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import re
from PIL import Image, ImageDraw
def get_boxed_image(image, sub_text, alpha=0.3):
'''
image: Image.Image.
sub_text: String like "(x1, y1), (x2, y2), (x3, y3), (x4, y4)", or it's illegal.
alpha: The transparency of the box.
'''
bbox_list = [(int(x), int(y)) for x, y in re.findall(r'\((\d+),(\d+)\)', sub_text)]
if len(bbox_list) % 2 != 0:
print(f"The coordinate string {sub_text} is illegal, as we extract {len(bbox_list)} coordinates from it!")
return None
image = Image.open(image)
width, height = image.size
image = image.convert("RGBA")
overlay = Image.new("RGBA", image.size, (255, 0, 0, 0))
draw = ImageDraw.Draw(overlay)
red_color = (255, 0, 0, int(255 * alpha))
border_width = max(1, int(min(image.size) * 0.005))
for i in range(0, len(bbox_list), 2):
x1, y1 = bbox_list[i]
x2, y2 = bbox_list[i + 1]
x1, y1, x2, y2 = int(x1/999 * width), int(y1/999 * height), int(x2/999 * width), int(y2/999 * height)
x1 = max(0, min(x1, width))
y1 = max(0, min(y1, height))
x2 = max(0, min(x2, width))
y2 = max(0, min(y2, height))
if x2 <= x1 or y2 <= y1:
print(f"The uniformed coordinates ({x1}, {y1}), ({x2}, {y2}) are illegal, as the positions of them are wrong!")
return None
for i in range(border_width):
draw.rectangle(
[x1 - i, y1 - i, x2 + i, y2 + i],
outline=red_color
)
return Image.alpha_composite(image, overlay).convert("RGB")
id = 1673
image = f'public_eval/bbox_step_300/MathVerse_MINI/20250418/images/{id}.png'
text = '''<think>This table presents information about a point A in relation to a reference point O, including its true bearing and compass direction.\n\nStep 1. Identify the column 'True Bearing'(190,269),(388,935), which contains the true bearing of point A from point O.\nStep 2. Locate the value in the column 'True Bearing': 32°.\nStep 3. Conclude that the true bearing of A from O is 32°.</think>\n<answer>32°</answer>'''
box_image = get_boxed_image(image=image, sub_text=text)
if box_image:
box_image.show()
box_image.save(image.replace('.png', '_bbox.png'))
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