VIN码识别
约束与限制
- 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4096px之间。
- 能处理反光、暗光、防伪标识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/vin
请求参数
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。 |
Content-Type |
是 |
String |
发送的实体的MIME类型,参数值为“application/json”。 |
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。
|
参数 |
是否必选 |
参数类型 |
说明 |
---|---|---|---|
image |
否 |
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 |
否 |
String |
该参数与image二选一。图片的url路径,目前支持:
说明:
|
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
参数 |
参数类型 |
描述 |
---|---|---|
result |
VINResult object |
识别结果。 调用失败时不返回此字段。 |
状态码: 400
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。 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
- 传入车架号VIN码图片的base64编码进行文字识别
POST https://{endpoint}/v2/{project_id}/ocr/vin Request Header: Content-Type: application/json X-Auth-Token: MIINRwYJKoZIhvcNAQcCoIINODCCDTQCAQExDTALBglghkgBZQMEAgEwgguVBgkqhkiG... Request Body: { "image":"/9j/4AAQSkZJRgABAgEASABIAAD/4RFZRXhpZgAATU0AKgAAAA..." }
- 传入车架号VIN码图片的url进行文字识别
POST https://{endpoint}/v2/{project_id}/ocr/vin Request Header: Content-Type: application/json X-Auth-Token: MIINRwYJKoZIhvcNAQcCoIINODCCDTQCAQExDTALBglghkgBZQMEAgEwgguVBgkqhkiG... Request Body: { "url":"https://BucketName.obs.xxxx.com/ObjectName" }
响应示例
状态码:200
成功响应示例
{ "result": { "vin": "JN8BYXXXXXXXX7207" } }
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。
使用SDK前建议将SDK更新至最新版,防止本地旧版SDK无法使用最新的OCR功能。
- 传入车架号VIN码图片的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 RecognizeVinSolution { 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(); RecognizeVinRequest request = new RecognizeVinRequest(); VinRequestBody body = new VinRequestBody(); body.withImage("/9j/4AAQSkZJRgABAgEASABIAAD/4RFZRXhpZgAATU0AKgAAAA..."); request.withBody(body); try { RecognizeVinResponse response = client.recognizeVin(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()); } } }
- 传入车架号VIN码图片的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 RecognizeVinSolution { 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(); RecognizeVinRequest request = new RecognizeVinRequest(); VinRequestBody body = new VinRequestBody(); body.withUrl("https://BucketName.obs.myhuaweicloud.com/ObjectName"); request.withBody(body); try { RecognizeVinResponse response = client.recognizeVin(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()); } } }
- 传入车架号VIN码图片的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 = RecognizeVinRequest() request.body = VinRequestBody( image="/9j/4AAQSkZJRgABAgEASABIAAD/4RFZRXhpZgAATU0AKgAAAA..." ) response = client.recognize_vin(request) print(response) except exceptions.ClientRequestException as e: print(e.status_code) print(e.request_id) print(e.error_code) print(e.error_msg)
- 传入车架号VIN码图片的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 = RecognizeVinRequest() request.body = VinRequestBody( url="https://BucketName.obs.myhuaweicloud.com/ObjectName" ) response = client.recognize_vin(request) print(response) except exceptions.ClientRequestException as e: print(e.status_code) print(e.request_id) print(e.error_code) print(e.error_msg)
- 传入车架号VIN码图片的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.RecognizeVinRequest{} imageVinRequestBody:= "/9j/4AAQSkZJRgABAgEASABIAAD/4RFZRXhpZgAATU0AKgAAAA..." request.Body = &model.VinRequestBody{ Image: &imageVinRequestBody, } response, err := client.RecognizeVin(request) if err == nil { fmt.Printf("%+v\n", response) } else { fmt.Println(err) } }
- 传入车架号VIN码图片的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.RecognizeVinRequest{} urlVinRequestBody:= "https://BucketName.obs.myhuaweicloud.com/ObjectName" request.Body = &model.VinRequestBody{ Url: &urlVinRequestBody, } response, err := client.RecognizeVin(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。
状态码
状态码 |
描述 |
---|---|
200 |
成功响应示例 |
400 |
失败响应示例 |
状态码请参见状态码。
错误码
错误码请参见错误码。