Rule-reward training on controllable cross-video differences (Grounding + MCQ) improves Video MLLM local spatiotemporal evidence localization and transfers to general video QA benchmarks.
Learning to describe differences between pairs of similar images
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DELTAVID: Enhancing Fine-Grained Spatiotemporal Perception with Cross-Video Differences
Rule-reward training on controllable cross-video differences (Grounding + MCQ) improves Video MLLM local spatiotemporal evidence localization and transfers to general video QA benchmarks.