arthur/index.html
Your Name de90bfd907 Registered photo underlay as the plate reference
The generated face oval was never going to be good enough to draw from:
MediaPipe's face oval is the FACE boundary, cut at the hairline and excluding
hair, ears, jaw and neck, so it is an egg by construction. Segmentation would
give a real head outline but costs a 16MB model and per-frame inference for a
shape that gets replaced by a drawing anyway.

So the plate layer becomes switchable, and the useful modes are photographic:
the source frame mapped into raster space through the same transform chain the
contours go through. Registration is the whole point - the head sits still and
a drawing traced from the underlay is already aligned to the mouth. An
unregistered underlay would be decoration.

- underlay.js: pixel->raster affine (a general affine, since MediaPipe
  normalises x by width and y by height), registered draw, palette posterise
- plate modes: photo / photo dim / posterized / oval / oval+photo / none, B cycles
- worksheet cells are registered composites rather than raw crops
- Save frame 4x writes a 1280x800 PNG to draw on
- selftest: FACE_OVAL simplicity, which was never asserted; a wrong ordering
  there reads as a lumpy plate rather than an obvious bowtie

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
2026-09-24 14:57:59 -04:00

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<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>roto — take builder</title>
<style>
:root { --bg:#0b0d13; --panel:#12151f; --line:#232836; --fg:#e8eaf0;
--dim:#8891a5; --accent:#fbbf24; --ok:#4ade80; --err:#f87171; }
* { box-sizing: border-box; }
body { margin:0; background:var(--bg); color:var(--fg);
font:13px/1.5 ui-monospace,SFMono-Regular,Menlo,monospace; }
header { padding:12px 18px; border-bottom:1px solid var(--line);
display:flex; gap:10px; align-items:center; flex-wrap:wrap; }
h1 { font-size:14px; margin:0 8px 0 0; letter-spacing:.04em; }
h1 span { color:var(--dim); font-weight:400; }
main { padding:16px 18px 40px; display:flex; flex-direction:column; gap:16px; }
.row { display:flex; gap:16px; flex-wrap:wrap; }
.panel { background:var(--panel); border:1px solid var(--line); border-radius:4px; padding:12px; }
.panel h2 { font-size:11px; text-transform:uppercase; letter-spacing:.08em;
color:var(--dim); margin:0 0 8px; font-weight:500; }
canvas { display:block; image-rendering:pixelated; max-width:100%; border-radius:2px; }
button,input[type=text],select { font:inherit; background:#1c2130; color:var(--fg);
border:1px solid var(--line); border-radius:3px; padding:5px 10px; cursor:pointer; }
button:hover { border-color:var(--accent); }
input[type=text] { cursor:text; }
label.ctl { display:grid; grid-template-columns:132px 1fr 46px; gap:10px;
align-items:center; margin-bottom:6px; }
label.ctl span:first-child { color:var(--dim); }
label.ctl output { text-align:right; color:var(--accent); }
input[type=range] { width:100%; accent-color:var(--accent); }
#status { color:var(--dim); } #status.ok{color:var(--ok)} #status.err{color:var(--err)} #status.warn{color:var(--accent)}
#readout { color:var(--dim); font-size:12px; }
/* the frame strip is the editing surface */
#strip { display:flex; flex-wrap:wrap; gap:4px; }
.fr { position:relative; cursor:pointer; border:2px solid transparent; border-radius:3px; line-height:0; }
.fr canvas { border-radius:1px; }
.fr span { position:absolute; left:2px; bottom:2px; font-size:10px; line-height:1.2;
padding:0 3px; border-radius:2px; background:#000a; color:#fff; }
.fr.keep { border-color:var(--ok); }
.fr.drop { border-color:#2a2f3e; }
.fr.drop canvas { opacity:.26; filter:grayscale(1); }
.fr.cur { border-color:var(--accent); }
.fr.keep::after { content:'●'; position:absolute; right:3px; top:1px; color:var(--ok); font-size:10px; }
#sheet { display:flex; flex-wrap:wrap; gap:10px; }
#sheet .cell { display:flex; flex-direction:column; gap:3px; cursor:pointer; }
#sheet .cell span { color:var(--dim); font-size:11px; }
#sheet .cell:hover span { color:var(--accent); }
#palette { display:flex; gap:12px; flex-wrap:wrap; }
.sw { display:flex; align-items:center; gap:5px; color:var(--dim); font-size:11px; }
.sw input { width:26px; height:20px; padding:0; border:1px solid var(--line); background:none; }
.legend { color:var(--dim); font-size:11px; margin-top:6px; }
kbd { background:#1c2130; border:1px solid var(--line); border-radius:2px;
padding:0 4px; color:var(--fg); font-size:11px; }
</style>
</head>
<body>
<header>
<h1>roto <span>— frame removal + take builder</span></h1>
<button id="btn-synth">Synthetic</button>
<input type="text" id="framedir" value="frames" size="7" title="frame directory">
<button id="btn-frames">Load frames</button>
<button id="btn-play">Play</button>
<select id="speed" title="playback speed"><option value="1">1x</option><option value="0.5">½x</option><option value="0.25">¼x</option></select>
<audio id="audio" controls hidden style="height:28px;vertical-align:middle"></audio>
<button id="btn-keepall">Keep all</button>
<button id="btn-suggest">Suggest</button>
<input type="text" id="takename" value="line_01" size="9" title="take name">
<select id="plateMode" title="plate representation (B to cycle)">
<option value="photo-dim">photo dim</option>
<option value="photo">photo</option>
<option value="posterize">posterized</option>
<option value="oval" selected>oval</option>
<option value="oval+photo">oval + photo</option>
<option value="off">none</option>
</select>
<button id="btn-saveframe">Save frame 4x</button>
<button id="btn-export">Export .take</button>
<span id="status"></span>
</header>
<main>
<div class="row">
<div class="panel">
<h2>source + landmarks</h2>
<canvas id="cv-source"></canvas>
<div class="legend">outer lip <b style="color:#4ade80">—</b> · inner lip <b style="color:#f87171">—</b></div>
</div>
<div class="panel">
<h2>stabilised (head-local)</h2>
<canvas id="cv-stab"></canvas>
<div class="legend">should sit still except the mouth · grey = held plate outline</div>
</div>
<div class="panel">
<h2>flat render — 320×200 indexed</h2>
<canvas id="cv-render"></canvas>
<div class="legend" id="framelabel"></div>
<div class="legend">audio drives the clock — dropped frames, never drift<br>
plate representation: <kbd>B</kbd> cycles · photo modes are <b>registered</b>
into raster space, so tracing them lands on the mouth</div>
</div>
</div>
<div class="panel">
<h2>frames — green kept (gets its own drawing) · dim held from the last kept frame</h2>
<div id="strip"></div>
<input type="range" id="scrub" min="0" max="0" value="0" style="width:100%;margin-top:10px">
<div class="legend">
<kbd>←</kbd> <kbd>→</kbd> step · <kbd>X</kbd> delete · <kbd>K</kbd> keep · <kbd>B</kbd> background ·
click to select · double-click or shift-click to toggle ·
the mouth keeps <b>every</b> frame regardless
</div>
<div class="legend" id="readout"></div>
</div>
<div class="row">
<div class="panel" style="flex:1 1 400px">
<h2>knobs</h2>
<label class="ctl"><span>vertices</span><input type="range" id="verts" min="4" max="16" step="2" value="8"><output id="vertsv"></output></label>
<label class="ctl"><span>contour avg ±f</span><input type="range" id="contourSmooth" min="0" max="4" value="1"><output id="contourSmoothv"></output></label>
<label class="ctl"><span>anchor avg ±f</span><input type="range" id="smoothWin" min="0" max="8" value="2"><output id="smoothWinv"></output></label>
<label class="ctl"><span>closed-mouth cut</span><input type="range" id="apertureThresh" min="0" max="400" value="120"><output id="apertureThreshv"></output></label>
<label class="ctl"><span>suggest tolerance</span><input type="range" id="tol" min="2" max="60" value="14"><output id="tolv"></output></label>
<div class="legend">
<b>contour avg</b> 0 = off, 1 = ±1 frame. Removes per-frame landmark
jitter. Push past 2 and it starts eating articulation.<br>
<b>anchor avg</b> smooths the head transform only — never the contour.<br>
<b>suggest tolerance</b> only affects the Suggest button: max head movement
allowed before a new drawing is required.
</div>
</div>
<div class="panel" style="flex:1 1 280px">
<h2>palette</h2>
<div id="palette"></div>
<div class="legend" style="margin-top:12px">
Flat indexed fills, no antialiasing — the rasteriser writes palette
indices, the way <code>csd_render_poly</code> does.
</div>
</div>
</div>
<div class="panel">
<h2>drawings needed — registered reference per kept frame, with the range it holds</h2>
<div id="sheet"></div>
</div>
</main>
<script type="module" src="./js/app.js"></script>
</body>
</html>