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import math
from PIL import Image, ImageDraw, ImageFont
import numpy as np
class DashedImageDraw(ImageDraw.ImageDraw):
def thick_line(self, xy, direction, fill=None, width=0):
#xy – Sequence of 2-tuples like [(x, y), (x, y), ...]
#direction – Sequence of 2-tuples like [(x, y), (x, y), ...]
if xy[0] != xy[1]:
self.line(xy, fill = fill, width = width)
else:
x1, y1 = xy[0]
dx1, dy1 = direction[0]
dx2, dy2 = direction[1]
if dy2 - dy1 < 0:
x1 -= 1
if dx2 - dx1 < 0:
y1 -= 1
if dy2 - dy1 != 0:
if dx2 - dx1 != 0:
k = - (dx2 - dx1)/(dy2 - dy1)
a = 1/math.sqrt(1 + k**2)
b = (width*a - 1) /2
else:
k = 0
b = (width - 1)/2
x3 = x1 - math.floor(b)
y3 = y1 - int(k*b)
x4 = x1 + math.ceil(b)
y4 = y1 + int(k*b)
else:
x3 = x1
y3 = y1 - math.floor((width - 1)/2)
x4 = x1
y4 = y1 + math.ceil((width - 1)/2)
self.line([(x3, y3), (x4, y4)], fill = fill, width = 1)
return
def dashed_line(self, xy, dash=(2,2), fill=None, width=0):
#xy – Sequence of 2-tuples like [(x, y), (x, y), ...]
for i in range(len(xy) - 1):
x1, y1 = xy[i]
x2, y2 = xy[i + 1]
x_length = x2 - x1
y_length = y2 - y1
length = math.sqrt(x_length**2 + y_length**2)
dash_enabled = True
postion = 0
while postion <= length:
for dash_step in dash:
if postion > length:
break
if dash_enabled:
start = postion/length
end = min((postion + dash_step - 1) / length, 1)
self.thick_line([(round(x1 + start*x_length),
round(y1 + start*y_length)),
(round(x1 + end*x_length),
round(y1 + end*y_length))],
xy, fill, width)
dash_enabled = not dash_enabled
postion += dash_step
return
def dashed_rectangle(self, xy, dash=(2,2), outline=None, width=0):
#xy - Sequence of [(x1, y1), (x2, y2)] where (x1, y1) is top left corner and (x2, y2) is bottom right corner
x1, y1 = xy[0]
x2, y2 = xy[1]
halfwidth1 = math.floor((width - 1)/2)
halfwidth2 = math.ceil((width - 1)/2)
min_dash_gap = min(dash[1::2])
end_change1 = halfwidth1 + min_dash_gap + 1
end_change2 = halfwidth2 + min_dash_gap + 1
odd_width_change = (width - 1)%2
self.dashed_line([(x1 - halfwidth1, y1), (x2 - end_change1, y1)],
dash, outline, width)
self.dashed_line([(x2, y1 - halfwidth1), (x2, y2 - end_change1)],
dash, outline, width)
self.dashed_line([(x2 + halfwidth2, y2 + odd_width_change),
(x1 + end_change2, y2 + odd_width_change)],
dash, outline, width)
self.dashed_line([(x1 + odd_width_change, y2 + halfwidth2),
(x1 + odd_width_change, y1 + end_change2)],
dash, outline, width)
return
def visualBBox(real_im, pred_box, bbox):
# real_im = Image.open(image_path).convert('RGB')
# real_im = np.asarray(real_im)
draw = ImageDraw.Draw(real_im)
dash_draw = DashedImageDraw(real_im)
# color_gt = (255, 0, 0)
# color_predict = (0, 255, 0)
color_gt = (230, 209, 57)
# color_predict = (169, 60, 189)
case_id = bbox[0]
bbox = bbox[1:]
if case_id == 1:
color_predict = (255, 0, 0)
color_gt = (255, 0, 0)
elif case_id == 2:
color_predict = (0, 255, 0)
color_gt = (0, 255, 0)
elif case_id == 3:
color_predict = (0, 0, 255)
color_gt = (0, 0, 255)
else:
color_predict = (169, 60, 189)
if bbox is not None:
# draw.rectangle(bbox, outline=color_gt, width=3)
dash_draw.dashed_rectangle([(bbox[0], bbox[1]), (bbox[2], bbox[3])], dash = (5, 3), outline = color_gt, width = 3)
# x1, y1, x2, y2 = bbox[0], bbox[1], bbox[0] + bbox[2], bbox[1] + bbox[3]
# draw.line([(x1, y1), (x2, y1), (x2, y2), (x1, y2), (x1, y1)], fill='yellow', width=3, dash=(15, 10))
draw.rectangle(pred_box, outline=color_predict, width=3)
# save_path = os.path.basename(image_path)
# real_im.save('outputs/{}.png'.format(save_path))
# try:
# font = ImageFont.truetype('arial.ttf', 24)
# except IOError:
# font = ImageFont.load_default()
# display_str = "GT"
# text_width, text_height = font.getsize(display_str)
# margin = np.ceil(0.05 * text_height)
# draw.rectangle(
# [(left, text_bottom - text_height - 2 * margin), (left + text_width,
# text_bottom)],
# fill=color)
# draw.text(
# (left + margin, text_bottom - text_height - margin),
# display_str,
# fill='black',
# font=font)
# text_bottom -= text_height - 2 * margin
del draw, dash_draw
return real_im
if __name__ == '__main__':
pass
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