zbarOpencv实现二维码解析.doc

1、zbar + Opencv实现二维码解析下载 windows 下的 zbar 安装包，在vs 中配置好 zbar和 opencv 的 include 和 lib ，输入下面代码即可进行测试：Szbar_image_scanner_t *scanner =zbar_image_scanner_create();/* configure the reader */zbar_image_scanner_set_config(scanner, ZBAR_NONE,ZBAR_CFG_ENABLE, 1);/* obtain image data */ int width = 0, height = 0;

2、 const void *raw = NULL;/如果使用Magick+库，只是在解析图片数据的位置有点差别CvMat *cv_matrix =cvLoadImageM(szPath,CV_LOAD_IMAGE_GRAYSCALE);width = cv_matrix->width; height= cv_matrix->height;raw = (char*)cv_matrix->data.ptr;/* wrap image data */ zbar_image_t *image =zbar_image_create(); zbar_image_set_format(ima

3、ge,*(int*)Y800); zbar_image_set_size(image, width, height);zbar_image_set_data(image, raw, width * height,zbar_image_free_data);/* scan the image for barcodes */ int n =zbar_scan_image(scanner, image); /n = 0 is failed/* extract results */ WCHAR *d; int nd = 0; constzbar_symbol_t *symbol = zbar_imag

4、e_first_symbol(image);for(; symbol; symbol = zbar_symbol_next(symbol) /* dosomething useful with results */ zbar_symbol_type_t typ =zbar_symbol_get_type(symbol);memcpy(info.type,zbar_get_symbol_name(typ),sizeof(info.type) - 1);const char *data = zbar_symbol_get_data(symbol);unsigned int len = zbar_s

5、ymbol_get_data_length(symbol);/printf(decoded %s symbol %sn,zbar_get_symbol_name(typ), data); nd =utf8_to_utf16(BYTE *)data,len,NULL,0); /utf-8转成unicode需要多少字节d = (WCHAR *)malloc(nd * 2) + 2);utf8_to_utf16(BYTE *)data,len,d,nd); /utf-8转成unicodememset(info.data,0,sizeof(info.data);WideCharToMultiByte(CP_ACP,0,d,nd,(CHAR*)info.data,sizeof(info.data) - 1,NULL,NULL); /unicode转ascii free(d); return n;特别注意：如果打开的图像的宽不是4 的倍数，则会解码失败。主要原因是因为opencv打开此类图像时做了行宽的