func openCamera(sender: UIButton!){
    let picker = UIImagePickerController()
    picker.allowsEditing = true
    picker.delegate = self

    // The Xcode simulator does not support taking pictures, so let's first check that the camera is indeed supported on the device before trying to present it.
    
    if UIImagePickerController.isSourceTypeAvailable(.camera) {
       print("Camera is available")
       picker.sourceType = .camera
    } else {
       print("Camera is not available so we will use photo library instead")
       picker.sourceType = .photoLibrary
    }
    self.present(picker, animated: true, completion: nil)
}

recText.mov