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# Copyright (c) 2020 PaddlePaddle Authors. All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import utility
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from ppocr.utils.utility import initial_logger
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logger = initial_logger()
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import cv2
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import predict_det
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import predict_rec
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import copy
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import numpy as np
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import math
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import time
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from ppocr.utils.utility import get_image_file_list
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from PIL import Image
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from tools.infer.utility import draw_ocr
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import os
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class TextSystem(object):
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def __init__(self, args):
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self.text_detector = predict_det.TextDetector(args)
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self.text_recognizer = predict_rec.TextRecognizer(args)
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def get_rotate_crop_image(self, img, points):
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img_height, img_width = img.shape[0:2]
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left = int(np.min(points[:, 0]))
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right = int(np.max(points[:, 0]))
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top = int(np.min(points[:, 1]))
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bottom = int(np.max(points[:, 1]))
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img_crop = img[top:bottom, left:right, :].copy()
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points[:, 0] = points[:, 0] - left
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points[:, 1] = points[:, 1] - top
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img_crop_width = int(np.linalg.norm(points[0] - points[1]))
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img_crop_height = int(np.linalg.norm(points[0] - points[3]))
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pts_std = np.float32([[0, 0], [img_crop_width, 0],\
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[img_crop_width, img_crop_height], [0, img_crop_height]])
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M = cv2.getPerspectiveTransform(points, pts_std)
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dst_img = cv2.warpPerspective(
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img_crop,
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M, (img_crop_width, img_crop_height),
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borderMode=cv2.BORDER_REPLICATE)
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dst_img_height, dst_img_width = dst_img.shape[0:2]
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if dst_img_height * 1.0 / dst_img_width >= 1.5:
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dst_img = np.rot90(dst_img)
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return dst_img
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def print_draw_crop_rec_res(self, img_crop_list, rec_res):
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bbox_num = len(img_crop_list)
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for bno in range(bbox_num):
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cv2.imwrite("./output/img_crop_%d.jpg" % bno, img_crop_list[bno])
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print(bno, rec_res[bno])
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def __call__(self, img):
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ori_im = img.copy()
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dt_boxes, elapse = self.text_detector(img)
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if dt_boxes is None:
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return None, None
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img_crop_list = []
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dt_boxes = sorted_boxes(dt_boxes)
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for bno in range(len(dt_boxes)):
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tmp_box = copy.deepcopy(dt_boxes[bno])
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img_crop = self.get_rotate_crop_image(ori_im, tmp_box)
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img_crop_list.append(img_crop)
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rec_res, elapse = self.text_recognizer(img_crop_list)
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# self.print_draw_crop_rec_res(img_crop_list, rec_res)
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return dt_boxes, rec_res
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def sorted_boxes(dt_boxes):
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"""
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Sort text boxes in order from top to bottom, left to right
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args:
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dt_boxes(array)：detected text boxes with shape [4, 2]
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return:
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sorted boxes(array) with shape [4, 2]
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"""
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num_boxes = dt_boxes.shape[0]
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sorted_boxes = sorted(dt_boxes, key=lambda x: x[0][1])
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_boxes = list(sorted_boxes)
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for i in range(num_boxes - 1):
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if abs(_boxes[i+1][0][1] - _boxes[i][0][1]) < 10 and \
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(_boxes[i + 1][0][0] < _boxes[i][0][0]):
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tmp = _boxes[i]
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_boxes[i] = _boxes[i + 1]
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_boxes[i + 1] = tmp
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return _boxes
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if __name__ == "__main__":
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args = utility.parse_args()
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image_file_list = get_image_file_list(args.image_dir)
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text_sys = TextSystem(args)
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is_visualize = True
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for image_file in image_file_list:
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img = cv2.imread(image_file)
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if img is None:
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logger.info("error in loading image:{}".format(image_file))
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continue
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starttime = time.time()
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dt_boxes, rec_res = text_sys(img)
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elapse = time.time() - starttime
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print("Predict time of %s: %.3fs" % (image_file, elapse))
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dt_num = len(dt_boxes)
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dt_boxes_final = []
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for dno in range(dt_num):
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text, score = rec_res[dno]
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if score >= 0.5:
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text_str = "%s, %.3f" % (text, score)
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print(text_str)
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dt_boxes_final.append(dt_boxes[dno])
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if is_visualize:
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image = Image.fromarray(cv2.cvtColor(img, cv2.COLOR_BGR2RGB))
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boxes = dt_boxes
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txts = [rec_res[i][0] for i in range(len(rec_res))]
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scores = [rec_res[i][1] for i in range(len(rec_res))]
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draw_img = draw_ocr(
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image, boxes, txts, scores, draw_txt=True, drop_score=0.5)
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draw_img_save = "./doc/imgs_results/"
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if not os.path.exists(draw_img_save):
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os.makedirs(draw_img_save)
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cv2.imwrite(
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os.path.join(draw_img_save, os.path.basename(image_file)),
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draw_img)
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