JAVA演示阿里云图像识别API,印刷文字识别-营业执照识别
一、前言
本文主要介绍如何使用JAVA调用阿里云图像识别API,实现营业执照识别的功能。本文将从以下几个方面进行讲解:
- 阿里云图像识别API简介
- 调用步骤
- 示例说明
二、阿里云图像识别API简介
阿里云图像识别API是一项基于深度学习技术、对图像进行智能分析与识别的服务。针对营业执照识别,我们可以使用阿里云图像识别API中印刷文字识别的功能。
三、调用步骤
-
首先需要在阿里云市场上购买阿里云图像识别API,并获取到AccessKey和SecretKey。
-
在JAVA中,我们可以使用阿里云提供的Java SDK进行API的调用。可以通过Maven进行依赖的导入:
xml
<dependency>
<groupId>com.aliyun</groupId>
<artifactId>aliyun-java-sdk-core</artifactId>
<version>4.5.1</version>
</dependency>
<dependency>
<groupId>com.aliyun</groupId>
<artifactId>aliyun-java-sdk-ocr</artifactId>
<version>1.0.0</version>
</dependency>
- AccessToken的获取
首先,我们需要通过AccessKey和SecretKey获取AccessToken。代码示例如下:
java
IClientProfile profile = DefaultProfile.getProfile("cn-beijing", "accessKeyId", "accessSecret");
IAcsClient client = new DefaultAcsClient(profile);
OcrRequest req = new OcrRequest();
req.setMethod(MethodType.POST);
req.setAcceptFormat(FormatType.JSON);
req.setVersion("2019-12-30");
req.setActionName("GetAccessToken");
OcrResponse response = client.getAcsResponse(req);
System.out.println(response.getBody());
上述代码调用了GetAccessToken接口,获取到了AccessToken。
- 图片识别
接下来,我们需要上传图片进行识别。代码示例如下:
java
IClientProfile profile = DefaultProfile.getProfile("cn-beijing", "accessKeyId", "accessSecret");
IAcsClient client = new DefaultAcsClient(profile);
OcrRequest req = new OcrRequest();
req.setMethod(MethodType.POST);
req.setAcceptFormat(FormatType.JSON);
req.setVersion("2019-12-30");
req.setActionName("RecognizeBusinessLicense");
req.putQueryParameter("ImageUrl", "https://xxx.jpg");
OcrResponse response = client.getAcsResponse(req);
System.out.println(response.getBody());
上述代码调用了RecognizeBusinessLicense接口,上传图片进行识别,并返回结果。
四、示例说明
示例一
假设我们有一张名为“license.jpg”的营业执照图片,我们需要识别图片中的信息。代码示例如下:
public static void main(String[] args) {
// 获取AccessToken
String accessToken = getAccessToken();
// 上传图片进行识别
String result = recognize(accessToken, "https://xxx/license.jpg");
System.out.println(result);
}
public static String getAccessToken() {
IClientProfile profile = DefaultProfile.getProfile("cn-beijing", "accessKeyId", "accessSecret");
IAcsClient client = new DefaultAcsClient(profile);
OcrRequest req = new OcrRequest();
req.setMethod(MethodType.POST);
req.setAcceptFormat(FormatType.JSON);
req.setVersion("2019-12-30");
req.setActionName("GetAccessToken");
OcrResponse response = client.getAcsResponse(req);
return response.getBody().trim();
}
public static String recognize(String accessToken, String imageUrl) {
IClientProfile profile = DefaultProfile.getProfile("cn-beijing", "accessKeyId", "accessSecret");
IAcsClient client = new DefaultAcsClient(profile);
OcrRequest req = new OcrRequest();
req.setMethod(MethodType.POST);
req.setAcceptFormat(FormatType.JSON);
req.setVersion("2019-12-30");
req.setActionName("RecognizeBusinessLicense");
req.putQueryParameter("ImageUrl", imageUrl);
req.putQueryParameter("AccessToken", accessToken);
String result = null;
try {
OcrResponse response = client.getAcsResponse(req);
result = response.getBody();
} catch (Exception e) {
e.printStackTrace();
}
return result;
}
示例二
假设我们有多张图片需要识别,我们可以使用线程池,同时识别多张图片。代码示例如下:
public static void main(String[] args) {
// 获取AccessToken
String accessToken = getAccessToken();
// 图片地址列表
List<String> imageUrlList = Arrays.asList(
"https://xxx/license1.jpg",
"https://xxx/license2.jpg",
"https://xxx/license3.jpg");
// 创建线程池,同时识别多张图片
ExecutorService executorService = Executors.newFixedThreadPool(imageUrlList.size());
List<Future<String>> resultList = new ArrayList<>();
for (String imageUrl : imageUrlList) {
Future<String> result = executorService.submit(() -> recognize(accessToken, imageUrl));
resultList.add(result);
}
// 获取识别结果
for (Future<String> result : resultList) {
try {
System.out.println(result.get());
} catch (Exception e) {
e.printStackTrace();
}
}
executorService.shutdown();
}
public static String getAccessToken() {
IClientProfile profile = DefaultProfile.getProfile("cn-beijing", "accessKeyId", "accessSecret");
IAcsClient client = new DefaultAcsClient(profile);
OcrRequest req = new OcrRequest();
req.setMethod(MethodType.POST);
req.setAcceptFormat(FormatType.JSON);
req.setVersion("2019-12-30");
req.setActionName("GetAccessToken");
OcrResponse response = client.getAcsResponse(req);
return response.getBody().trim();
}
public static String recognize(String accessToken, String imageUrl) {
IClientProfile profile = DefaultProfile.getProfile("cn-beijing", "accessKeyId", "accessSecret");
IAcsClient client = new DefaultAcsClient(profile);
OcrRequest req = new OcrRequest();
req.setMethod(MethodType.POST);
req.setAcceptFormat(FormatType.JSON);
req.setVersion("2019-12-30");
req.setActionName("RecognizeBusinessLicense");
req.putQueryParameter("ImageUrl", imageUrl);
req.putQueryParameter("AccessToken", accessToken);
String result = null;
try {
OcrResponse response = client.getAcsResponse(req);
result = response.getBody();
} catch (Exception e) {
e.printStackTrace();
}
return result;
}
五、总结
通过本文的介绍,我们了解了JAVA调用阿里云图像识别API,实现营业执照识别的方法。同时,我们可以通过线程池的方式,提高识别的效率。
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