facex/index.html at main · facex-engine/facex · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>FaceX — Face Recognition in Your Browser</title>
<style>
* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif; background: #0a0a0a; color: #e0e0e0; min-height: 100vh; }

.header { text-align: center; padding: 24px 16px 8px; }
.header h1 { font-size: 24px; color: #fff; }
.header h1 span { color: #10b981; }
.header p { color: #555; font-size: 13px; margin-top: 4px; }

.status { text-align: center; padding: 8px; font-size: 13px; transition: color 0.3s; }
.status.loading { color: #f59e0b; }
.status.ready { color: #10b981; }
.status.error { color: #ef4444; }

.main { max-width: 480px; margin: 0 auto; padding: 0 12px 40px; }

.video-wrap { position: relative; width: 100%; border-radius: 12px; overflow: hidden; background: #111; margin-bottom: 12px; border: 2px solid #222; transition: border-color 0.3s; }
.video-wrap.match { border-color: #10b981; }
.video-wrap.nomatch { border-color: #ef4444; }
video { width: 100%; display: block; transform: scaleX(-1); }
canvas.overlay { position: absolute; top: 0; left: 0; width: 100%; height: 100%; pointer-events: none; transform: scaleX(-1); }

.controls { display: flex; gap: 8px; justify-content: center; margin-bottom: 12px; flex-wrap: wrap; }
.btn { padding: 10px 20px; border-radius: 8px; font-size: 14px; font-weight: 600; cursor: pointer; border: none; transition: all 0.15s; }
.btn:active { transform: scale(0.97); }
.btn-go { background: #10b981; color: #fff; }
.btn-go:hover { background: #059669; }
.btn-stop { background: #ef4444; color: #fff; }
.btn-sec { background: #222; color: #aaa; border: 1px solid #333; }
.btn-sec:hover { background: #333; }
.btn:disabled { background: #1a1a1a; color: #444; cursor: not-allowed; border-color: #1a1a1a; }

.ref-bar { display: flex; align-items: center; gap: 10px; justify-content: center; margin: 10px 0; padding: 10px; background: #111; border-radius: 10px; border: 1px solid #222; }
.ref-bar canvas { width: 56px; height: 56px; border-radius: 6px; border: 1px solid #333; }
.ref-bar .label { font-size: 12px; color: #888; }

.result-bar { text-align: center; padding: 14px; margin: 10px 0; border-radius: 10px; font-size: 15px; font-weight: 600; transition: all 0.2s; }
.result-bar.match { background: #052e16; color: #10b981; border: 1px solid #166534; }
.result-bar.nomatch { background: #1c0a0a; color: #ef4444; border: 1px solid #7f1d1d; }
.result-bar.idle { background: #111; color: #555; border: 1px solid #222; }

.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; margin: 10px 0; }
.stat { text-align: center; background: #111; border-radius: 8px; padding: 8px 4px; border: 1px solid #1a1a1a; }
.stat-val { font-size: 18px; font-weight: 700; color: #10b981; }
.stat-label { font-size: 10px; color: #555; text-transform: uppercase; letter-spacing: 0.5px; }

.liveness-bar { display: flex; align-items: center; gap: 8px; padding: 8px 12px; background: #111; border-radius: 8px; margin: 8px 0; border: 1px solid #222; }
.liveness-dot { width: 10px; height: 10px; border-radius: 50%; background: #ef4444; transition: background 0.3s; }
.liveness-dot.live { background: #10b981; }
.liveness-text { font-size: 12px; color: #888; }

.info { background: #0d0d0d; border: 1px solid #1a1a1a; border-radius: 10px; padding: 14px; margin-top: 16px; }
.info h3 { font-size: 13px; color: #999; margin-bottom: 8px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.5px; }
.info p { font-size: 12px; color: #555; line-height: 1.6; margin-bottom: 4px; }
.info code { background: #1a1a1a; padding: 1px 4px; border-radius: 3px; color: #10b981; font-size: 11px; }

.error-msg { text-align: center; padding: 16px; background: #1c0a0a; border: 1px solid #7f1d1d; border-radius: 10px; margin: 12px 0; color: #ef4444; font-size: 13px; display: none; }
</style>
</head>
<body>

<div class="header">
  <h1>Face<span>X</span></h1>
  <p>74 KB WASM. No server. Everything stays on your device.</p>
</div>

<div id="status" class="status loading">Checking browser support...</div>
<div id="errorMsg" class="error-msg"></div>

<div class="main">
  <div class="video-wrap" id="videoWrap">
    <video id="video" autoplay playsinline muted></video>
    <canvas id="overlay" class="overlay"></canvas>
  </div>

  <div class="controls">
    <button id="btnStart" class="btn btn-go" disabled>Start Camera</button>
    <button id="btnCapture" class="btn btn-sec" disabled>Set Reference</button>
    <button id="btnVerify" class="btn btn-go" disabled style="display:none">Verify</button>
    <button id="btnStop" class="btn btn-stop" style="display:none">Stop</button>
  </div>

  <div id="refBar" class="ref-bar" style="display:none">
    <canvas id="refCanvas" width="112" height="112"></canvas>
    <div><div class="label">Reference face</div></div>
  </div>

  <div id="resultBar" class="result-bar idle">Load engine to begin</div>

  <div id="livenessBar" class="liveness-bar" style="display:none">
    <div id="livenessDot" class="liveness-dot"></div>
    <div id="livenessText" class="liveness-text">Checking liveness...</div>
  </div>

  <div id="statsGrid" class="stats" style="display:none">
    <div class="stat"><div class="stat-val" id="vDet">—</div><div class="stat-label">Detect</div></div>
    <div class="stat"><div class="stat-val" id="vEmb">—</div><div class="stat-label">Embed</div></div>
    <div class="stat"><div class="stat-val" id="vSim">—</div><div class="stat-label">Match</div></div>
    <div class="stat"><div class="stat-val" id="vFps">—</div><div class="stat-label">FPS</div></div>
  </div>

  <div class="info">
    <h3>How it works</h3>
    <p><code>detect.wasm</code> (29 KB) finds faces with RetinaFace INT8 + relaxed SIMD.</p>
    <p><code>facex.wasm</code> (44 KB) computes 512-dim embeddings via EdgeFace-XS.</p>
    <p>5-point alignment ensures accurate matching at any head angle.</p>
    <p>Total: <code>74 KB</code> engine + <code>7.7 MB</code> weights (cached after first load).</p>
  </div>
</div>

<script src="detect.js"></script>
<script src="facex.js"></script>
<script src="align.js"></script>
<script src="liveness.js"></script>
<script>
const $ = id => document.getElementById(id);
const video = $('video');
const overlay = $('overlay');
const ctx = overlay.getContext('2d');
const refCanvas = $('refCanvas');
const refCtx = refCanvas.getContext('2d', { willReadFrequently: true });

let DetMod, FxMod, detH, fxH;
let refEmb = null, running = false;
const liveness = new LivenessDetector();

// Reusable canvases
const srcCv = document.createElement('canvas');
const srcCtx = srcCv.getContext('2d', { willReadFrequently: true });
const cropCv = document.createElement('canvas');
cropCv.width = 112; cropCv.height = 112;
const cropCtxA = cropCv.getContext('2d', { willReadFrequently: true });

// ===== SIMD Check =====
function checkSimd() {
  try {
    return WebAssembly.validate(new Uint8Array([0,97,115,109,1,0,0,0,1,5,1,96,0,1,123,3,2,1,0,10,10,1,8,0,253,12,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,11]));
  } catch(e) { return false; }
}

// ===== IndexedDB Cache =====
async function cachedFetch(url, key) {
  try {
    const db = await new Promise((res, rej) => {
      const r = indexedDB.open('facex-cache', 1);
      r.onupgradeneeded = () => r.result.createObjectStore('w');
      r.onsuccess = () => res(r.result);
      r.onerror = () => rej(r.error);
    });
    const cached = await new Promise(r => {
      const tx = db.transaction('w','readonly');
      const req = tx.objectStore('w').get(key);
      req.onsuccess = () => r(req.result); req.onerror = () => r(null);
    });
    if (cached) return new Uint8Array(cached);
    const buf = await fetch(url).then(r => r.arrayBuffer());
    try { const tx = db.transaction('w','readwrite'); tx.objectStore('w').put(buf, key); } catch(e) {}
    return new Uint8Array(buf);
  } catch(e) { return new Uint8Array(await fetch(url).then(r => r.arrayBuffer())); }
}

// ===== Init =====
async function init() {
  const s = $('status');
  if (!checkSimd()) {
    showError('WebAssembly SIMD not supported. Use Chrome 91+, Firefox 89+, or Safari 16.4+.');
    return;
  }
  try {
    s.textContent = 'Loading engines...'; s.className = 'status loading';
    [DetMod, FxMod] = await Promise.all([FaceDetModule(), FaceXModule()]);

    s.textContent = 'Loading weights (cached after first load)...';
    const [dw, fw] = await Promise.all([
      cachedFetch('det_500m_int8.bin', 'det'), cachedFetch('edgeface_xs_fp32.bin', 'emb')
    ]);
    DetMod.FS.writeFile('/d.bin', dw); FxMod.FS.writeFile('/e.bin', fw);

    detH = DetMod.cwrap('detect_init','number',['string'])('/d.bin');
    fxH = FxMod.cwrap('facex_init','number',['string','string'])('/e.bin', null);
    if (!detH || !fxH) throw new Error('Engine init failed');

    s.textContent = 'Ready — 74 KB engines loaded'; s.className = 'status ready';
    $('btnStart').disabled = false;
    $('resultBar').textContent = 'Click "Start Camera" to begin';
  } catch(e) { showError(e.message); }
}

function showError(msg) {
  $('status').textContent = 'Error'; $('status').className = 'status error';
  $('errorMsg').textContent = msg; $('errorMsg').style.display = 'block';
}

// ===== Camera =====
$('btnStart').onclick = async () => {
  try {
    const stream = await navigator.mediaDevices.getUserMedia({ video: { width: 320, height: 240, facingMode: 'user' }});
    video.srcObject = stream;
    video.onloadedmetadata = () => { overlay.width = video.videoWidth; overlay.height = video.videoHeight; };
    $('btnStart').disabled = true; $('btnStart').style.display = 'none';
    $('btnCapture').disabled = false;
    $('resultBar').textContent = 'Look at camera and click "Set Reference"';
  } catch(e) { showError('Camera access denied: ' + e.message); }
};

// ===== Detect =====
function runDetect() {
  const W = video.videoWidth, H = video.videoHeight;
  const ds = 160;
  const detCv = document.createElement('canvas'); detCv.width = ds; detCv.height = ds;
  const dCtx = detCv.getContext('2d', { willReadFrequently: true });
  const scale = Math.min(ds/W, ds/H);
  const nw = Math.round(W*scale), nh = Math.round(H*scale);
  const dx = (ds-nw)/2, dy = (ds-nh)/2;
  dCtx.fillStyle = '#000'; dCtx.fillRect(0,0,ds,ds);
  dCtx.drawImage(video, dx, dy, nw, nh);
  const img = dCtx.getImageData(0,0,ds,ds);

  const nPx = ds*ds*3;
  const inP = DetMod._malloc(nPx*4);
  const heap = DetMod.HEAPF32;
  const b = inP>>2;
  for (let i=0; i<ds*ds; i++) {
    heap[b+i*3] = img.data[i*4]/127.5-1; heap[b+i*3+1] = img.data[i*4+1]/127.5-1; heap[b+i*3+2] = img.data[i*4+2]/127.5-1;
  }
  const outP = DetMod._malloc(15*4*10);
  const df = DetMod.cwrap('detect_faces','number',['number','number','number','number','number','number']);
  const t0 = performance.now();
  const n = df(detH, inP, ds, ds, outP, 10);
  const detMs = performance.now() - t0;

  const faces = [];
  for (let i=0; i<n; i++) {
    const fb = (outP>>2)+i*15;
    const f = DetMod.HEAPF32;
    faces.push({
      x1:(f[fb]-dx)/scale, y1:(f[fb+1]-dy)/scale, x2:(f[fb+2]-dx)/scale, y2:(f[fb+3]-dy)/scale,
      score:f[fb+4], kps: Array.from({length:10}, (_,j) => (f[fb+5+j]-(j%2===0?dx:dy))/scale)
    });
  }
  DetMod._free(inP); DetMod._free(outP);
  return { faces, detMs };
}

// ===== Embed =====
function runEmbed(imgData) {
  const N=112*112*3;
  const inP = FxMod._malloc(N*4), outP = FxMod._malloc(512*4);
  const heap = FxMod.HEAPF32, b = inP>>2;
  for (let i=0; i<112*112; i++) {
    heap[b+i*3] = imgData.data[i*4]/127.5-1; heap[b+i*3+1] = imgData.data[i*4+1]/127.5-1; heap[b+i*3+2] = imgData.data[i*4+2]/127.5-1;
  }
  const t0 = performance.now();
  FxMod.cwrap('facex_embed','number',['number','number','number'])(fxH, inP, outP);
  const embMs = performance.now() - t0;
  const emb = new Float32Array(512);
  emb.set(heap.subarray(outP>>2, (outP>>2)+512));
  FxMod._free(inP); FxMod._free(outP);
  return { emb, embMs };
}

function cosSim(a,b) {
  let d=0,na=0,nb=0;
  for (let i=0;i<512;i++) { d+=a[i]*b[i]; na+=a[i]*a[i]; nb+=b[i]*b[i]; }
  return d/Math.sqrt(na*nb);
}

// ===== Align + Crop =====
function alignAndCrop(face) {
  const W = video.videoWidth, H = video.videoHeight;
  srcCv.width = W; srcCv.height = H;
  srcCtx.drawImage(video, 0, 0);
  const kps5 = [];
  for (let i=0; i<5; i++) kps5.push([face.kps[i*2], face.kps[i*2+1]]);
  return alignFace(srcCtx, W, H, kps5, cropCtxA);
}

// ===== Draw =====
function drawFaces(faces, isMatch) {
  ctx.clearRect(0,0,overlay.width,overlay.height);
  for (const f of faces) {
    ctx.strokeStyle = isMatch === undefined ? '#10b981' : (isMatch ? '#10b981' : '#ef4444');
    ctx.lineWidth = 2;
    ctx.strokeRect(f.x1, f.y1, f.x2-f.x1, f.y2-f.y1);
    ctx.fillStyle = ctx.strokeStyle;
    for (let j=0; j<5; j++) { ctx.beginPath(); ctx.arc(f.kps[j*2], f.kps[j*2+1], 2, 0, Math.PI*2); ctx.fill(); }
  }
}

// ===== Capture Reference =====
$('btnCapture').onclick = () => {
  const { faces } = runDetect();
  if (!faces.length) { $('resultBar').textContent = 'No face detected — look at camera'; $('resultBar').className = 'result-bar nomatch'; return; }
  const aligned = alignAndCrop(faces[0]);
  refCtx.putImageData(aligned, 0, 0);
  const { emb } = runEmbed(aligned);
  refEmb = emb;
  $('refBar').style.display = 'flex';
  $('btnVerify').style.display = 'inline-block'; $('btnVerify').disabled = false;
  $('resultBar').textContent = 'Reference set. Click "Verify".'; $('resultBar').className = 'result-bar idle';
  drawFaces(faces);
  liveness.reset();
};

// ===== Verify Loop =====
$('btnVerify').onclick = () => {
  running = true;
  $('btnVerify').style.display = 'none'; $('btnStop').style.display = 'inline-block';
  $('btnCapture').disabled = true;
  $('statsGrid').style.display = 'grid'; $('livenessBar').style.display = 'flex';
  loop();
};
$('btnStop').onclick = () => {
  running = false;
  $('btnStop').style.display = 'none'; $('btnVerify').style.display = 'inline-block'; $('btnVerify').disabled = false;
  $('btnCapture').disabled = false;
  ctx.clearRect(0,0,overlay.width,overlay.height);
  $('videoWrap').className = 'video-wrap';
};

function loop() {
  if (!running) return;
  const tAll = performance.now();
  const { faces, detMs } = runDetect();

  if (!faces.length) {
    drawFaces([]);
    $('resultBar').textContent = 'No face detected'; $('resultBar').className = 'result-bar idle';
    $('videoWrap').className = 'video-wrap';
    $('vDet').textContent = detMs.toFixed(0)+'ms';
    liveness.update(null);
    requestAnimationFrame(loop); return;
  }

  const aligned = alignAndCrop(faces[0]);
  const { emb, embMs } = runEmbed(aligned);
  const sim = cosSim(refEmb, emb);
  const match = sim > 0.3;
  const totalMs = performance.now() - tAll;

  // Liveness
  const live = liveness.update(faces[0]);
  $('livenessDot').className = 'liveness-dot' + (live.alive ? ' live' : '');
  $('livenessText').textContent = live.reason;

  drawFaces(faces, match);
  $('resultBar').textContent = match ? `MATCH — ${(sim*100).toFixed(1)}%` : `NO MATCH — ${(sim*100).toFixed(1)}%`;
  $('resultBar').className = 'result-bar ' + (match ? 'match' : 'nomatch');
  $('videoWrap').className = 'video-wrap ' + (match ? 'match' : 'nomatch');
  $('vDet').textContent = detMs.toFixed(0)+'ms';
  $('vEmb').textContent = embMs.toFixed(0)+'ms';
  $('vSim').textContent = (sim*100).toFixed(1)+'%';
  $('vFps').textContent = (1000/totalMs).toFixed(0);

  requestAnimationFrame(loop);
}

init();
</script>
</body>
</html>