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# copyright (c) 2021 PaddlePaddle Authors. All Rights Reserve.
#
# 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.
import cv2
import os
import numpy as np
from PIL import Image, ImageDraw, ImageFont
def draw_ser_results(image,
ocr_results,
font_path="doc/fonts/simfang.ttf",
font_size=14):
np.random.seed(2021)
color = (np.random.permutation(range(255)),
np.random.permutation(range(255)),
np.random.permutation(range(255)))
color_map = {
idx: (color[0][idx], color[1][idx], color[2][idx])
for idx in range(1, 255)
}
if isinstance(image, np.ndarray):
image = Image.fromarray(image)
elif isinstance(image, str) and os.path.isfile(image):
image = Image.open(image).convert('RGB')
img_new = image.copy()
draw = ImageDraw.Draw(img_new)
font = ImageFont.truetype(font_path, font_size, encoding="utf-8")
for ocr_info in ocr_results:
if ocr_info["pred_id"] not in color_map:
continue
color = color_map[ocr_info["pred_id"]]
text = "{}: {}".format(ocr_info["pred"], ocr_info["transcription"])
if "bbox" in ocr_info:
# draw with ocr engine
bbox = ocr_info["bbox"]
else:
# draw with ocr groundtruth
bbox = trans_poly_to_bbox(ocr_info["points"])
draw_box_txt(bbox, text, draw, font, font_size, color)
img_new = Image.blend(image, img_new, 0.7)
return np.array(img_new)
def draw_box_txt(bbox, text, draw, font, font_size, color):
# draw ocr results outline
bbox = ((bbox[0], bbox[1]), (bbox[2], bbox[3]))
draw.rectangle(bbox, fill=color)
# draw ocr results
tw = font.getsize(text)[0]
th = font.getsize(text)[1]
start_y = max(0, bbox[0][1] - th)
draw.rectangle(
[(bbox[0][0] + 1, start_y), (bbox[0][0] + tw + 1, start_y + th)],
fill=(0, 0, 255))
draw.text((bbox[0][0] + 1, start_y), text, fill=(255, 255, 255), font=font)
def trans_poly_to_bbox(poly):
x1 = np.min([p[0] for p in poly])
x2 = np.max([p[0] for p in poly])
y1 = np.min([p[1] for p in poly])
y2 = np.max([p[1] for p in poly])
return [x1, y1, x2, y2]
def draw_re_results(image,
result,
font_path="doc/fonts/simfang.ttf",
font_size=18):
np.random.seed(0)
if isinstance(image, np.ndarray):
image = Image.fromarray(image)
elif isinstance(image, str) and os.path.isfile(image):
image = Image.open(image).convert('RGB')
img_new = image.copy()
draw = ImageDraw.Draw(img_new)
font = ImageFont.truetype(font_path, font_size, encoding="utf-8")
color_head = (0, 0, 255)
color_tail = (255, 0, 0)
color_line = (0, 255, 0)
for ocr_info_head, ocr_info_tail in result:
draw_box_txt(ocr_info_head["bbox"], ocr_info_head["transcription"],
draw, font, font_size, color_head)
draw_box_txt(ocr_info_tail["bbox"], ocr_info_tail["transcription"],
draw, font, font_size, color_tail)
center_head = (
(ocr_info_head['bbox'][0] + ocr_info_head['bbox'][2]) // 2,
(ocr_info_head['bbox'][1] + ocr_info_head['bbox'][3]) // 2)
center_tail = (
(ocr_info_tail['bbox'][0] + ocr_info_tail['bbox'][2]) // 2,
(ocr_info_tail['bbox'][1] + ocr_info_tail['bbox'][3]) // 2)
draw.line([center_head, center_tail], fill=color_line, width=5)
img_new = Image.blend(image, img_new, 0.5)
return np.array(img_new)
def draw_rectangle(img_path, boxes):
boxes = np.array(boxes)
img = cv2.imread(img_path)
img_show = img.copy()
for box in boxes.astype(int):
x1, y1, x2, y2 = box
cv2.rectangle(img_show, (x1, y1), (x2, y2), (255, 0, 0), 2)
return img_show |