从静止/静态图像读取二维码

Question

我在一个应用程序上工作，我必须从静止图像读取二维码。以下是我用来读取二维码的代码：

CIImage *ciimage = [CIImage imageWithCGImage:[getRotatedImage CGImage]];

NSDictionary *detectorOptions = @{ CIDetectorAccuracy : CIDetectorAccuracyHigh };
            CIDetector *faceDetector = [CIDetector detectorOfType:CIDetectorTypeQRCode context:nil options:detectorOptions];

 NSArray *features = [faceDetector featuresInImage:ciimage];
            CIQRCodeFeature *faceFeature;
            for(faceFeature in features)
            {
                NSString *str = [NSString stringWithFormat:@"%@",faceFeature.messageString];
                break;
            }

这段代码可以很好地处理一些二维码，但有时它不能处理静止图像和返回空格数组。我已经搜索了很多，也看到了苹果论坛，他们也描述了相同的代码，我使用过。我还附加了未解码的图像。

请任何机构对此有任何类型的信息，然后与我分享。我将不胜感激。提前谢谢。

Answer 1

我刚刚在本地测试了你的图像，我可以确认，二维码没有被读取。我相信你的问题是二维码。看起来可能徽标干扰了CIDetector。我用另一个二维码替换了你的二维码，它起作用了。

UIImage *image = [UIImage imageNamed:@"qr3"];
    CIImage *ciimage = [CIImage imageWithData:UIImageJPEGRepresentation(image, 1.0f)];

    NSDictionary *detectorOptions = @{ CIDetectorAccuracy : CIDetectorAccuracyHigh };
    CIDetector *faceDetector = [CIDetector detectorOfType:CIDetectorTypeQRCode context:nil options:detectorOptions];

    NSArray *features = [faceDetector featuresInImage:ciimage];
    CIQRCodeFeature *faceFeature;
    for(faceFeature in features) {
        NSString *str = [NSString stringWithFormat:@"%@",faceFeature.messageString];
        NSLog(@"Found feature: %@", str);
        break;
    }

此日志：Found feature: http://en.m.wikipedia.org

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