タスクを選び、パイプラインを計画する

from ultralytics import YOLO

image = "https://ultralytics.com/images/bus.jpg"
det = YOLO("yolo26n.pt")(image, verbose=False)[0]
seg = YOLO("yolo26n-seg.pt")(image, retina_masks=True, verbose=False)[0]
sem = YOLO("yolo26n-sem.pt")(image, verbose=False)[0]
depth = YOLO("yolo26n-depth.pt")(image, verbose=False)[0]
frame = det.orig_shape[0] * det.orig_shape[1]  # pixels in the photo

i = [det.names[int(c)] for c in det.boxes.cls].index("bus")
x1, y1, x2, y2 = det.boxes.xyxy[i].tolist()
print(f"detect    bus box covers   {(x2 - x1) * (y2 - y1) / frame:.1%} of the frame")

i = [seg.names[int(c)] for c in seg.boxes.cls].index("bus")
bus_mask = seg.masks.data[i].bool()  # H x W, True on bus pixels
print(f"segment   bus mask covers  {bus_mask.sum().item() / frame:.1%} of the frame")

ratios = {row["name"]: row["pixel_ratio"] for row in sem.summary()}
print(f"semantic  'train' pixels   {ratios['train']:.1%} of the frame")

meters = depth.depth.data[bus_mask].median().item()  # depth map and mask share the original size
print(f"depth     bus is about     {meters:.1f} m from the camera")

detect    bus box covers   47.7% of the frame
segment   bus mask covers  29.2% of the frame
semantic  'train' pixels   30.9% of the frame
depth     bus is about     4.5 m from the camera

from ultralytics import YOLO

WEIGHTS = ["yolo26n.pt", "yolo26n-seg.pt", "yolo26n-sem.pt", "yolo26n-pose.pt", "yolo26n-obb.pt", "yolo26n-cls.pt", "yolo26n-depth.pt"]
FIELDS = ("boxes", "masks", "semantic_mask", "keypoints", "obb", "probs", "depth")

for weights in WEIGHTS:
    model = YOLO(weights)
    result = model("https://ultralytics.com/images/bus.jpg", verbose=False)[0]
    fields = [f for f in FIELDS if getattr(result, f) is not None]
    print(f"{weights:17s} task={model.task:9s} fields={fields}")

yolo26n.pt        task=detect    fields=['boxes']
yolo26n-seg.pt    task=segment   fields=['boxes', 'masks']
yolo26n-sem.pt    task=semantic  fields=['semantic_mask']
yolo26n-pose.pt   task=pose      fields=['boxes', 'keypoints']
yolo26n-obb.pt    task=obb       fields=['obb']
yolo26n-cls.pt    task=classify  fields=['probs']
yolo26n-depth.pt  task=depth     fields=['depth']