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更新时间:2024-04-19 GMT+08:00

缅文驾驶证识别

功能介绍

识别缅甸驾驶证中的文字信息,并以JSON格式返回识别的结构化结果。该接口的使用限制请参见约束与限制,详细使用指导请参见OCR服务使用简介章节。

图1 缅文驾驶证示例图

约束与限制

  • 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4096px之间。
  • 目前只支持单张缅文驾驶证正面识别。
  • 支持图像中缅文驾驶证任意角度的水平旋转。
  • 支持少量扭曲,扭曲后图像中的驾驶证长宽比与实际驾驶证相差不超过10%。
  • 能处理反光、暗光等干扰的图片但影响识别精度。

调用方法

请参见如何调用API

前提条件

在使用缅文驾驶证识别之前,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/myanmar-driver-license

表1 路径参数

参数

是否必选

说明

endpoint

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。

project_id

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

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。

Content-Type

String

发送的实体的MIME类型,参数值为“application/json”。

Enterprise-Project-Id

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

说明

image

String

与url二选一。

图片的Base64编码,要求Base64编码后大小不超过10MB。

图片最短边不小于15px,最长边不超过4096px,支持JPEG、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

String

与image二选一。

图片的url路径,目前支持:

  • 公网http/https url
  • OBS提供的url,使用OBS数据需要进行授权。包括对服务授权、临时授权、匿名公开授权,详情参见配置OBS访问权限
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。

convert_unicode

Boolean

输出格式。可选值如下:

  • true:输出为unicode格式。
  • false:输出为zawgyi格式。

如果参数值为空或无该参数,默认输出为zawgyi格式。

响应参数

状态码: 200

表4 响应Body参数

参数

参数类型

描述

result

MyanmarDriverLicenseResult object

调用结果。

调用失败时不返回此字段。

表5 MyanmarDriverLicenseResult

参数

参数类型

描述

card_number

String

缅文驾驶证号。

card_number_en

String

英文驾驶证号。

name

String

缅文名字。

name_en

String

英文名字。

nrc_id

String

缅文nrc号码。

nrc_id_en

String

英文nrc号码。

birth

String

缅文出生日期。

birth_en

String

英文出生日期。

blood_group

String

缅文血型。

blood_group_en

String

英文血型。

expiried_date

String

缅文有效期。

expiried_date_en

String

英文有效期。

confidence

MyanmarDriverLicenseConfidence 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。

表6 MyanmarDriverLicenseConfidence

参数

参数类型

描述

card_number

Float

缅文驾驶证号置信度。

card_number_en

Float

英文驾驶证号置信度。

name

Float

缅文名字置信度。

name_en

Float

英文名字置信度。

nrc_id

Float

缅文nrc号码置信度。

nrc_id_en

Float

英文nrc号码置信度。

birth

Float

缅文出生日期置信度。

birth_en

Float

英文出生日期置信度。

blood_group

Float

缅文血型置信度。

blood_group_en

Float

英文血型置信度。

expiried_date

Float

缅文有效期置信度。

expiried_date_en

Float

英文有效期置信度。

状态码: 400

表7 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

调用失败时返回的错误信息。

调用成功时不返回此字段。

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,缅文驾驶证识别服务部署在“中国-香港”区域的“endpoint”“ocr.ap-southeast-1.myhuaweicloud.com”“ocr.ap-southeast-1.myhuaweicloud.cn”,请求URL为“https://ocr.ap-southeast-1.myhuaweicloud.com/v2/{project_id}/ocr/myanmar-driver-license”“project_id”为项目ID,获取方法请参见获取项目ID

  • 如何获取Token请参见构造请求
  • 请求样例(方式一:使用图片的Base64编码)
    POST https://{endpoint}/v2/{project_id}/ocr/myanmar-driver-license
    
    Request Header:
    Content-Type: application/json
    X-Auth-Token: MIINRwYJKoZIhvcNAQcCoIINODCCDTQCAQExDTALBglghkgBZQMEAgEwgguVBgkqhkiG...
    Request Body: 
    {
       "image":"/9j/4AAQSkZJRgABAgEASABIAAD/4RFZRXhpZgAATU0AKgAAAA...",
       "convert_unicode": true
    }
  • 请求样例(方式二:使用图片URL)
    POST https://{endpoint}/v2/{project_id}/ocr/myanmar-driver-license
    
    Request Header:
    Content-Type: application/json
    X-Auth-Token: MIINRwYJKoZIhvcNAQcCoIINODCCDTQCAQExDTALBglghkgBZQMEAgEwgguVBgkqhkiG...
    Request Body: 
    {
       "url":"https://BucketName.obs.xxxx.com/ObjectName",
       "convert_unicode": true
    }
  • Python3语言请求代码示例(其他语言参照下列示例编写或使用OCR SDK)
    # encoding:utf-8
    
    import requests
    import base64
    
    url = "https://{endpoint}/v2/{project_id}/ocr/myanmar-driver-license"
    token = "用户获取得到的实际token值"
    headers = {'Content-Type': 'application/json', 'X-Auth-Token': token}
    
    imagepath = r'./data/myanmar-driver-license-demo.png' # 读取本地图片
    with open(imagepath, "rb") as bin_data:
        image_data = bin_data.read()
    image_base64 = base64.b64encode(image_data).decode("utf-8")  # 使用图片的Base64编码
    payload = {"image": image_base64}
    response = requests.post(url, headers=headers, json=payload)
    print(response.text)

响应示例

状态码:200

成功响应示例

{
  "result" : {
    "card_number" : "XXXX",
    "card_number_en" : "XXXX",
    "name" : "XXXX",
    "name_en" : "XXXX",
    "nrc_id" : "XXX",
    "nrc_id_en" : "XXX",
    "birth" : "၅-၅-၁၉၉၂",
    "birth_en" : "5-5-1992",
    "blood_group" : "ဘီ",
    "blood_group_en" : "2",
    "expiration_date" : "၁၃-၁-၂၀၂၀",
    "expiration_date_en" : "13-1-2020",
    "confidence" : {
      "card_number" : 0.8252,
      "card_number_en" : 0.8971,
      "name" : 0.985,
      "name_en" : 0.9528,
      "nrc_id" : 0.9972,
      "nrc_id_en" : 0.9993,
      "birth" : 0.9998,
      "birth_en" : 0.8973,
      "blood_group" : 0.6772,
      "blood_group_en" : 0.6721,
      "expiration_date" : 0.9994,
      "expiration_date_en" : 0.758
    }
  }
}

状态码:400

失败响应示例

{
    "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。

  • 传入缅文驾驶证图片的base64编码进行文字识别
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    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 RecognizeMyanmarDriverLicenseSolution {
    
        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();
            RecognizeMyanmarDriverLicenseRequest request = new RecognizeMyanmarDriverLicenseRequest();
            MyanmarDriverLicenseRequestBody body = new MyanmarDriverLicenseRequestBody();
            body.withConvertUnicode(true);
            body.withImage("/9j/4AAQSkZJRgABAgEASABIAAD/4RFZRXhpZgAATU0AKgAAAA...");
            request.withBody(body);
            try {
                RecognizeMyanmarDriverLicenseResponse response = client.recognizeMyanmarDriverLicense(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());
            }
        }
    }
    
  • 传入缅文驾驶证图片的url进行文字识别
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    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 RecognizeMyanmarDriverLicenseSolution {
    
        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();
            RecognizeMyanmarDriverLicenseRequest request = new RecognizeMyanmarDriverLicenseRequest();
            MyanmarDriverLicenseRequestBody body = new MyanmarDriverLicenseRequestBody();
            body.withConvertUnicode(true);
            body.withUrl("https://BucketName.obs.myhuaweicloud.com/ObjectName");
            request.withBody(body);
            try {
                RecognizeMyanmarDriverLicenseResponse response = client.recognizeMyanmarDriverLicense(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());
            }
        }
    }
    
  • 传入缅文驾驶证图片的base64编码进行文字识别
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    # 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 = RecognizeMyanmarDriverLicenseRequest()
            request.body = MyanmarDriverLicenseRequestBody(
                convert_unicode=True,
                image="/9j/4AAQSkZJRgABAgEASABIAAD/4RFZRXhpZgAATU0AKgAAAA..."
            )
            response = client.recognize_myanmar_driver_license(request)
            print(response)
        except exceptions.ClientRequestException as e:
            print(e.status_code)
            print(e.request_id)
            print(e.error_code)
            print(e.error_msg)
    
  • 传入缅文驾驶证图片的url进行文字识别
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    # 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 = RecognizeMyanmarDriverLicenseRequest()
            request.body = MyanmarDriverLicenseRequestBody(
                convert_unicode=True,
                url="https://BucketName.obs.myhuaweicloud.com/ObjectName"
            )
            response = client.recognize_myanmar_driver_license(request)
            print(response)
        except exceptions.ClientRequestException as e:
            print(e.status_code)
            print(e.request_id)
            print(e.error_code)
            print(e.error_msg)
    
  • 传入缅文驾驶证图片的base64编码进行文字识别
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    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.RecognizeMyanmarDriverLicenseRequest{}
    	convertUnicodeMyanmarDriverLicenseRequestBody:= true
    	imageMyanmarDriverLicenseRequestBody:= "/9j/4AAQSkZJRgABAgEASABIAAD/4RFZRXhpZgAATU0AKgAAAA..."
    	request.Body = &model.MyanmarDriverLicenseRequestBody{
    		ConvertUnicode: &convertUnicodeMyanmarDriverLicenseRequestBody,
    		Image: &imageMyanmarDriverLicenseRequestBody,
    	}
    	response, err := client.RecognizeMyanmarDriverLicense(request)
    	if err == nil {
            fmt.Printf("%+v\n", response)
        } else {
            fmt.Println(err)
        }
    }
    
  • 传入缅文驾驶证图片的url进行文字识别
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    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.RecognizeMyanmarDriverLicenseRequest{}
    	convertUnicodeMyanmarDriverLicenseRequestBody:= true
    	urlMyanmarDriverLicenseRequestBody:= "https://BucketName.obs.myhuaweicloud.com/ObjectName"
    	request.Body = &model.MyanmarDriverLicenseRequestBody{
    		ConvertUnicode: &convertUnicodeMyanmarDriverLicenseRequestBody,
    		Url: &urlMyanmarDriverLicenseRequestBody,
    	}
    	response, err := client.RecognizeMyanmarDriverLicense(request)
    	if err == nil {
            fmt.Printf("%+v\n", response)
        } else {
            fmt.Println(err)
        }
    }
    

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