add BaiDu OCR interface

Author: AnyListen

readme.md

@@ -1,8 +1,7 @@
 ## 树洞 OCR 文字识别
 一款跨平台的 OCR 小工具
 
-百度网盘：[https://pan.baidu.com/s/1gVVQ58fZ8ori-O7rWKpRPQ](https://pan.baidu.com/s/1gVVQ58fZ8ori-O7rWKpRPQ)
-提取码：m6d8 
+下载地址：[百度网盘](https://pan.baidu.com/s/1gVVQ58fZ8ori-O7rWKpRPQ)  提取码：`m6d8`
 
 > - `xxx-with-jre.xx` 是完整版，带运行环境；如果精简版不能正常工作，请下载完整版使用；
 > - 文字识别使用了各云平台开发的识别接口，因此需要联网才能正常使用；
@@ -38,6 +37,7 @@
   - [x] 识别结果文本对齐（暂未实现多分栏）
   - [x] 全屏模式下截图
   - [x] 添加正在识别动画
+  - [x] 多屏支持
 - [ ] 文本翻译
 - [ ] 公式识别
 - [ ] 表格识别

src/main/java/com/luooqi/ocr/MainFm.java

@@ -182,7 +182,7 @@ public static void doOcr(BufferedImage image){
         processController.show();
         Thread ocrThread = new Thread(()->{
             byte[] bytes = CommUtils.imageToBytes(image);
-            String text = OcrUtils.sogouWebOcr(bytes);
+            String text = OcrUtils.ocrImg(bytes);
             Platform.runLater(()-> {
                 processController.close();
                 textArea.setText(text);

src/main/java/com/luooqi/ocr/utils/OcrUtils.java

@@ -1,8 +1,10 @@
 package com.luooqi.ocr.utils;
 
 import cn.hutool.core.codec.Base64;
+import cn.hutool.core.lang.UUID;
 import cn.hutool.core.util.CharsetUtil;
 import cn.hutool.core.util.StrUtil;
+import cn.hutool.core.util.URLUtil;
 import cn.hutool.crypto.SecureUtil;
 import cn.hutool.http.HttpRequest;
 import cn.hutool.http.HttpResponse;
@@ -12,14 +14,56 @@
 import cn.hutool.json.JSONUtil;
 import com.luooqi.ocr.model.TextBlock;
 
+import java.awt.*;
 import java.util.*;
+import java.util.List;
 
 /**
  * tools-ocr
  * Created by 何志龙 on 2019-03-22.
  */
 public class OcrUtils {
 
+    public static String ocrImg(byte[] imgData) {
+        int i = Math.abs(UUID.randomUUID().hashCode()) % 4;
+        switch (i){
+            case 0:
+                return bdGeneralOcr(imgData);
+            case 1:
+                return bdAccurateOcr(imgData);
+            case 2:
+                return sogouMobileOcr(imgData);
+            default:
+                return sogouWebOcr(imgData);
+        }
+    }
+
+    private static String bdGeneralOcr(byte[] imgData){
+        return bdBaseOcr(imgData, "general_location");
+    }
+
+    private static String bdAccurateOcr(byte[] imgData){
+        return bdBaseOcr(imgData, "https://aip.baidubce.com/rest/2.0/ocr/v1/accurate");
+    }
+
+    private static String bdBaseOcr(byte[] imgData, String type){
+        String[] urlArr = new String[]{"http://ai.baidu.com/tech/ocr/general", "http://ai.baidu.com/index/seccode?action=show"};
+        StringBuilder cookie = new StringBuilder();
+        for (String url : urlArr) {
+            HttpResponse cookieResp = WebUtils.get(url);
+            List<String> ckList = cookieResp.headerList("Set-Cookie");
+            for (String s : ckList) {
+                cookie.append(s.replaceAll("expires[\\S\\s]+", ""));
+            }
+        }
+        HashMap<String, String> header = new HashMap<>();
+        header.put("Referer", "http://ai.baidu.com/tech/ocr/general");
+        header.put("Cookie", cookie.toString());
+        String data = "type="+URLUtil.encodeQuery(type)+"&detect_direction=false&image_url&image=" + URLUtil.encodeQuery("data:image/jpeg;base64," + Base64.encode(imgData)) + "&language_type=CHN_ENG";
+        HttpResponse response = WebUtils.postRaw("http://ai.baidu.com/aidemo", data, 0, header);
+        return extractBdResult(WebUtils.getSafeHtml(response));
+    }
+
     public static String sogouMobileOcr(byte[] imgData) {
         String boundary = "------WebKitFormBoundary8orYTmcj8BHvQpVU";
         String url = "http://ocr.shouji.sogou.com/v2/ocr/json";
@@ -59,7 +103,7 @@ private static String extractSogouResult(String html) {
         }
         JSONArray jsonArray = jsonObject.getJSONArray("result");
         List<TextBlock> textBlocks = new ArrayList<>();
-        boolean isEng = false;
+        boolean isEng;
         for (int i = 0; i < jsonArray.size(); i++) {
             JSONObject jObj = jsonArray.getJSONObject(i);
             TextBlock textBlock = new TextBlock();
@@ -76,4 +120,34 @@ private static String extractSogouResult(String html) {
         return CommUtils.combineTextBlocks(textBlocks, isEng);
     }
 
+    private static String extractBdResult(String html) {
+        if (StrUtil.isBlank(html)) {
+            return "";
+        }
+        JSONObject jsonObject = JSONUtil.parseObj(html);
+        if (jsonObject.getInt("errno", 0) != 0) {
+            return "";
+        }
+        JSONArray jsonArray = jsonObject.getJSONObject("data").getJSONArray("words_result");
+        List<TextBlock> textBlocks = new ArrayList<>();
+        boolean isEng = false;
+        for (int i = 0; i < jsonArray.size(); i++) {
+            JSONObject jObj = jsonArray.getJSONObject(i);
+            TextBlock textBlock = new TextBlock();
+            textBlock.setText(jObj.getStr("words").trim());
+            //noinspection SuspiciousToArrayCall
+            JSONObject location = jObj.getJSONObject("location");
+            int top = location.getInt("top");
+            int left = location.getInt("left");
+            int width = location.getInt("width");
+            int height = location.getInt("height");
+            textBlock.setTopLeft(new Point(top, left));
+            textBlock.setTopRight(new Point(top, left + width));
+            textBlock.setBottomLeft(new Point(top + height, left));
+            textBlock.setBottomRight(new Point(top + height, left + width));
+            textBlocks.add(textBlock);
+        }
+        return CommUtils.combineTextBlocks(textBlocks, isEng);
+    }
+
 }