问驾驶证OCR识别,返回的内容与说明文档对不上？

文档(https://cloud.tencent.com/document/product/866/17599)中说明的驾驶证OCR识别返回内容,其中data.items

的字段应该是:姓名,性别,国籍,住址,出生日期,领证日期,准驾车型,起始日期,有效日期;现在测试时,腾讯云接口返回的内容是: {"success":true,"value":{"code":0,"data":{"items":[{"candword":"[]","itemconf":"0.998352348804474","itemstring":"342422199204032356","item":"注册号","itemcoord":{"width":"139","x":"424","y":"342","height":"17"},"words":"[]","coords":"[]"},{"candword":"[]","itemconf":"0.9987858533859252","itemstring":"准驾车型","item":"法定代表人","itemcoord":{"width":"81","x":"178","y":"286","height":"19"},"words":"[]","coords":"[]"},{"candword":"[]","itemconf":"0.9700487852096558","itemstring":"长期","item":"营业期限","itemcoord":{"width":"339","x":"144","y":"59","height":"21"},"words":"[]","coords":"[]"}]},"message":"OK"},"extraInfo":{"type":1}} ;

内容不全,也对不上,连名字都没有? 这个是驾驶证图片url: http://biz-oss-dev.miaogoche.cn/zulin/bizImage/F_FC15302410810000000008_yase_1.jpg?Expires=4702864901&OSSAccessKeyId=LTAIFVdn88UX5oys&Signature=ErV1GoKd6qcKa8bRdei7JUFRQgM%3D ;

请看看怎么回事,是什么原因?

谢谢.