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import colorsys |
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import itertools |
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import os |
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from copy import deepcopy |
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from typing import Any, List, Literal |
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import requests |
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from modelscope.hub.utils.utils import get_cache_dir |
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from PIL import Image, ImageDraw, ImageFont |
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def _shuffle_colors(nums: List[Any]) -> List[Any]: |
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if len(nums) == 1: |
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return nums |
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mid = len(nums) // 2 |
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left = nums[:mid] |
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right = nums[mid:] |
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left = _shuffle_colors(left) |
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right = _shuffle_colors(right) |
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new_nums = [] |
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for x, y in zip(left, right): |
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new_nums += [x, y] |
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new_nums += left[len(right):] or right[len(left):] |
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return new_nums |
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def generate_colors(): |
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vs_combinations = [(v, s) for v, s in itertools.product([0.7, 0.3, 1], [0.7, 0.3, 1])] |
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colors = [colorsys.hsv_to_rgb(i / 16, s, v) for v, s in vs_combinations for i in _shuffle_colors(list(range(16)))] |
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colors = [(int(r * 255), int(g * 255), int(b * 255)) for r, g, b in colors] |
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return _shuffle_colors(colors) |
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def download_file(url: str) -> str: |
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url = url.rstrip('/') |
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file_name = url.rsplit('/', 1)[-1] |
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cache_dir = os.path.join(get_cache_dir(), 'files') |
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os.makedirs(cache_dir, exist_ok=True) |
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req = requests.get(url) |
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file_path = os.path.join(cache_dir, file_name) |
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with open(file_path, 'wb') as f: |
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f.write(req.content) |
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return file_path |
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colors = generate_colors() |
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color_mapping = {} |
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def _calculate_brightness(image, region: List[int]): |
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cropped_image = image.crop(region) |
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grayscale_image = cropped_image.convert('L') |
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pixels = list(grayscale_image.getdata()) |
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average_brightness = sum(pixels) / len(pixels) |
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return average_brightness |
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def draw_bbox(image: Image.Image, |
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ref: List[str], |
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bbox: List[List[int]], |
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norm_bbox: Literal['norm1000', 'none'] = 'norm1000'): |
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bbox = deepcopy(bbox) |
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font_path = 'https://modelscope.cn/models/Qwen/Qwen-VL-Chat/resolve/master/SimSun.ttf' |
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for i, box in enumerate(bbox): |
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for i in range(len(box)): |
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box[i] = int(box[i]) |
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if norm_bbox == 'norm1000': |
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box[0] = box[0] / 1000 * image.width |
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box[2] = box[2] / 1000 * image.width |
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box[1] = box[1] / 1000 * image.height |
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box[3] = box[3] / 1000 * image.height |
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draw = ImageDraw.Draw(image) |
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assert len(ref) == len(bbox), f'len(refs): {len(ref)}, len(bboxes): {len(bbox)}' |
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for (left, top, right, bottom), box_ref in zip(bbox, ref): |
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if box_ref not in color_mapping: |
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color_mapping[box_ref] = colors[len(color_mapping) % len(colors)] |
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color = color_mapping[box_ref] |
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draw.rectangle([(left, top), (right, bottom)], outline=color, width=3) |
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file_path = download_file(font_path) |
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font = ImageFont.truetype(file_path, 20) |
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for (left, top, _, _), box_ref in zip(bbox, ref): |
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brightness = _calculate_brightness( |
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image, [left, top, min(left + 100, image.width), |
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min(top + 20, image.height)]) |
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draw.text((left, top), box_ref, fill='white' if brightness < 128 else 'black', font=font) |
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