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更新时间：2024-04-19 GMT+08:00

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车辆合格证识别

功能介绍

识别车辆合格证中的文字信息，并返回识别的结构化结果。

约束与限制

只支持中国大陆车辆合格证的识别。
只支持识别PNG、JPG、JPEG、BMP、TIFF格式的图片。
图像各边的像素大小在15到8192px之间。
图像中识别区域有效占比超过80%，保证整张车辆合格证内容及其边缘包含在图像内。
支持图像中车辆合格证任意角度的水平旋转。
支持少量扭曲，扭曲后图像中的车辆合格证长宽比与实际驾驶证相差不超过10%。
能处理暗光等干扰的图片但影响识别精度。
文字识别服务属于公有云服务，线上用户资源共享，如果需要多并发请求，请提前联系我们。

调用方法

请参见如何调用API。

前提条件

在使用之前，需要您完成服务申请和认证鉴权，具体操作流程请参见开通服务和认证鉴权章节。

用户首次使用需要先申请开通。服务只需要开通一次即可，后面使用时无需再次申请。如未开通服务，调用服务时会提示ModelArts.4204报错，请在调用服务前先进入控制台开通服务，并注意开通服务区域与调用服务的区域保持一致。

URI

POST /v2/{project_id}/ocr/vehicle-certificate

表1 路径参数
参数	是否必选	说明
endpoint	是	终端节点，即调用API的请求地址。不同服务不同区域的endpoint不同，您可以从终端节点中获取。例如，OCR服务在“华北-北京四”区域的“endpoint”为“ocr.cn-north-4.myhuaweicloud.com”。
project_id	是	项目ID，您可以从获取项目ID中获取。

请求参数

表2 请求Header参数
参数	是否必选	参数类型	描述
X-Auth-Token	是	String	用户Token。用于获取操作API的权限。获取Token接口响应消息头中X-Subject-Token的值即为Token。
Enterprise-Project-Id	否	String	企业项目ID。OCR支持通过企业项目管理（EPS）对不同用户组和用户的资源使用，进行分账。获取方法：进入“企业项目管理”页面，单击企业项目名称，在企业项目详情页获取Enterprise-Project-Id（企业项目ID）。企业项目创建步骤请参见用户指南。说明：创建企业项目后，在传参时，有以下三类场景。携带正确的ID，正常使用OCR服务，账单归到企业ID对应的企业项目中。携带错误的ID，正常使用OCR服务，账单的企业项目会被分类为“未归集”。不携带ID，正常使用OCR服务，账单的企业项目会被分类为“未归集”。

表3 请求Body参数
参数	是否必选	参数类型	描述
image	否	String	与url二选一。图像数据，base64编码，要求base64编码后大小不超过10M。图片最小边不小于15像素，最长边不超过8192像素。支持JPG/PNG/BMP/TIFF格式。图片Base64编码示例如/9j/4AAQSkZJRgABAg...，带有多余前缀会产生The image format is not supported报错。
url	否	String	与image二选一。图片的URL路径，目前仅支持华为云上OBS提供的匿名公开授权访问的URL以及公网URL。说明：接口响应时间依赖于图片的下载时间，如果图片下载时间过长，会返回接口调用失败。请保证被检测图片所在的存储服务稳定可靠，推荐使用OBS服务存储图片数据。
return_text_location	否	Boolean	识别到的文字块的区域位置信息。可选值包括： true：返回各个文字块区域 false：不返回各个文字块区域如果无该参数，系统默认不返回文字块区域。如果输入参数不是Boolean类型，则会报非法参数错误。

响应参数

状态码： 200

表4 响应Body参数
参数	参数类型	描述
result	VehicleCertificateResult object	调用成功时表示调用结果。调用失败时无此字段。

表5 VehicleCertificateResult
参数	参数类型	描述
certificate_number	String	合格证编号。
issue_date	String	发证日期。
manufacture_name	String	车辆制造企业名称。
vehicle_brand	String	车辆品牌。
vehicle_name	String	车辆名称。
vehicle_model	String	车辆型号。
vin	String	车架号。
vehicle_color	String	车身颜色。
chassis_model	String	底盘型号。
chassis_id	String	底盘ID。
chassis_certificate_number	String	底盘合格证编号。
engine_model	String	发动机型号。
engine_number	String	发动机号。
fuel_type	String	燃料种类。
displacement	String	排量。
power	String	功率。
emission_standard	String	排放标准。
fuel_consumption	String	油耗。
overall_dimension_length	String	外廓尺寸-长。
overall_dimension_width	String	外廓尺寸-宽。
overall_dimension_height	String	外廓尺寸-高。
container_dimension_length	String	货厢内部尺寸-长。
container_dimension_width	String	货厢内部尺寸-宽。
container_dimension_height	String	货厢内部尺寸-高。
spring_quantity	String	钢板弹簧片数。
tire_quantity	String	轮胎数。
tire_size	String	轮胎规格。
front_wheel_track	String	轮距-前。
rear_wheel_track	String	轮距-后。
wheelbase	String	轴距。
axle_load	String	轴荷。
axle_quantity	String	轴数。
steering_form	String	转向形式。
total_weight	String	总质量。
equipment_weight	String	整备质量。
maximum_laden_mass	String	额定载质量。
mass_utilization_coefficient	String	载质量利用系数。
traction_weight	String	准牵引总质量。
maximum_load_mass	String	半挂车鞍座最大允许总质量。
cab_passenger_capacity	String	驾驶室准乘人数。
passenger_capacity	String	额定载客。
max_design_speed	String	最高设计车速。
manufacture_date	String	车辆制造日期。
confidence	Object	字段的置信度，取值范围0~1。置信度越大，本次识别的字段的可靠性越高，在统计意义上，置信度越大，准确率越高。置信度由算法给出，不直接等价于字段的准确率。
text_location	Object	对应所有在原图上识别到的字段位置信息，包含所有文字区域四个顶点的二维坐标（x,y）。采用图像坐标系，坐标原点为图片左上角，x轴沿水平方向，y轴沿竖直方向。

状态码： 400

表6 响应Body参数
参数	参数类型	描述
error_code	String	调用失败时的错误码，具体请参见错误码。调用成功时不返回此字段。
error_msg	String	调用失败时的错误信息。调用成功时无此字段。

请求示例

Endpoint即调用API的请求地址，不同服务不同区域的Endpoint不同，具体请参见终端节点。例如，车辆合格证识别服务部署在“华北-北京四”区域的“endpoint”为“ocr.cn-north-4.myhuaweicloud.com”，请求URL为“https://ocr.cn-north-4.myhuaweicloud.com/v2/{project_id}/ocr/vehicle-certificate”，“project_id”为项目ID，获取方法请参见获取项目ID。
如何获取Token请参见认证鉴权。

传入车辆合格证图片的base64编码进行文字识别

POST https://{endpoint}/v2/{project_id}/ocr/vehicle-certificate

{
  "image" : "/9j/4AAQSkZJRgABAgEASABIAAD/4RFZRXhpZgAATU0AKgAAAA..."
}

传入车辆合格证图片的url进行文字识别

POST https://{endpoint}/v2/{project_id}/ocr/vehicle-certificate

{
  "url" : "https://BucketName.obs.myhuaweicloud.com/ObjectName"
}

响应示例

状态码： 200

成功响应示例

{
  "result" : {
    "certificate_number" : "WAS1xxxx2399503",
    "issue_date" : "2022年10月23日",
    "manufacture_name" : "xxxx汽车有限公司",
    "vehicle_brand" : "xxx牌/xxx",
    "vehicle_name" : "轿车",
    "vehicle_model" : "TV7xxxxx",
    "vin" : "LFMAYxxxxxxx92063",
    "vehicle_color" : "白",
    "chassis_model" : "x",
    "chassis_id" : "x",
    "chassis_certificate_number" : "x",
    "engine_model" : "9NR",
    "engine_number" : "A2853xx",
    "fuel_type" : "汽油",
    "displacement" : "x197",
    "power" : "xx",
    "emission_standard" : "GBXXXXX-XXXX",
    "fuel_consumption" : "xx",
    "overall_dimension_length" : "xx35",
    "overall_dimension_width" : "17xx",
    "overall_dimension_height" : "14xx",
    "container_dimension_length" : "x",
    "container_dimension_width" : "x",
    "container_dimension_height" : "x",
    "spring_quantity" : "xx",
    "tire_quantity" : "x",
    "tire_size" : "XXXXX.X",
    "front_wheel_track" : "xx27",
    "rear_wheel_track" : "xx26",
    "wheelbase" : "27xx",
    "axle_load" : "xxx/830",
    "axle_quantity" : "x",
    "steering_form" : "方向盘",
    "total_weight" : "xx70",
    "equipment_weight" : "xx40",
    "maximum_laden_mass" : "x",
    "mass_utilization_coefficient" : "x",
    "traction_weight" : "x",
    "maximum_load_mass" : "x",
    "cab_passenger_capacity" : "x",
    "passenger_capacity" : "x",
    "max_design_speed" : "xxx",
    "manufacture_date" : "2022年10月xxx日",
    "confidence" : {
      "certificate_number" : 0.9856,
      "issue_date" : 0.9931,
      "manufacture_name" : 0.9485,
      "vehicle_brand" : 0.9612,
      "vehicle_name" : 0.9562,
      "vehicle_model" : 0.9741,
      "vin" : 0.9963,
      "vehicle_color" : 0.9645,
      "chassis_model" : 0,
      "chassis_id" : 0,
      "chassis_certificate_number" : 0,
      "engine_model" : 0.9745,
      "engine_number" : 0.9384,
      "fuel_type" : 0.9845,
      "displacement" : 0.9954,
      "power" : 0.9861,
      "emission_standard" : 0.9864,
      "fuel_consumption" : 0.9952,
      "overall_dimension_length" : 0.9995,
      "overall_dimension_width" : 0.9996,
      "overall_dimension_height" : 0.9982,
      "container_dimension_length" : 0,
      "container_dimension_width" : 0,
      "container_dimension_height" : 0,
      "spring_quantity" : 0,
      "tire_quantity" : 0.9984,
      "tire_size" : 0.9631,
      "front_wheel_track" : 0.9815,
      "rear_wheel_track" : 0.9951,
      "wheelbase" : 0.9762,
      "axle_load" : 0.9978,
      "axle_quantity" : 0.9982,
      "steering_form" : 0.9946,
      "total_weight" : 0.9863,
      "equipment_weight" : 0.9975,
      "maximum_laden_mass" : 0,
      "mass_utilization_coefficient" : 0,
      "traction_weight" : 0,
      "maximum_load_mass" : 0,
      "cab_passenger_capacity" : 0,
      "passenger_capacity" : 0.9992,
      "max_design_speed" : 0.9999,
      "manufacture_date" : 0.9856
    }
  }
}

状态码： 400

失败响应样例

{
  "error_code" : "AIS.0103",
  "error_msg" : "The image size does not meet the requirements."
}

SDK代码示例

SDK代码示例如下。

传入车辆合格证图片的base64编码进行文字识别

        
         
           
           
             package com.huaweicloud.sdk.test;

import com.huaweicloud.sdk.core.auth.ICredential;
import com.huaweicloud.sdk.core.auth.BasicCredentials;
import com.huaweicloud.sdk.core.exception.ConnectionException;
import com.huaweicloud.sdk.core.exception.RequestTimeoutException;
import com.huaweicloud.sdk.core.exception.ServiceResponseException;
import com.huaweicloud.sdk.ocr.v1.region.OcrRegion;
import com.huaweicloud.sdk.ocr.v1.*;
import com.huaweicloud.sdk.ocr.v1.model.*;


public class RecognizeVehicleCertificateSolution {

    public static void main(String[] args) {
        // The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security.
        // In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment
        String ak = System.getenv("CLOUD_SDK_AK");
        String sk = System.getenv("CLOUD_SDK_SK");

        ICredential auth = new BasicCredentials()
                .withAk(ak)
                .withSk(sk);

        OcrClient client = OcrClient.newBuilder()
                .withCredential(auth)
                .withRegion(OcrRegion.valueOf("<YOUR REGION>"))
                .build();
        RecognizeVehicleCertificateRequest request = new RecognizeVehicleCertificateRequest();
        VehicleCertificateRequestBody body = new VehicleCertificateRequestBody();
        body.withImage("/9j/4AAQSkZJRgABAgEASABIAAD/4RFZRXhpZgAATU0AKgAAAA...");
        request.withBody(body);
        try {
            RecognizeVehicleCertificateResponse response = client.recognizeVehicleCertificate(request);
            System.out.println(response.toString());
        } catch (ConnectionException e) {
            e.printStackTrace();
        } catch (RequestTimeoutException e) {
            e.printStackTrace();
        } catch (ServiceResponseException e) {
            e.printStackTrace();
            System.out.println(e.getHttpStatusCode());
            System.out.println(e.getRequestId());
            System.out.println(e.getErrorCode());
            System.out.println(e.getErrorMsg());
        }
    }
}

            

          

        
       

传入车辆合格证图片的url进行文字识别

        
         
           
           
             package com.huaweicloud.sdk.test;

import com.huaweicloud.sdk.core.auth.ICredential;
import com.huaweicloud.sdk.core.auth.BasicCredentials;
import com.huaweicloud.sdk.core.exception.ConnectionException;
import com.huaweicloud.sdk.core.exception.RequestTimeoutException;
import com.huaweicloud.sdk.core.exception.ServiceResponseException;
import com.huaweicloud.sdk.ocr.v1.region.OcrRegion;
import com.huaweicloud.sdk.ocr.v1.*;
import com.huaweicloud.sdk.ocr.v1.model.*;


public class RecognizeVehicleCertificateSolution {

    public static void main(String[] args) {
        // The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security.
        // In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment
        String ak = System.getenv("CLOUD_SDK_AK");
        String sk = System.getenv("CLOUD_SDK_SK");

        ICredential auth = new BasicCredentials()
                .withAk(ak)
                .withSk(sk);

        OcrClient client = OcrClient.newBuilder()
                .withCredential(auth)
                .withRegion(OcrRegion.valueOf("<YOUR REGION>"))
                .build();
        RecognizeVehicleCertificateRequest request = new RecognizeVehicleCertificateRequest();
        VehicleCertificateRequestBody body = new VehicleCertificateRequestBody();
        body.withUrl("https://BucketName.obs.myhuaweicloud.com/ObjectName");
        request.withBody(body);
        try {
            RecognizeVehicleCertificateResponse response = client.recognizeVehicleCertificate(request);
            System.out.println(response.toString());
        } catch (ConnectionException e) {
            e.printStackTrace();
        } catch (RequestTimeoutException e) {
            e.printStackTrace();
        } catch (ServiceResponseException e) {
            e.printStackTrace();
            System.out.println(e.getHttpStatusCode());
            System.out.println(e.getRequestId());
            System.out.println(e.getErrorCode());
            System.out.println(e.getErrorMsg());
        }
    }
}

            

          

        
       

传入车辆合格证图片的base64编码进行文字识别

        
         
           
           
             # coding: utf-8

from huaweicloudsdkcore.auth.credentials import BasicCredentials
from huaweicloudsdkocr.v1.region.ocr_region import OcrRegion
from huaweicloudsdkcore.exceptions import exceptions
from huaweicloudsdkocr.v1 import *

if __name__ == "__main__":
    # The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security.
    # In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment
    ak = os.getenv("CLOUD_SDK_AK")
    sk = os.getenv("CLOUD_SDK_SK")

    credentials = BasicCredentials(ak, sk) \

    client = OcrClient.new_builder() \
        .with_credentials(credentials) \
        .with_region(OcrRegion.value_of("<YOUR REGION>")) \
        .build()

    try:
        request = RecognizeVehicleCertificateRequest()
        request.body = VehicleCertificateRequestBody(
            image="/9j/4AAQSkZJRgABAgEASABIAAD/4RFZRXhpZgAATU0AKgAAAA..."
        )
        response = client.recognize_vehicle_certificate(request)
        print(response)
    except exceptions.ClientRequestException as e:
        print(e.status_code)
        print(e.request_id)
        print(e.error_code)
        print(e.error_msg)

            

          

        
       

传入车辆合格证图片的url进行文字识别

        
         
           
           
             # coding: utf-8

from huaweicloudsdkcore.auth.credentials import BasicCredentials
from huaweicloudsdkocr.v1.region.ocr_region import OcrRegion
from huaweicloudsdkcore.exceptions import exceptions
from huaweicloudsdkocr.v1 import *

if __name__ == "__main__":
    # The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security.
    # In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment
    ak = os.getenv("CLOUD_SDK_AK")
    sk = os.getenv("CLOUD_SDK_SK")

    credentials = BasicCredentials(ak, sk) \

    client = OcrClient.new_builder() \
        .with_credentials(credentials) \
        .with_region(OcrRegion.value_of("<YOUR REGION>")) \
        .build()

    try:
        request = RecognizeVehicleCertificateRequest()
        request.body = VehicleCertificateRequestBody(
            url="https://BucketName.obs.myhuaweicloud.com/ObjectName"
        )
        response = client.recognize_vehicle_certificate(request)
        print(response)
    except exceptions.ClientRequestException as e:
        print(e.status_code)
        print(e.request_id)
        print(e.error_code)
        print(e.error_msg)

            

          

        
       

传入车辆合格证图片的base64编码进行文字识别

        
         
           
           
             package main

import (
	"fmt"
	"github.com/huaweicloud/huaweicloud-sdk-go-v3/core/auth/basic"
    ocr "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/ocr/v1"
	"github.com/huaweicloud/huaweicloud-sdk-go-v3/services/ocr/v1/model"
    region "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/ocr/v1/region"
)

func main() {
    // The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security.
    // In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment
    ak := os.Getenv("CLOUD_SDK_AK")
    sk := os.Getenv("CLOUD_SDK_SK")

    auth := basic.NewCredentialsBuilder().
        WithAk(ak).
        WithSk(sk).
        Build()

    client := ocr.NewOcrClient(
        ocr.OcrClientBuilder().
            WithRegion(region.ValueOf("<YOUR REGION>")).
            WithCredential(auth).
            Build())

    request := &model.RecognizeVehicleCertificateRequest{}
	imageVehicleCertificateRequestBody:= "/9j/4AAQSkZJRgABAgEASABIAAD/4RFZRXhpZgAATU0AKgAAAA..."
	request.Body = &model.VehicleCertificateRequestBody{
		Image: &imageVehicleCertificateRequestBody,
	}
	response, err := client.RecognizeVehicleCertificate(request)
	if err == nil {
        fmt.Printf("%+v\n", response)
    } else {
        fmt.Println(err)
    }
}

            

          

        
       

传入车辆合格证图片的url进行文字识别

        
         
           
           
             package main

import (
	"fmt"
	"github.com/huaweicloud/huaweicloud-sdk-go-v3/core/auth/basic"
    ocr "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/ocr/v1"
	"github.com/huaweicloud/huaweicloud-sdk-go-v3/services/ocr/v1/model"
    region "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/ocr/v1/region"
)

func main() {
    // The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security.
    // In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment
    ak := os.Getenv("CLOUD_SDK_AK")
    sk := os.Getenv("CLOUD_SDK_SK")

    auth := basic.NewCredentialsBuilder().
        WithAk(ak).
        WithSk(sk).
        Build()

    client := ocr.NewOcrClient(
        ocr.OcrClientBuilder().
            WithRegion(region.ValueOf("<YOUR REGION>")).
            WithCredential(auth).
            Build())

    request := &model.RecognizeVehicleCertificateRequest{}
	urlVehicleCertificateRequestBody:= "https://BucketName.obs.myhuaweicloud.com/ObjectName"
	request.Body = &model.VehicleCertificateRequestBody{
		Url: &urlVehicleCertificateRequestBody,
	}
	response, err := client.RecognizeVehicleCertificate(request)
	if err == nil {
        fmt.Printf("%+v\n", response)
    } else {
        fmt.Println(err)
    }
}

            

          

        
       

更多编程语言的SDK代码示例，请参见API Explorer的代码示例页签，可生成自动对应的SDK代码示例。

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状态码请参见状态码。

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