| import json |
| import math |
| import os |
| import random |
| import sys |
|
|
| import matplotlib.pyplot as plt |
| from matplotlib.patches import Polygon |
| from PIL import Image |
|
|
| multiannotation_path = "instance_segmentation/multiannotator_15imgs.json" |
| img_folder = "images" |
|
|
| if __name__ == "__main__": |
| with open(multiannotation_path) as f: |
| multiannotations = json.load(f) |
|
|
| |
| name = sys.argv[1] if len(sys.argv) > 1 else random.choice(sorted(multiannotations)) |
| annotators = multiannotations[name] |
| print(f"{name}: {len(annotators)} annotators, " |
| f"{sum(len(a['polygons']) for a in annotators)} polygons") |
|
|
| img = Image.open(os.path.join(img_folder, name)) |
| cols = min(4, len(annotators)) |
| rows = math.ceil(len(annotators) / cols) |
| fig, axes = plt.subplots(rows, cols, figsize=(5 * cols, 3 * rows), squeeze=False) |
| for ax in axes.flat: |
| ax.axis("off") |
|
|
| cmap = plt.get_cmap("tab20") |
| for ax, annotator in zip(axes.flat, annotators): |
| ax.imshow(img) |
| for i, poly in enumerate(annotator["polygons"]): |
| pts = [(p["x"], p["y"]) for p in poly["polygon_pts"]] |
| color = cmap(i % cmap.N) |
| ax.add_patch(Polygon(pts, closed=True, alpha=0.4, facecolor=color, |
| edgecolor=color, linewidth=1.5)) |
| ax.set_title(f"{annotator['user_id']} ({len(annotator['polygons'])} polygons)", fontsize=9) |
|
|
| fig.suptitle(name) |
| fig.tight_layout() |
| fig.savefig("example_image_annotations.png", dpi=100) |
| plt.show() |
|
|
