将Tesseract用于iOS

Question

我正在使用tesseract光学字符识别，它只读取300dpi的图像，当我使用UIImage拾取器控制器相机拍照时，图像是72dpi的，我如何才能像iOS中的股票应用程序那样以300dpi拍摄图像？

Answer 1

我在带有iOS7的iPad上使用Tesseract，下面的代码成功地呈现了UIImagePickerController，并且我得到了一个图像，我可以很容易地用Tesseract进行光学字符识别：

if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {
    iosPicker = [[UIImagePickerController alloc] init];
    iosPicker.sourceType = UIImagePickerControllerSourceTypeCamera;
    iosPicker.mediaTypes = [[NSArray alloc] initWithObjects: (NSString *) kUTTypeImage, nil];
    iosPicker.allowsEditing = NO;
    iosPicker.cameraCaptureMode = UIImagePickerControllerCameraCaptureModePhoto;
    iosPicker.cameraDevice = UIImagePickerControllerCameraDeviceRear;
    iosPicker.modalPresentationStyle = UIModalPresentationFullScreen;
    iosPicker.delegate = self;

    [self presentViewController:iosPicker animated:YES completion:^{}];

}

附注: iosPicker是在视图控制器的接口中定义的实例变量。