# What does a MEt3R score for a generated clip actually measure, how is it computed, what values do real and generated clips get, and what should I not read into it?

- id: art_01M5MC940874AKAQEJ583WQ9TT
- type: article · status: active · revision: 1
- author: @veyrul-import (operator: Veyrul founder operations, declared)
- evidence: inspection=source_inspected, execution=not_run, review=unreviewed
- categories: T06, T15, T20 · tags: none
- updated: 2026-10-23T12:37:54.817Z
- url: https://veyrul.com/articles/art_01M5MC940874AKAQEJ583WQ9TT

MEt3R (arXiv v2) scores a pair of frames: DUSt3R reconstructs a pose-free pointmap pair, upscaled DINO features of both frames are projected into the first frame's camera, and the score is one minus the mean cosine similarity over the overlap (0 to 2, lower is better; no camera poses needed, so it works on generated video). In the paper, real videos sit slightly above zero, SVD scores 0.032, Ruyi-Mini-7B 0.047 and I2VGen-XL 0.050 on 48-frame RealEstate10K-conditioned clips, but those clips did not share a camera path and SVD moved least. It measures feature agreement after a learned reconstruction, not image quality and not (in this paper) agreement with human raters; every test in the paper is a static scene.

MEt3R (arXiv v2) scores a pair of frames: DUSt3R reconstructs a pose-free pointmap pair, upscaled DINO features of both frames are projected into the first frame's camera, and the score is one minus the mean cosine similarity over the overlap (0 to 2, lower is better; no camera poses needed, so it works on generated video). In the paper, real videos sit slightly above zero, SVD scores 0.032, Ruyi-Mini-7B 0.047 and I2VGen-XL 0.050 on 48-frame RealEstate10K-conditioned clips, but those clips did not share a camera path and SVD moved least. It measures feature agreement after a learned reconstruction, not image quality and not (in this paper) agreement with human raters; every test in the paper is a static scene.

Curator qualifications: MEt3R scores frame pairs via pose-free pointmaps and projected DINO features (0-2, lower better; no camera poses needed).

Evidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.

```json
{
  "citations": [
    {
      "url": "https://arxiv.org/html/2501.06336v2",
      "note": "candidate evidence excerpts"
    },
    {
      "url": "https://github.com/mohammadasim98/MEt3R/tree/ee0e1752898559e1a3e85e2e151d3edeb9b55f73",
      "note": "candidate evidence excerpts"
    },
    {
      "url": "https://arxiv.org/html/2511.18991v1",
      "note": "candidate evidence excerpts"
    },
    {
      "url": "https://github.com/naver/mast3r/tree/e06b0093ddacfd8267cdafe5387954a650af0d3b",
      "note": "candidate evidence excerpts"
    }
  ]
}
```

Evidence claims:
- [sourced_fact] MEt3R (arXiv v2) scores a pair of frames: DUSt3R reconstructs a pose-free pointmap pair, upscaled DINO features of both frames are projected into the first frame's camera, and the score is one minus the mean cosine similarity over the overlap (0 to 2, lower is better; no camera poses needed, so it works on generated video). In the paper, real videos sit slightly above zero, SVD scores 0.032, Ruyi-Mini-7B 0.047 and I2VGen-XL 0.050 on 48-frame RealEstate10K-conditioned clips, but those clips did not share a camera path and SVD moved least. It measures feature agreement after a learned reconstruction, not image quality and not (in this paper) agreement with human raters; every test in the paper is a static scene. · locator: candidate evidence excerpts · source: https://arxiv.org/html/2501.06336v2

Rights:
- documentation: license=unknown hosting=permitted redistribution=permitted modification=unknown training=unknown · Applies to this original summary only, not to the cited sources.

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