从图像ZBar扫描条形码

Question

我使用zbar扫描任何条形码，当时此API扫描条形码，也扫描图像。任何人，请帮我做this...assume，我有一个玛莎瓶子在那个瓶子里，条形码在那里，但特定的条形码是在橙色塑料上。当我扫描任何条形码图像时，zbar会扫描橙色的条形码。所以我只想得到条形码，而不是条形码的其他部分。

- (void)viewDidLoad
{
   [super viewDidLoad];
   reader = [ZBarReaderViewController new];
   capture = [ZBarCaptureReader new];
   capture.captureDelegate = self;
   reader.readerDelegate = self;
   reader.supportedOrientationsMask = ZBarOrientationMaskAll;
   ZBarImageScanner *scanner = reader.scanner;

    [scanner setSymbology: ZBAR_I25
                   config: ZBAR_CFG_ENABLE
                       to: 0];

}
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info 
{
    id<NSFastEnumeration> results =
    [info objectForKey: ZBarReaderControllerResults];
    ZBarSymbol *symbol = nil;

    for(symbol in results)
        // EXAMPLE: just grab the first barcode
        break;
    label.text = symbol.data;
    imageView.image = [info objectForKey: UIImagePickerControllerOriginalImage];

    // ADD: dismiss the controller (NB dismiss from the *reader*!)
    [reader dismissViewControllerAnimated:YES completion:^{}];

}

Answer 1

zbar不会为你修改图片。它为您提供未经修改即可扫描的图像。

您可以获得裁剪后的图像(扫描仪视图的矩形中的图像)

- (void)imagePickerController:(UIImagePickerController *)imagePicker didFinishPickingMediaWithInfo:(NSDictionary *)info {
    UIImage *img = info[UIImagePickerControllerOriginalImage];
    ZBarImage *cropped = [[ZBarImage alloc] initWithCGImage:img.CGImage crop:((ZBarReaderViewController*)imagePicker).scanCrop size:img.size];
    //...
}