Uniform predictions (identical saliency scores) during TVSum dataset evaluation with Lighthouse pipeline
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- Python
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Description
When evaluating the Lighthouse model on the TVSum dataset using the provided scripts, the model outputs identical highlight scores across all time windows, despite following the tutorial steps.
eval_command:
python /lighthouse/training/evaluate.py --model uvcom --dataset tvsum --feature i3d_clip --domain BK --split val --model_path checkpoints/results/uvcom/tvsum/i3d_clip/BK/best.ckpt --eval_path data/tvsum/tvsum_val_release.jsonl
I printed out the saliency score predictions during the evaluation, and a screenshot is attached below to show the output.

1.Are there known issues with TVSum evaluation in the current version?
2.Could the problem stem from data loading or post-processing steps or shape problem of loaded features? \
However, i downloaded all the checkpoints and extracted-features from the link on lighthouse repo page.
Appreciate your guidance to resolve this issue.
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Research direction
Start with training/evaluate.py and reproduce the issue using the provided TVSum evaluation command, checkpoint, and JSONL path. Inspect the loaded i3d_clip feature shapes, data loading, and post-processing while comparing the predicted scores across time windows. Done means identifying the cause of the identical predictions and confirming that evaluation produces non-uniform scores.
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Assessment
- Tech stack
- python
- Domain
- computer-vision, machine-learning
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 25/100