Add PaddleOCRv3 & PaddleOCRv2 Support (#139)

* Add PaddleOCR Support

* Add PaddleOCR Support

* Add PaddleOCRv3 Support

* Add PaddleOCRv3 Support

* Update README.md

* Update README.md

* Update README.md

* Update README.md

* Add PaddleOCRv3 Support

* Add PaddleOCRv3 Supports

* Add PaddleOCRv3 Suport

* Fix Rec diff

* Remove useless functions

* Remove useless comments

* Add PaddleOCRv2 Support

csrc/fastdeploy/vision/ocr/ppocr/utils/ocr_postprocess_op.h

@@ -0,0 +1,93 @@
+// Copyright (c) 2020 PaddlePaddle Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#pragma once
+
+#include <iomanip>
+#include <iostream>
+#include <map>
+#include <ostream>
+#include <vector>
+#include "opencv2/core.hpp"
+#include "opencv2/imgcodecs.hpp"
+#include "opencv2/imgproc.hpp"
+
+#include <cstring>
+#include <fstream>
+#include <numeric>
+
+#include "fastdeploy/vision/ocr/ppocr/utils/clipper.h"
+
+namespace fastdeploy {
+namespace vision {
+namespace ocr {
+
+class PostProcessor {
+ public:
+  void GetContourArea(const std::vector<std::vector<float>> &box,
+                      float unclip_ratio, float &distance);
+
+  cv::RotatedRect UnClip(std::vector<std::vector<float>> box,
+                         const float &unclip_ratio);
+
+  float **Mat2Vec(cv::Mat mat);
+
+  std::vector<std::vector<int>> OrderPointsClockwise(
+      std::vector<std::vector<int>> pts);
+
+  std::vector<std::vector<float>> GetMiniBoxes(cv::RotatedRect box,
+                                               float &ssid);
+
+  float BoxScoreFast(std::vector<std::vector<float>> box_array, cv::Mat pred);
+  float PolygonScoreAcc(std::vector<cv::Point> contour, cv::Mat pred);
+
+  void BoxesFromBitmap(const cv::Mat pred,
+                       std::vector<std::vector<std::vector<int>>> *boxes,
+                       const cv::Mat bitmap, const float &box_thresh,
+                       const float &det_db_unclip_ratio,
+                       const std::string &det_db_score_mode);
+
+  void FilterTagDetRes(
+      std::vector<std::vector<std::vector<int>>> *boxes, float ratio_h,
+      float ratio_w,
+      const std::map<std::string, std::array<float, 2>> &im_info);
+
+ private:
+  static bool XsortInt(std::vector<int> a, std::vector<int> b);
+
+  static bool XsortFp32(std::vector<float> a, std::vector<float> b);
+
+  std::vector<std::vector<float>> Mat2Vector(cv::Mat mat);
+
+  inline int _max(int a, int b) { return a >= b ? a : b; }
+
+  inline int _min(int a, int b) { return a >= b ? b : a; }
+
+  template <class T>
+  inline T clamp(T x, T min, T max) {
+    if (x > max) return max;
+    if (x < min) return min;
+    return x;
+  }
+
+  inline float clampf(float x, float min, float max) {
+    if (x > max) return max;
+    if (x < min) return min;
+    return x;
+  }
+};
+
+}  // namespace ocr
+}  // namespace vision
+}  // namespace fastdeploy