| import json |
| import os |
| from PIL import Image, ImageDraw, ImageColor, ImageFont |
|
|
| def load_annotation(image_key): |
| with open(os.path.join('annotations', '{:s}.json'.format(image_key)), 'r') as fid: |
| anno = json.load(fid) |
| return anno |
|
|
|
|
| def visualize_gt(image_key, anno, color='green', alpha=125, font=None): |
| try: |
| font = ImageFont.truetype('arial.ttf', 15) |
| except: |
| print('Falling back to default font...') |
| font = ImageFont.load_default() |
| |
| with Image.open(os.path.join('images', '{:s}.jpg'.format(image_key))) as img: |
| img = img.convert('RGBA') |
| img_draw = ImageDraw.Draw(img) |
|
|
| rects = Image.new('RGBA', img.size) |
| rects_draw = ImageDraw.Draw(rects) |
|
|
| for obj in anno['objects']: |
| x1 = obj['bbox']['xmin'] |
| y1 = obj['bbox']['ymin'] |
| x2 = obj['bbox']['xmax'] |
| y2 = obj['bbox']['ymax'] |
|
|
| color_tuple = ImageColor.getrgb(color) |
| if len(color_tuple) == 3: |
| color_tuple = color_tuple + (alpha,) |
| else: |
| color_tuple[-1] = alpha |
|
|
| rects_draw.rectangle((x1+1, y1+1, x2-1, y2-1), fill=color_tuple) |
| img_draw.line(((x1, y1), (x2, y1), (x2, y2), (x1, y2), (x1, y1)), fill='black', width=1) |
|
|
| class_name = obj['label'] |
| img_draw.text((x1 + 5, y1 + 5), class_name, font=font) |
|
|
| img = Image.alpha_composite(img, rects) |
|
|
| return img |
|
|
|
|
| if __name__ == '__main__': |
| image_key = 'Bh36Ed4HBJatMpSNnFTgTw' |
|
|
| |
| anno = load_annotation(image_key) |
|
|
| |
| vis_img = visualize_gt(image_key, anno) |
| vis_img.show() |
