RecognizeVehicleRegistration_文字识别_API文档

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接口说明

本接口适用场景

  • 阿里云机动车注册登记证识别,是阿里云官方自研 OCR 文字识别产品,适用于识别机动车注册证所包含的证件类型、编号、机动车所有人、登记机关、登记日期等关键信息的场景。
  • 阿里云 OCR 产品基于阿里巴巴达摩院强大的 AI 技术及海量数据,历经多年沉淀打磨,具有服务稳定、操作简易、实时性高、能力全面等几大优势。
  • 本接口图片示例

本接口核心能力

分类概述
图像增强默认支持图像增强,包括图像自动旋转、畸变自动矫正、模糊图片自动增强等能力。
多类型覆盖支持模糊、光照不均、透视畸变、任意背景等低质量图像识别。
高精度识别总体识别准确率可达 98%。

如何使用本接口

步骤概述
1开通 车辆物流识别 服务。开通服务前后,您可以通过体验馆免费体验本功能识别效果。
2购买车辆物流识别资源包。本 API 会赠送免费额度,可使用免费额度测试。您也可以不购买资源包,系统会通过“按量付费”方式按实际调用量自动扣款。
3可以参照调试页面提供的代码示例完成 API 接入开发。接入完成后,调用 API 获取识别结果。如果使用子账号调用接口,需要阿里云账号(主账号)对 RAM 账号进行授权。创建 RAM 用户的具体操作,请参考:创建 RAM 用户。文字识别服务提供一种系统授权策略,即 AliyunOCRFullAccess。具体授权操作,请参见在用户页面为 RAM 用户授权。

重要提示

类型概述
图片格式
  • 本接口支持:PNG、JPG、JPEG、BMP、GIF、TIFF、WebP。暂不支持 PDF 格式。
图片尺寸
  • 图片长宽需要大于 15 像素,小于 8192 像素。
  • 长宽比需要小于 50。
  • 如需达到较好识别效果,建议长宽均大于 500px。
  • 图片尺寸过小,会影响识别精度。图片内单字大小在 10-50px 内时,识别效果较好。
图片大小
  • 图片二进制文件不能超过 10MB。
  • 图片过大会影响接口响应速度,建议使用小于 1.5M 图片进行识别,且通过传图片 URL 的方式调用接口。
其他提示
  • 本能力会自动处理反光、扭曲等干扰信息,但会影响精度。请尽量选择清晰度高、无反光、无扭曲的图片。
相关能力

流控信息

当前云产品API请求速率暂未透出。

授权信息

如下是此API对应的授权信息,用于RAM权限策略语句的Action元素中,为RAM用户或RAM角色授予调用此API的权限。请通过 RAM 访问控制设置,使用方法可参考访问控制帮助文档

具体说明如下:展开详情

操作访问级别资源类型条件关键字关联操作
ocr:RecognizeVehicleRegistration
Get
全部资源
*

请求参数

字段名称字段详情
Urlstring
  • 本字段和 body 字段二选一,不可同时透传或同时为空。展开详情
示例值:https://img.alicdn.com/imgextra/i1/O1CN01NA1F7A1cSO8cnFQ7m_!!6000000003599-0-tps-844-1125.jpg字符长度 <= 2048
bodystring<binary>
  • 本字段和 URL 字段二选一,不可同时透传或同时为空。展开详情
示例值:图片二进制

返回参数

字段名称字段详情
RequestIdstring

请求唯一 ID

示例值:43A29C77-405E-4CC0-BC55-EE694AD00655
Datastring

返回数据

示例值:{"codes":[{"data":"310007798232","points":[{"x":502,"y":6},{"x":768,"y":6},{"x":768,"y":52},{"x":502,"y":52}],"type":"Codabar"}],"data":{"barCode":"310007798232","vehicleOwnerInfo":"某某某限有限公司/统一社会信用代码/12345678682296194","registrationAuthority":"上海市公安局交通警察总队车辆管理所","registrationDate":"2021-04-28","registrationNumber":"沪AG12345","vehicleType":"小型轿车","vehicleBrand":"大众汽车牌","vehicleModel":"SVW7142BPV","vehicleColor":"","vinCode":"LSVCY6C49MN027789","isDomestic":"国产","engineNumber":"035154","engineType":"DUK","fuelType":"混合动力","displacement":"1395","power":"110","manufactureName":"上汽大众汽车有限公司","steeringForm":"方向盘","frontWheelTrack":"1584","rearWheelTrack":"1570","tireNumber":"4","tireSize":"215/60R1695V","springNumber":"","wheelbase":"2871","axleNumber":"2","overallDimension":"4948×1836×1469","containerDimension":"","totalWeight":"2190","permittedWeight":"","passengerCapacity":"","tractionWeight":"","cabPassengerCapacity":"","useNature":"租赁","acquisitionMethod":"购买","manufactureDate":"2021-03-16","issueAuthority":"上海市公安局交通警察总队","issueDate":"2021-04-28"},"ftype":0,"height":1125,"orgHeight":1125,"orgWidth":844,"prism_keyValueInfo":[{"key":"barCode","keyProb":96,"value":"310007798232","valuePos":[{"x":545,"y":45},{"x":735,"y":42},{"x":736,"y":53},{"x":545,"y":55}],"valueProb":96},{"key":"vehicleOwnerInfo","keyProb":100,"value":"某某某限有限公司/统一社会信用代码/12345678682296194","valuePos":[{"x":317,"y":70},{"x":723,"y":68},{"x":723,"y":84},{"x":318,"y":87}],"valueProb":100},{"key":"registrationAuthority","keyProb":100,"value":"上海市公安局交通警察总队车辆管理所","valuePos":[{"x":165,"y":89},{"x":369,"y":87},{"x":370,"y":112},{"x":166,"y":114}],"valueProb":100},{"key":"registrationDate","keyProb":100,"value":"2021-04-28","valuePos":[{"x":463,"y":93},{"x":538,"y":92},{"x":538,"y":104},{"x":464,"y":106}],"valueProb":100},{"key":"registrationNumber","keyProb":100,"value":"沪AG12345","valuePos":[{"x":733,"y":93},{"x":733,"y":107},{"x":669,"y":107},{"x":669,"y":93}],"valueProb":100},{"key":"vehicleType","keyProb":84,"value":"小型轿车","valuePos":[{"x":262,"y":588},{"x":262,"y":603},{"x":205,"y":603},{"x":205,"y":588}],"valueProb":84},{"key":"vehicleBrand","keyProb":100,"value":"大众汽车牌","valuePos":[{"x":569,"y":606},{"x":570,"y":592},{"x":643,"y":594},{"x":642,"y":608}],"valueProb":100},{"key":"vehicleModel","keyProb":99,"value":"SVW7142BPV","valuePos":[{"x":277,"y":616},{"x":277,"y":630},{"x":206,"y":630},{"x":206,"y":616}],"valueProb":99},{"key":"vehicleColor","keyProb":77,"value":"","valuePos":[{"x":585,"y":620},{"x":585,"y":635},{"x":569,"y":635},{"x":569,"y":620}],"valueProb":77},{"key":"vinCode","keyProb":100,"value":"LSVCY6C49MN027789","valuePos":[{"x":324,"y":645},{"x":324,"y":659},{"x":204,"y":659},{"x":204,"y":645}],"valueProb":100},{"key":"isDomestic","keyProb":96,"value":"国产","valuePos":[{"x":568,"y":662},{"x":569,"y":649},{"x":599,"y":650},{"x":599,"y":664}],"valueProb":96},{"key":"engineNumber","keyProb":100,"value":"035154","valuePos":[{"x":203,"y":686},{"x":204,"y":671},{"x":250,"y":672},{"x":250,"y":688}],"valueProb":100},{"key":"engineType","keyProb":100,"value":"DUK","valuePos":[{"x":594,"y":678},{"x":594,"y":692},{"x":568,"y":692},{"x":568,"y":678}],"valueProb":100},{"key":"fuelType","keyProb":100,"value":"混合动力","valuePos":[{"x":260,"y":702},{"x":260,"y":717},{"x":204,"y":717},{"x":204,"y":702}],"valueProb":100},{"key":"displacement","keyProb":100,"value":"1395","valuePos":[{"x":600,"y":707},{"x":600,"y":722},{"x":569,"y":722},{"x":569,"y":707}],"valueProb":100},{"key":"power","keyProb":100,"value":"110","valuePos":[{"x":687,"y":708},{"x":687,"y":723},{"x":663,"y":723},{"x":663,"y":708}],"valueProb":100},{"key":"manufactureName","keyProb":100,"value":"上汽大众汽车有限公司","valuePos":[{"x":342,"y":731},{"x":342,"y":746},{"x":205,"y":746},{"x":205,"y":731}],"valueProb":100},{"key":"steeringForm","keyProb":100,"value":"方向盘","valueProb":100},{"key":"frontWheelTrack","keyProb":100,"value":"1584","valuePos":[{"x":252,"y":760},{"x":252,"y":774},{"x":222,"y":774},{"x":222,"y":760}],"valueProb":100},{"key":"rearWheelTrack","keyProb":100,"value":"1570","valuePos":[{"x":370,"y":761},{"x":370,"y":775},{"x":340,"y":775},{"x":340,"y":761}],"valueProb":100},{"key":"tireNumber","keyProb":100,"value":"4","valuePos":[{"x":580,"y":766},{"x":580,"y":781},{"x":568,"y":781},{"x":568,"y":766}],"valueProb":100},{"key":"tireSize","keyProb":100,"value":"215/60R1695V","valuePos":[{"x":302,"y":788},{"x":302,"y":803},{"x":203,"y":803},{"x":203,"y":788}],"valueProb":100},{"key":"springNumber","keyProb":100,"value":"","valueProb":100},{"key":"wheelbase","keyProb":100,"value":"2871","valuePos":[{"x":232,"y":817},{"x":232,"y":831},{"x":202,"y":831},{"x":202,"y":817}],"valueProb":100},{"key":"axleNumber","keyProb":92,"value":"2","valuePos":[{"x":578,"y":825},{"x":578,"y":839},{"x":569,"y":839},{"x":569,"y":825}],"valueProb":92},{"key":"overallDimension","keyProb":100,"value":"4948×1836×1469","valuePos":[{"x":221,"y":857},{"x":222,"y":845},{"x":475,"y":850},{"x":474,"y":862}],"valueProb":100},{"key":"containerDimension","keyProb":100,"value":"","valueProb":100},{"key":"totalWeight","keyProb":100,"value":"2190","valuePos":[{"x":232,"y":904},{"x":232,"y":918},{"x":203,"y":918},{"x":203,"y":904}],"valueProb":100},{"key":"permittedWeight","keyProb":100,"value":"","valueProb":100},{"key":"passengerCapacity","keyProb":100,"value":"","valueProb":100},{"key":"tractionWeight","keyProb":100,"value":"","valueProb":100},{"key":"cabPassengerCapacity","keyProb":100,"value":"","valueProb":100},{"key":"useNature","keyProb":97,"value":"租赁","valuePos":[{"x":487,"y":968},{"x":487,"y":984},{"x":457,"y":984},{"x":457,"y":968}],"valueProb":97},{"key":"acquisitionMethod","keyProb":100,"value":"购买","valuePos":[{"x":230,"y":992},{"x":230,"y":1008},{"x":200,"y":1008},{"x":200,"y":992}],"valueProb":100},{"key":"manufactureDate","keyProb":100,"value":"2021-03-16","valuePos":[{"x":455,"y":1012},{"x":456,"y":999},{"x":529,"y":1000},{"x":529,"y":1013}],"valueProb":100},{"key":"issueAuthority","keyProb":100,"value":"上海市公安局交通警察总队","valuePos":[{"x":684,"y":895},{"x":684,"y":980},{"x":599,"y":980},{"x":599,"y":895}],"valueProb":100},{"key":"issueDate","keyProb":100,"value":"2021-04-28","valuePos":[{"x":642,"y":1018},{"x":642,"y":1002},{"x":719,"y":1007},{"x":718,"y":1022}],"valueProb":100}],"sliceRect":{"x0":23,"y0":44,"x1":795,"y1":38,"x2":793,"y2":1124,"x3":12,"y3":1106},"width":844}
Codestring

错误码(如果识别成功,不会返回此字段)

示例值:noPermission
Messagestring

错误提示(如果识别成功,不会返回此字段)

示例值:You are not authorized to perform this operation.

返回说明

返回参数说明


字段类型说明
dataobject结构化信息。
prism_keyValueInfolist结构化信息的坐标信息。
ftypeint是否为复印件(1:是,0:否)。
codeslist二维码信息。
sliceRectlist检测出的子图坐标信息。
heightint算法矫正图片后的高度。
widthint算法矫正图片后的宽度。
orgHeightint原图的高度。
orgWidthint原图的宽度。

结构化信息(data 字段)

字段类型说明
acquisitionMethodstring车辆获得方式。
axleNumberstring轴数。
barCodestring条形编号。
cabPassengerCapacitystring驾驶室载客。
containerDimensionstring货箱内部尺寸。
displacementstring排量。
engineNumberstring发动机号。
engineTypestring发动机型号。
frontWheelTrackstring轮距前。
fuelTypestring燃料种类。
isDomesticstring国产/进口。
issueAuthoritystring发证机关。
issueDatestring发证日期。
manufactureDatestring车辆出厂日期。
manufactureNamestring制造厂名称。
overallDimensionstring外轮廓尺寸。
passengerCapacitystring核定载客。
permittedWeightstring核定载质量。
powerstring功率。
rearWheelTrackstring轮距后。
registrationAuthoritystring登记机关。
registrationDatestring登记日期。
registrationNumberstring机动车登记编号。
springNumberstring钢板弹簧数。
steeringFormstring转向形式。
tireNumberstring轮胎数。
tireSizestring轮胎规格。
totalWeightstring总质量。
tractionWeightstring准牵引总质量。
useNaturestring使用性质。
vehicleBrandstring车辆品牌。
vehicleColorstring车身颜色。
vehicleModelstring车辆型号。
vehicleOwnerInfostring机动车所有人/身份证明名称/号码。
vehicleTypestring车辆类型。
vinCodestring车辆识别代号/车架号。
wheelbasestring轴距。

结构化坐标信息(prism_keyValueInfo 字段)

字段类型说明
keystring识别出的字段名称。
keyProbint字段名称置信度。
valuestring识别出的字段名称对应的值。
valueProbint字段名称对应值的置信度。
valuePoslist字段在算法矫正后的图片中的四个点坐标(左上、右上、右下、左下)。

二维码信息(codes 字段)

字段类型说明
datastring二维码地址。
typestring二维码类型。
pointslist二维码四个点坐标(左上、右上、右下、左下)。

返回示例

变更历史

变更时间变更内容概要操作
2022-11-25
变更请求参数Url

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