Zbar找不到代码

Question

我正在尝试使用ZBar库(zbar.sourceforge.net)和opencv来查找二维码。

下面是我的代码：

string findIDIncircle(Mat img, double* angle)
{
    ImageScanner scanner; 
    zbar_image_scanner_set_config(scanner, ZBAR_NONE, ZBAR_CFG_ENABLE, 1);
    int width = img.cols;  
    int height = img.rows;  
    uchar *raw = (uchar *)img.data;
    Image image(width, height, "Y800", raw, width * height);
    scanner.scan(image);
    SymbolSet symbols = image.get_symbols();
    for(Image::SymbolIterator symbol = image.symbol_begin(); symbol != image.symbol_end(); symbol++)
    {
        string data = symbol->get_data();
        vector<Point> vp;
        int n = symbol->get_location_size();  
      for(int i=0;i<n;i++)
        {  
         vp.push_back(Point(symbol->get_location_x(i),symbol->get_location_y(i))); 
      }  
      RotatedRect r = minAreaRect(vp);
        *angle = r.angle;
        return data;
    }
    return "";
}

但是代码什么也找不到。我在img上使用imwrite检查了参数，图像是正确且非常清晰的(它是用http://www.qrcode-generator.de/生成的)，谁能告诉我，问题出在哪里？

Answer 1

好吧，我自己解决了它，不得不把它转换成灰度：

Mat gray;
cvtColor(img,gray,CV_BGR2GRAY);
uchar *raw = (uchar *)gray.data;