960 lines
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How We Score Against X-Ray
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Full Experiment Log
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dtourolle/scene-actor-extraction
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Gallery Scope (Full vs. Limited)
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Pose Expansion
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LVFace Deep Dive
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Reproducing the benchmarks
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<h1 id="scene-actor-extraction">scene-actor-extraction<a class="headerlink" href="#scene-actor-extraction" title="Permanent link">¶</a></h1>
|
|
<p>A face-recognition pipeline that finds when each actor appears on screen in
|
|
a film or TV episode, built on <a href="https://gitea.tourolle.paris/dtourolle/KPN">KPN++</a>
|
|
(a C++20 Kahn Process Network library) for the detect, track, match, and
|
|
scene pipeline, with a Jellyfin-integrated gallery and an X-Ray-validated
|
|
optimizer.</p>
|
|
<p>This is a correctly scored second from a held-out film, one the optimizer
|
|
never saw during tuning:</p>
|
|
<p><img alt="A perfect X-Ray second: three faces named at 100%, two more correctly carried off-screen" src="assets/images/lovelace_perfect_second.jpg" /></p>
|
|
<p>Every visible face is named at 100% confidence (Chris Noth, Hank Azaria,
|
|
Bobby Cannavale), the background extra is correctly left unnamed, and the
|
|
two credited cast members without a visible face are correctly reported
|
|
present but not visible. This matches Amazon X-Ray's own record for this
|
|
second exactly.</p>
|
|
<p>Results are not uniform across films. The hardest held-out film scores 46%
|
|
F1. This report documents why: one tunable trade (extinction bridging at
|
|
hard cuts), one structural limit (X-Ray credits people whose faces never
|
|
appear on screen), and a small number of cases where the pipeline is
|
|
correct and X-Ray's ground truth is not. Read
|
|
<a href="methodology/">how we score against X-Ray</a> first. X-Ray's ground truth is
|
|
scene-level; the pipeline's output is per-second. That difference shapes
|
|
every finding below.</p>
|
|
<h2 id="findings">Findings<a class="headerlink" href="#findings" title="Permanent link">¶</a></h2>
|
|
<div class="grid cards">
|
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<ul>
|
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<li>
|
|
<p><span class="twemoji lg middle"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M18 2c-.9 0-2 1-2 2H8c0-1-1.1-2-2-2H2v9c0 1 1 2 2 2h2.2c.4 2 1.7 3.7 4.8 4v2.08C8 19.54 8 22 8 22h8s0-2.46-3-2.92V17c3.1-.3 4.4-2 4.8-4H20c1 0 2-1 2-2V2zM6 11H4V4h2zm14 0h-2V4h2z"/></svg></span> <strong><a href="best-model/">Which model is best?</a></strong></p>
|
|
<hr />
|
|
<p>Calibration curves first, independent of any threshold, then held-out
|
|
F1 across three models. LVFace-B Glint360K wins both, and wins on every
|
|
held-out film.</p>
|
|
</li>
|
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<li>
|
|
<p><span class="twemoji lg middle"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M14 12v7.88c.04.3-.06.62-.29.83a.996.996 0 0 1-1.41 0l-2.01-2.01a.99.99 0 0 1-.29-.83V12h-.03L4.21 4.62a1 1 0 0 1 .17-1.4c.19-.14.4-.22.62-.22h14c.22 0 .43.08.62.22a1 1 0 0 1 .17 1.4L14.03 12z"/></svg></span> <strong><a href="gallery-scope/">Whole vs. cast-restricted gallery</a></strong></p>
|
|
<hr />
|
|
<p>Restricting the matcher to a film's credited cast improves F1,
|
|
recall, and misID rate at once, but is not a shipped runtime feature
|
|
yet.</p>
|
|
</li>
|
|
<li>
|
|
<p><span class="twemoji lg middle"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="m12 0-.66.03 3.81 3.81L16.5 2.5c3.25 1.57 5.59 4.74 5.95 8.5h1.5C23.44 4.84 18.29 0 12 0m0 4c-1.93 0-3.5 1.57-3.5 3.5S10.07 11 12 11s3.5-1.57 3.5-3.5S13.93 4 12 4M.05 13C.56 19.16 5.71 24 12 24l.66-.03-3.81-3.81L7.5 21.5c-3.25-1.56-5.59-4.74-5.95-8.5zM12 13c-3.87 0-7 1.57-7 3.5V18h14v-1.5c0-1.93-3.13-3.5-7-3.5"/></svg></span> <strong><a href="pose-expansion/">Does pose expansion help?</a></strong></p>
|
|
<hr />
|
|
<p>A training-set effect that did not reproduce on 5 held-out films once
|
|
two methodology bugs in the comparison harness were found and fixed.</p>
|
|
</li>
|
|
<li>
|
|
<p><span class="twemoji lg middle"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M18 16h-.58l-.81-.81A7.07 7.07 0 0 0 18 11c0-3.87-3.13-7-7-7-1.5 0-3 .5-4.21 1.4-3.09 2.32-3.72 6.71-1.4 9.8s6.71 3.72 9.8 1.4l.81.81V18l5 5 2-2zm-7 0c-2.76 0-5-2.24-5-5s2.24-5 5-5 5 2.24 5 5-2.24 5-5 5M3 6 1 8V1h7L6 3H3zm18-5v7l-2-2V3h-3l-2-2zM6 19l2 2H1v-7l2 2v3z"/></svg></span> <strong><a href="lvface-deep-dive/">Deep dive: LVFace-B Glint360K</a></strong></p>
|
|
<hr />
|
|
<p>The held-out generalization gap, the two mechanisms behind its errors,
|
|
and every distinct case where it names someone outside the film's
|
|
credited cast.</p>
|
|
</li>
|
|
</ul>
|
|
</div>
|
|
<h2 id="full-experiment-log">Full experiment log<a class="headerlink" href="#full-experiment-log" title="Permanent link">¶</a></h2>
|
|
<ul>
|
|
<li><strong><a href="model-bakeoff/">Full experiment log</a></strong>: the complete log behind the
|
|
four pages above, including how replaying against cached embeddings
|
|
inside the same KPN network makes a full model and configuration
|
|
comparison practical, the full results table, and every caveat. This is
|
|
where the shipped <a href="https://gitea.tourolle.paris/dtourolle/scene-actor-extraction/raw/commit/0bd27470698c45cab21935d636a04512360e1008/src/config.hpp"><code>src/config.hpp</code></a>
|
|
defaults come from.</li>
|
|
<li><strong><a href="service-conversion/">Service conversion (proposal)</a></strong>: design
|
|
sketch for a native idle-GPU worker gated on screen lock, not yet built.</li>
|
|
</ul>
|
|
<h2 id="reproducing-the-benchmarks">Reproducing the benchmarks<a class="headerlink" href="#reproducing-the-benchmarks" title="Permanent link">¶</a></h2>
|
|
<p>Gallery <code>.h5</code> files, embedding dumps, the X-Ray corpus, montage frame
|
|
images, and DE trajectories are not committed to this repository. They are
|
|
pushed to the Gitea package registry and pulled on demand:</p>
|
|
<div class="language-bash highlight"><pre><span></span><code><span id="__span-0-1"><a id="__codelineno-0-1" name="__codelineno-0-1" href="#__codelineno-0-1"></a>scripts/artifacts/pull_artifacts.sh<span class="w"> </span>galleries
|
|
</span><span id="__span-0-2"><a id="__codelineno-0-2" name="__codelineno-0-2" href="#__codelineno-0-2"></a>scripts/artifacts/pull_artifacts.sh<span class="w"> </span>experiment-data
|
|
</span><span id="__span-0-3"><a id="__codelineno-0-3" name="__codelineno-0-3" href="#__codelineno-0-3"></a>scripts/artifacts/pull_artifacts.sh<span class="w"> </span>montage-frames<span class="w"> </span><film-slug>
|
|
</span></code></pre></div>
|
|
<p>See <a href="https://gitea.tourolle.paris/dtourolle/scene-actor-extraction/raw/commit/0bd27470698c45cab21935d636a04512360e1008/scripts/artifacts/push_artifacts.sh"><code>scripts/artifacts/push_artifacts.sh</code></a>
|
|
for the upload side, which requires a <code>GITEA_TOKEN</code> with package write
|
|
scope.</p>
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