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import cv2
import random
import math
import numpy as np
from PIL import Image, ImageDraw, ImageFont
__all__ = ["draw_system", "draw_det"]
def draw_det(dt_boxes, img):
for box in dt_boxes:
box = np.array(box).astype(np.int32).reshape(-1, 2)
cv2.polylines(img, [box], True, color=(255, 255, 0), thickness=2)
return img
def draw_system(
image,
boxes,
txts=None,
scores=None,
drop_score=0.5,
font_path="./doc/fonts/simfang.ttf", ):
h, w = image.height, image.width
img_left = image.copy()
img_right = np.ones((h, w, 3), dtype=np.uint8) * 255
random.seed(0)
draw_left = ImageDraw.Draw(img_left)
if txts is None or len(txts) != len(boxes):
txts = [None] * len(boxes)
for idx, (box, txt) in enumerate(zip(boxes, txts)):
if scores is not None and scores[idx] < drop_score:
continue
color = (random.randint(0, 255), random.randint(0, 255),
random.randint(0, 255))
draw_left.polygon(box, fill=color)
img_right_text = draw_box_txt_fine((w, h), box, txt, font_path)
pts = np.array(box, np.int32).reshape((-1, 1, 2))
cv2.polylines(img_right_text, [pts], True, color, 1)
img_right = cv2.bitwise_and(img_right, img_right_text)
img_left = Image.blend(image, img_left, 0.5)
img_show = Image.new("RGB", (w * 2, h), (255, 255, 255))
img_show.paste(img_left, (0, 0, w, h))
img_show.paste(Image.fromarray(img_right), (w, 0, w * 2, h))
return np.array(img_show)
def draw_box_txt_fine(img_size, box, txt, font_path="./doc/fonts/simfang.ttf"):
box_height = int(
math.sqrt((box[0][0] - box[3][0])**2 + (box[0][1] - box[3][1])**2))
box_width = int(
math.sqrt((box[0][0] - box[1][0])**2 + (box[0][1] - box[1][1])**2))
if box_height > 2 * box_width and box_height > 30:
img_text = Image.new("RGB", (box_height, box_width), (255, 255, 255))
draw_text = ImageDraw.Draw(img_text)
if txt:
font = create_font(txt, (box_height, box_width), font_path)
draw_text.text([0, 0], txt, fill=(0, 0, 0), font=font)
img_text = img_text.transpose(Image.ROTATE_270)
else:
img_text = Image.new("RGB", (box_width, box_height), (255, 255, 255))
draw_text = ImageDraw.Draw(img_text)
if txt:
font = create_font(txt, (box_width, box_height), font_path)
draw_text.text([0, 0], txt, fill=(0, 0, 0), font=font)
pts1 = np.float32(
[[0, 0], [box_width, 0], [box_width, box_height], [0, box_height]])
pts2 = np.array(box, dtype=np.float32)
M = cv2.getPerspectiveTransform(pts1, pts2)
img_text = np.array(img_text, dtype=np.uint8)
img_right_text = cv2.warpPerspective(
img_text,
M,
img_size,
flags=cv2.INTER_NEAREST,
borderMode=cv2.BORDER_CONSTANT,
borderValue=(255, 255, 255), )
return img_right_text
def create_font(txt, sz, font_path="./doc/fonts/simfang.ttf"):
font_size = int(sz[1] * 0.99)
font = ImageFont.truetype(font_path, font_size, encoding="utf-8")
length = font.getlength(txt)
if length > sz[0]:
font_size = int(font_size * sz[0] / length)
font = ImageFont.truetype(font_path, font_size, encoding="utf-8")
return font
def str_count(s):
"""
Count the number of Chinese characters,
a single English character and a single number
equal to half the length of Chinese characters.
args:
s(string): the input of string
return(int):
the number of Chinese characters
"""
import string
count_zh = count_pu = 0
s_len = len(s)
en_dg_count = 0
for c in s:
if c in string.ascii_letters or c.isdigit() or c.isspace():
en_dg_count += 1
elif c.isalpha():
count_zh += 1
else:
count_pu += 1
return s_len - math.ceil(en_dg_count / 2)
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