crnn_process.cc 3.7 KB
Newer Older
L
LDOUVLEV 已提交
1 2 3 4 5 6 7 8 9 10 11 12 13 14
// 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.

L
update  
LDOUBLEV 已提交
15
#include "crnn_process.h" //NOLINT
L
LDOUVLEV 已提交
16 17 18 19 20 21
#include <algorithm>
#include <memory>
#include <string>

const std::vector<int> rec_image_shape{3, 32, 320};

22
cv::Mat CrnnResizeImg(cv::Mat img, float wh_ratio) {
L
LDOUVLEV 已提交
23 24 25 26 27 28 29
  int imgC, imgH, imgW;
  imgC = rec_image_shape[0];
  imgW = rec_image_shape[2];
  imgH = rec_image_shape[1];

  imgW = int(32 * wh_ratio);

L
LDOUBLEV 已提交
30
  float ratio = static_cast<float>(img.cols) / static_cast<float>(img.rows);
L
LDOUVLEV 已提交
31 32 33 34
  int resize_w, resize_h;
  if (ceilf(imgH * ratio) > imgW)
    resize_w = imgW;
  else
L
LDOUBLEV 已提交
35
    resize_w = static_cast<int>(ceilf(imgH * ratio));
L
LDOUVLEV 已提交
36
  cv::Mat resize_img;
L
update  
LDOUBLEV 已提交
37 38
  cv::resize(img, resize_img, cv::Size(resize_w, imgH), 0.f, 0.f,
             cv::INTER_LINEAR);
L
LDOUVLEV 已提交
39

40
  return resize_img;
L
LDOUVLEV 已提交
41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78
}

std::vector<std::string> ReadDict(std::string path) {
  std::ifstream in(path);
  std::string filename;
  std::string line;
  std::vector<std::string> m_vec;
  if (in) {
    while (getline(in, line)) {
      m_vec.push_back(line);
    }
  } else {
    std::cout << "no such file" << std::endl;
  }
  return m_vec;
}

cv::Mat GetRotateCropImage(cv::Mat srcimage,
                           std::vector<std::vector<int>> box) {
  cv::Mat image;
  srcimage.copyTo(image);
  std::vector<std::vector<int>> points = box;

  int x_collect[4] = {box[0][0], box[1][0], box[2][0], box[3][0]};
  int y_collect[4] = {box[0][1], box[1][1], box[2][1], box[3][1]};
  int left = int(*std::min_element(x_collect, x_collect + 4));
  int right = int(*std::max_element(x_collect, x_collect + 4));
  int top = int(*std::min_element(y_collect, y_collect + 4));
  int bottom = int(*std::max_element(y_collect, y_collect + 4));

  cv::Mat img_crop;
  image(cv::Rect(left, top, right - left, bottom - top)).copyTo(img_crop);

  for (int i = 0; i < points.size(); i++) {
    points[i][0] -= left;
    points[i][1] -= top;
  }

L
LDOUBLEV 已提交
79 80 81 82 83 84
  int img_crop_width =
      static_cast<int>(sqrt(pow(points[0][0] - points[1][0], 2) +
                            pow(points[0][1] - points[1][1], 2)));
  int img_crop_height =
      static_cast<int>(sqrt(pow(points[0][0] - points[3][0], 2) +
                            pow(points[0][1] - points[3][1], 2)));
L
LDOUVLEV 已提交
85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100

  cv::Point2f pts_std[4];
  pts_std[0] = cv::Point2f(0., 0.);
  pts_std[1] = cv::Point2f(img_crop_width, 0.);
  pts_std[2] = cv::Point2f(img_crop_width, img_crop_height);
  pts_std[3] = cv::Point2f(0.f, img_crop_height);

  cv::Point2f pointsf[4];
  pointsf[0] = cv::Point2f(points[0][0], points[0][1]);
  pointsf[1] = cv::Point2f(points[1][0], points[1][1]);
  pointsf[2] = cv::Point2f(points[2][0], points[2][1]);
  pointsf[3] = cv::Point2f(points[3][0], points[3][1]);

  cv::Mat M = cv::getPerspectiveTransform(pointsf, pts_std);

  cv::Mat dst_img;
L
update  
LDOUBLEV 已提交
101
  cv::warpPerspective(img_crop, dst_img, M,
L
LDOUVLEV 已提交
102 103 104
                      cv::Size(img_crop_width, img_crop_height),
                      cv::BORDER_REPLICATE);

L
LDOUBLEV 已提交
105 106 107
  const float ratio = 1.5;
  if (static_cast<float>(dst_img.rows) >=
      static_cast<float>(dst_img.cols) * ratio) {
L
LDOUVLEV 已提交
108 109 110 111 112 113 114 115
    cv::Mat srcCopy = cv::Mat(dst_img.rows, dst_img.cols, dst_img.depth());
    cv::transpose(dst_img, srcCopy);
    cv::flip(srcCopy, srcCopy, 0);
    return srcCopy;
  } else {
    return dst_img;
  }
}