roboflow / roboflow/roboflow-python
`model.predict` fails when running segmentation model on numpy images
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bug
- Dominant language
- Python
- Stars
- 629
- Forks
- 140
- Avg merge
- 2d 2h
- Merged PRs (30d)
- 5
Description
import cv2
version = rf.workspace("model-examples").project("car-parts-instance-segmentation").version(3)
dataset = version.download("yolov8")
seg_model = version.model
first_image_path = os.listdir(f"{dataset.location}/train/images")[0]
first_image_path = f"{dataset.location}/train/images/{first_image_path}"
seg_image = cv2.imread(first_image_path)
assert seg_image is not None
# Path
result = seg_model.predict(first_image_path).json()
detections = sv.Detections.from_inference(result)
assert len(detections) > 0
# Succeeds
# Np img
result = seg_model.predict(seg_image).json()
detections = sv.Detections.from_inference(result)
assert len(detections) > 0
# Fails!
# Empty np img
result = seg_model.predict(black_image).json()
detections = sv.Detections.from_inference(result)
assert len(detections) == 0
# Fails!
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by reproducing the examples in the issue and trace the model.predict entry point for path inputs versus NumPy images. Verify the behavior for the segmentation image and the empty black image; done means both return results that can be converted with sv.Detections.from_inference, with zero detections for the empty image.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- numpy, opencv, python
- Domain
- computer-vision, machine-learning
- Issue type
- Bug
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 45/100