OCR识别
最近作者项目中用到了身份证识别跟营业执照的OCR识别，就研究了一下百度云跟腾讯云的OCR产品接口。
1.腾讯云OCR
收费：身份证OCR和营业执照OCR接口，每个接口每个月各有1000次的免费调用
接口说明：
-
身份证OCR接口 -
https://cloud.tencent.com/document/product/866/33524
-
https://cloud.tencent.com/document/product/866/17598
身份证-OCR接入
-
引入腾讯的SDK及JSON
<dependency>
<groupId>com.tencentcloudapi</groupId>
<artifactId>tencentcloud-sdk-java</artifactId>
<version>3.0.58</version>
</dependency>
<dependency>
<groupId>net.sf.json-lib</groupId>
<artifactId>json-lib</artifactId>
<version>2.4</version>
<classifier>jdk15</classifier>
</dependency>
2.前端html代码
<form action="/ocr/uploadFile" method="POST" enctype="multipart/form-data"> <input type="file" name="file"> <br /> <input type="radio" name="card_side" value="FRONT"> 正面 <input type="radio" name="card_side" value="BACK"> 反面 <br /> <input type="submit" value="提交"> </form>
3.后端代码
@PostMapping("uploadFile")
@ResponseBody
public IDCardOCRResponse OCRIdCardTest(@RequestParam(value = "file") MultipartFile file,@RequestParam(value = "card_side") String cardSize,Model model){
try {
Credential cred = new Credential("AKIDGQfhYTqEs0DMvUQH93wXKsIX", "7adThzEEH6mK6zg9MMwX0");
HttpProfile httpProfile = new HttpProfile();
httpProfile.setEndpoint("ocr.tencentcloudapi.com");
ClientProfile clientProfile = new ClientProfile();
clientProfile.setHttpProfile(httpProfile);
OcrClient client = new OcrClient(cred, "ap-beijing", clientProfile);
Map<String, String> params = new HashMap<>();
params.put("ImageBase64", getBase64FromInputStream(file.getInputStream()));
params.put("CardSide", cardSize);
System.out.println(getBase64FromInputStream(file.getInputStream()));
IDCardOCRRequest req = IDCardOCRRequest.fromJsonString(JSONObject.fromObject(params).toString(), IDCardOCRRequest.class);
IDCardOCRResponse resp = client.IDCardOCR(req);
return resp;
} catch (Exception e) {
// TODO: handle exception
e.printStackTrace();
}
return null;
}
说明：new Credential("secretId","secretKey"),这两个参数在腾讯云控制台申请
4.getBase64FromInputStream代码，把MultipartFile 转为base64
public static String getBase64FromInputStream(InputStream in) { // 将图片文件转化为字节数组字符串，并对其进行Base64编码处理 byte[] data = null; // 读取图片字节数组 try { ByteArrayOutputStream swapStream = new ByteArrayOutputStream(); byte[] buff = new byte[100]; int rc = 0; while ((rc = in.read(buff, 0, 100)) > 0) { swapStream.write(buff, 0, rc); } data = swapStream.toByteArray(); } catch (IOException e) { e.printStackTrace(); } finally { if (in != null) { try { in.close(); } catch (IOException e) { e.printStackTrace(); } } } return new String(Base64.encodeBase64(data)); }
运行前端html码，选择身份证图片，点击提交就可以返回身份证的信息了。
营业执照-OCR
1.前端html代码
<form action="/ocr/bizlicense" method="POST" enctype="multipart/form-data"> <input type="file" name="file"> <br /> <input type="submit" value="提交"> </form>
2.后端代码
@PostMapping("bizlicense")
@ResponseBody
public String OCRBizlicenseTest(@RequestParam(value = "file") MultipartFile file) throws Exception{
RestTemplate restTemplate = new RestTemplate();
String apiUrl="https://recognition.image.myqcloud.com/ocr/bizlicense";
HttpHeaders headers = new HttpHeaders();
headers.set("host", "recognition.image.myqcloud.com");
headers.set("content-type", "application/json");
String authorization=QQOCRSignUtils.appSign(XXXX, "AKIDGQfhYTqEs0DXXX", "7adThzEEH6mKXXX", "", 10L);
headers.set("authorization",authorization );
JSONObject params = new JSONObject();
params.put("appid", "XXX");
params.put("image", getBase64FromInputStream(file.getInputStream()));
HttpEntity<JSONObject> entity = new HttpEntity<JSONObject>(params, headers);
HttpEntity<String> response = restTemplate.postForEntity(apiUrl, entity, String.class);
return response.getBody();
}
3.QQOCRSignUtils.appSign
/** * 生成 Authorization 签名字段 * * @param appId * @param secretId * @param secretKey * @param bucketName * @param expired * @return * @throws Exception */ public static String appSign(long appId, String secretId, String secretKey, String bucketName, long expired) throws Exception { long now = System.currentTimeMillis() / 1000; int rdm = Math.abs(new Random().nextInt()); String plainText = String.format("a=%d&b=%s&k=%s&t=%d&e=%d&r=%d", appId, bucketName, secretId, now, now + expired, rdm); byte[] hmacDigest = HmacSha1(plainText, secretKey); byte[] signContent = new byte[hmacDigest.length + plainText.getBytes().length]; System.arraycopy(hmacDigest, 0, signContent, 0, hmacDigest.length); System.arraycopy(plainText.getBytes(), 0, signContent, hmacDigest.length, plainText.getBytes().length); return Base64Encode(signContent); }
运行前端html码，选择营业执照图片，点击提交就可以返回营业执照的信息了。
2.百度OCR
通过以下步骤创建OCR应用，作者当时在这一步花了很长时间
创建完之后就可以拿到appId，API Key，Secret Key，就可以调用百度提供的api了
收费：身份证OCR和营业执照OCR接口，每个接口每天各有500次的免费调用
接口说明：
-
身份证OCR接口 -
https://cloud.baidu.com/doc/OCR/OCR-API.html#.E8.BA.AB.E4.BB.BD.E8.AF.81.E8.AF.86.E5.88.AB
-
https://cloud.baidu.com/doc/OCR/OCR-API.html#.E8.90.A5.E4.B8.9A.E6.89.A7.E7.85.A7.E8.AF.86.E5.88.AB
身份证OCR
只列出后端的代码，前端代码跟腾讯的一样，只不过前后面身份证枚举值不一样，参考接口文档说明。
@PostMapping("ocridcard")
@ResponseBody
public String OCRIdCardTest(@RequestParam(value = "file") MultipartFile file,@RequestParam(value = "card_side") String cardSize,Model model){
try {
RestTemplate restTemplate = new RestTemplate();
HttpEntity<String> response = restTemplate.postForEntity("https://aip.baidubce.com/oauth/2.0/token?grant_type=client_credentials&client_id=XXXXXX&client_secret=XXXXXX",null,String.class);
JSONObject jsonObject = JSONObject.fromObject(response.getBody());
System.out.println(response.getBody());
String accessToken = jsonObject.getString("access_token");
String apiUrl="https://aip.baidubce.com/rest/2.0/ocr/v1/idcard?access_token="+accessToken;
HttpHeaders headers = new HttpHeaders();
headers.set("content-type", "application/x-www-form-urlencoded");
MultiValueMap<String, Object> params = new LinkedMultiValueMap<>();
params.add("detect_direction", "true");
params.add("id_card_side", cardSize);
params.add("image", Base64Utils.getBase64FromInputStream(file.getInputStream()));
params.add("detect_risk", "true");
System.out.println(Base64Utils.getBase64FromInputStream(file.getInputStream()));
System.out.println(URLDecoder.decode(URLEncoder.encode(Base64Utils.getBase64FromInputStream(file.getInputStream()),"UTF-8"),"UTF-8"));
HttpEntity<MultiValueMap<String, Object>> entity = new HttpEntity<>(params, headers);
response = restTemplate.postForEntity(apiUrl, entity, String.class);
return response.getBody();
} catch (Exception e) {
// TODO: handle exception
e.printStackTrace();
}
return null;
}
营业执照OCR
@PostMapping("ocrbusinesslicense")
@ResponseBody
public String OCRBusinessLicenseTest(@RequestParam(value = "file") MultipartFile file,Model model){
try {
RestTemplate restTemplate = new RestTemplate();
HttpEntity<String> response = restTemplate.postForEntity("https://aip.baidubce.com/oauth/2.0/token?grant_type=client_credentials&client_id=XXXXX&client_secret=XXXXXX",null,String.class);
JSONObject jsonObject = JSONObject.fromObject(response.getBody());
System.out.println(response.getBody());
String accessToken = jsonObject.getString("access_token");
String apiUrl="https://aip.baidubce.com/rest/2.0/ocr/v1/business_license?access_token="+accessToken;
HttpHeaders headers = new HttpHeaders();
headers.set("content-type", "application/x-www-form-urlencoded");
MultiValueMap<String, Object> params = new LinkedMultiValueMap<>();
params.add("detect_direction", "true");
params.add("image", Base64Utils.getBase64FromInputStream(file.getInputStream()));
System.out.println(Base64Utils.getBase64FromInputStream(file.getInputStream()));
System.out.println(URLDecoder.decode(URLEncoder.encode(Base64Utils.getBase64FromInputStream(file.getInputStream()),"UTF-8"),"UTF-8"));
HttpEntity<MultiValueMap<String, Object>> entity = new HttpEntity<>(params, headers);
response = restTemplate.postForEntity(apiUrl, entity, String.class);
return response.getBody();
} catch (Exception e) {
// TODO: handle exception
e.printStackTrace();
}
return null;
}
作者：Eric.Chen
出处：https://www.cnblogs.com/lc-chenlong
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出处：https://www.cnblogs.com/lc-chenlong
如果喜欢作者的文章，请关注“写代码的猿”订阅号以便第一时间获得最新内容。本文版权归作者所有，欢迎转载
