更新时间:2024-03-22 GMT+08:00
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护照识别

功能介绍

识别护照首页图片中的文字信息,并以JSON格式返回识别的结构化结果。

当前版本支持中国大陆护照的全字段识别。中国-港澳台地区、外国护照支持护照下方两行国际标准化的机读码识别,并可从中提取7个关键字段信息。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 护照示例图

如果图片中包含多张卡证票据,请调用智能分类识别服务。

约束与限制

  • 支持中国大陆护照的全字段识别。
  • 支持含有完整机读码的中国-港澳台地区及外国护照识别。
  • 只支持识别PNG、JPG、JPEG、BMP、TIFF格式图片。
  • 图像各边的像素大小在15px到8192px之间。
  • 图像中护照首页区域有效占比超过25%,保证护照首页内容及其边缘包含在图像内。
  • 支持图像中护照任意角度的水平旋转。
  • 支持少量扭曲,扭曲后图像中的护照长宽比与实际护照相差不超过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开通服务。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/passport

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。

例如,OCR服务在“华北-北京四”区域的“endpoint”“ocr.cn-north-4.myhuaweicloud.com”

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

该参数与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8192px,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

该参数与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。
  • url中不能存在中文字符,若存在,中文需要进行utf8编码。

country_code

String

输入值为护照颁发国的国家码,根据国家码选择对应的护照识别服务。

  • 若输入中未选此字段,服务会根据自己识别判断的护照类型匹配相应的护照识别服务。
  • 若选择值为“GENERAL”,则选择护照机器码识别。
  • 若选择值为“CHN”,则选择中国护照全字段识别。

响应参数

根据识别的结果,可能有不同的HTTP响应状态码(status code)。例如,200表示API调用成功,400表示调用失败,详细的状态码和响应参数说明如下。

状态码: 200

表4 响应Body参数

参数

参数类型

描述

result

PassportResult object

识别结果。

调用失败时不返回此字段。

该结果中包含:13个主要字段,由英文表达;extra_info由本地官方语言表达;主要字段的置信度。置信度越大,字段的值越准确。

表5 PassportResult

参数

参数类型

描述

passport_type

String

护照类型。

  • P:普通因私护照
  • W:外交护照
  • G:公务护照
说明:

该字段仅限中国大陆护照。

country_code

String

护照签发国的国家码。

passport_number

String

护照号码。

nationality

String

护照持有人国籍。
说明:

该字段仅限中国大陆护照。

surname

String

姓。

given_name

String

名字。

sex

String

性别。

date_of_birth

String

出生日期。返回值例如,1990-12-12。

date_of_expiry

String

护照有效期。返回值例如,2020-07-08。

date_of_issue

String

护照签发日期。返回值例如,2010-07-09。
说明:

该字段仅限中国大陆护照。

place_of_birth

String

出生地。
说明:

该字段仅限中国大陆护照。

place_of_issue

String

签发地。
说明:

该字段仅限中国大陆护照。

issuing_authority

String

签发机关。

因为各个领事馆签发机关简写未统一,所以服务统一对中国的英文简写处理为“P.R.China”。例如:有的签发机关是“P.R.C”,识别结果均显示“P.R.China”
说明:

该字段仅限中国大陆护照。

confidence

Object

字段的置信度,取值范围0~1。

置信度越大,表示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。

extra_info

Object

参数值默认为空。对于中国护照,“extra_info”的值会包含护照上由汉字描述的字段信息,如姓名、出生地等信息。
说明:

该字段仅限中国大陆护照。

状态码: 400

表6 响应Body参数

参数

参数类型

说明

error_code

String

调用失败时的错误码,具体请参见错误码

当出现错误码“ModelArts.4204”时,请参考为什么调用API时提示“ModelArts.4204”?章节。

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,护照识别服务部署在“华北-北京四”区域的“endpoint”“ocr.cn-north-4.myhuaweicloud.com或ocr.cn-north-4.myhuaweicloud.cn”,请求URL为“https://ocr.cn-north-4.myhuaweicloud.com/v2/{project_id}/ocr/passport”“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
  • 读取护照图片的base64编码进行文字识别
    POST https://{endpoint}/v2/{project_id}/ocr/passport
    Request Header:
    Content-Type: application/json
    X-Auth-Token: MIINRwYJKoZIhvcNAQcCoIINODCCDTQCAQExDTALBglghkgBZQMEAgEwgguVBgkqhkiG...
    Request Body:
    {
        "image":"/9j/4AAQSkZJRgABAgEASABIAAD/4RFZRXhpZgAATU0AKgAAAA...",
        "country_code": "GENERAL"
    }
  • 读取护照图片的url进行文字识别
    POST https://{endpoint}/v2/{project_id}/ocr/passport
    Request Header:
    Content-Type: application/json
    X-Auth-Token: MIINRwYJKoZIhvcNAQcCoIINODCCDTQCAQExDTALBglghkgBZQMEAgEwgguVBgkqhkiG...
    Request Body:
    {
        "url":"https://BucketName.obs.xxxx.com/ObjectName",
        "country_code": "GENERAL"
    }

响应示例

状态码:200

中国护照

{
    "result": {
        "passport_type": "P", 
        "country_code": "CHN", 
        "passport_number": "ED999XXXX", 
        "nationality": "CHINESE", 
        "surname": "ZHANG", 
        "given_name": "SAN", 
        "sex": "F", 
        "date_of_birth": "1990-12-12", 
        "date_of_expiry": "2020-07-08", 
        "date_of_issue": "2010-07-09", 
        "place_of_birth": "HUNAN", 
        "place_of_issue": "GUANGDONG", 
        "issuing_authority": "MPS Exit & Entry Administration", 
        "extra_info": {
            "local_language": {
                "name": "张三", 
                "sex": "女", 
                "place_of_birth": "湖南", 
                "place_of_issue": "广东", 
                "issuing_authority": "xxx出入境管理局", 
                "nationality": "中国"
            }
        }, 
        "confidence": {
            "passport_type": 0.9987, 
            "country_code": 0.9897, 
            "passport_number": 0.9997, 
            "nationality": 0.9977, 
            "surname": 0.9729, 
            "given_name": 0.9729, 
            "sex": 0.9897, 
            "date_of_birth": 0.9998, 
            "date_of_expiry": 0.9995, 
            "date_of_issue": 0.9969, 
            "place_of_birth": 0.9937, 
            "place_of_issue": 0.9993, 
            "issuing_authority": 0.9985
        }
    }
}

外国护照

{
    "result": {
        "country_code": "ETF", 
        "surname": "HUZHAO", 
        "given_name": "ZHAOMIN DESALEGN ", 
        "passport_number": "EP435XXXX", 
        "date_of_birth": "1985-09-18", 
        "sex": "M", 
        "date_of_expiry": "2022-01-15", 
        "machine_code": "P<ETFHUZHAO<< ZHAOMIN <DESALEGN<<<<<<<<<<<<<<<", 
        "machine_code2": "EP435XXXX7ETF8509185M2201155<<<<<<<<<<<<<<08", 
        "extra_info": {},
        "confidence": {
            "country_code": 0.9727, 
            "surname": 0.9727, 
            "given_name": 0.9727, 
            "passport_number": 0.9558, 
            "date_of_birth": 0.9558, 
            "sex": 0.9558, 
            "date_of_expiry": 0.9558
        }
    }
}

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。

  • 读取护照图片的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 RecognizePassportSolution {
    
        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();
            RecognizePassportRequest request = new RecognizePassportRequest();
            PassportRequestBody body = new PassportRequestBody();
            body.withCountryCode("CHN");
            body.withImage("/9j/4AAQSkZJRgABAgEASABIAAD/4RFZRXhpZgAATU0AKgAAAAg...");
            request.withBody(body);
            try {
                RecognizePassportResponse response = client.recognizePassport(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());
            }
        }
    }
    
  • 读取护照图片的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 RecognizePassportSolution {
    
        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();
            RecognizePassportRequest request = new RecognizePassportRequest();
            PassportRequestBody body = new PassportRequestBody();
            body.withCountryCode("CHN");
            body.withUrl("https://BucketName.obs.myhuaweicloud.com/ObjectName");
            request.withBody(body);
            try {
                RecognizePassportResponse response = client.recognizePassport(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());
            }
        }
    }
    
  • 读取护照图片的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 = RecognizePassportRequest()
            request.body = PassportRequestBody(
                country_code="CHN",
                image="/9j/4AAQSkZJRgABAgEASABIAAD/4RFZRXhpZgAATU0AKgAAAAg..."
            )
            response = client.recognize_passport(request)
            print(response)
        except exceptions.ClientRequestException as e:
            print(e.status_code)
            print(e.request_id)
            print(e.error_code)
            print(e.error_msg)
    
  • 读取护照图片的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 = RecognizePassportRequest()
            request.body = PassportRequestBody(
                country_code="CHN",
                url="https://BucketName.obs.myhuaweicloud.com/ObjectName"
            )
            response = client.recognize_passport(request)
            print(response)
        except exceptions.ClientRequestException as e:
            print(e.status_code)
            print(e.request_id)
            print(e.error_code)
            print(e.error_msg)
    
  • 读取护照图片的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.RecognizePassportRequest{}
    	countryCodePassportRequestBody:= "CHN"
    	imagePassportRequestBody:= "/9j/4AAQSkZJRgABAgEASABIAAD/4RFZRXhpZgAATU0AKgAAAAg..."
    	request.Body = &model.PassportRequestBody{
    		CountryCode: &countryCodePassportRequestBody,
    		Image: &imagePassportRequestBody,
    	}
    	response, err := client.RecognizePassport(request)
    	if err == nil {
            fmt.Printf("%+v\n", response)
        } else {
            fmt.Println(err)
        }
    }
    
  • 读取护照图片的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.RecognizePassportRequest{}
    	countryCodePassportRequestBody:= "CHN"
    	urlPassportRequestBody:= "https://BucketName.obs.myhuaweicloud.com/ObjectName"
    	request.Body = &model.PassportRequestBody{
    		CountryCode: &countryCodePassportRequestBody,
    		Url: &urlPassportRequestBody,
    	}
    	response, err := client.RecognizePassport(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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