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Browse files- README.md +26 -16
- index.html +868 -0
README.md
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---
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title:
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emoji:
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colorFrom: blue
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colorTo: green
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sdk:
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app_file: app.py
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pinned: false
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---
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#
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Phase
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2. Allow camera permission.
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3. Click **Record** in the webcam panel.
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4. Keep your face centered and well lit.
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5. The annotated output should update with face bounding boxes.
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---
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title: SentAI
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emoji: 🧠
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colorFrom: blue
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colorTo: green
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sdk: static
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app_file: index.html
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pinned: false
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short_description: Live face expression, age and gender estimates
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tags:
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- computer-vision
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- face-analysis
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- webcam
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- mobile
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# SentAI
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Phase 2 switches SentAI from a server-side Gradio prototype to a browser-side static app.
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The browser handles the camera stream and runs face-api.js models directly on the device, which should improve FPS and enables a front/rear camera toggle on many mobile browsers.
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## Current Phase 2 features
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- Live webcam video
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- Face bounding boxes
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- Possible feeling: Happy, Sad, Fear, Anger, Confused, Disgust
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- Apparent age range
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- Male/Female gender estimate
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- Front/rear camera toggle where supported by the browser
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- Responsive mobile-first UI
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- On-device FPS and latency display
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## Accuracy note
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These are appearance-based estimates from a camera frame. Lighting, face angle, glasses, camera quality, and dataset/model bias can affect results.
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index.html
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|
| 1 |
+
<!doctype html>
|
| 2 |
+
<html lang="en">
|
| 3 |
+
<head>
|
| 4 |
+
<meta charset="utf-8" />
|
| 5 |
+
<meta name="viewport" content="width=device-width, initial-scale=1, viewport-fit=cover" />
|
| 6 |
+
<meta name="theme-color" content="#050816" />
|
| 7 |
+
<title>SentAI</title>
|
| 8 |
+
<script defer src="https://cdn.jsdelivr.net/npm/face-api.js@0.22.2/dist/face-api.min.js"></script>
|
| 9 |
+
<style>
|
| 10 |
+
:root {
|
| 11 |
+
--bg-a: #050816;
|
| 12 |
+
--bg-b: #0d1b2f;
|
| 13 |
+
--card: rgba(15, 23, 42, 0.74);
|
| 14 |
+
--card-strong: rgba(15, 23, 42, 0.92);
|
| 15 |
+
--stroke: rgba(148, 163, 184, 0.22);
|
| 16 |
+
--text: #f8fafc;
|
| 17 |
+
--muted: #a7b4c8;
|
| 18 |
+
--soft: rgba(255,255,255,0.08);
|
| 19 |
+
--accent: #22d3ee;
|
| 20 |
+
--accent-2: #a78bfa;
|
| 21 |
+
--good: #2dd4bf;
|
| 22 |
+
--warn: #fbbf24;
|
| 23 |
+
--bad: #fb7185;
|
| 24 |
+
--shadow: 0 24px 90px rgba(0,0,0,0.42);
|
| 25 |
+
--radius: 28px;
|
| 26 |
+
font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
|
| 27 |
+
}
|
| 28 |
+
|
| 29 |
+
* { box-sizing: border-box; }
|
| 30 |
+
|
| 31 |
+
body {
|
| 32 |
+
margin: 0;
|
| 33 |
+
min-height: 100vh;
|
| 34 |
+
color: var(--text);
|
| 35 |
+
background:
|
| 36 |
+
radial-gradient(circle at 12% 10%, rgba(34, 211, 238, 0.26), transparent 34%),
|
| 37 |
+
radial-gradient(circle at 90% 0%, rgba(167, 139, 250, 0.24), transparent 34%),
|
| 38 |
+
linear-gradient(135deg, var(--bg-a), var(--bg-b) 52%, #112236);
|
| 39 |
+
overflow-x: hidden;
|
| 40 |
+
}
|
| 41 |
+
|
| 42 |
+
body::before {
|
| 43 |
+
content: "";
|
| 44 |
+
position: fixed;
|
| 45 |
+
inset: 0;
|
| 46 |
+
pointer-events: none;
|
| 47 |
+
background-image:
|
| 48 |
+
linear-gradient(rgba(255,255,255,0.035) 1px, transparent 1px),
|
| 49 |
+
linear-gradient(90deg, rgba(255,255,255,0.035) 1px, transparent 1px);
|
| 50 |
+
background-size: 44px 44px;
|
| 51 |
+
mask-image: radial-gradient(circle at 50% 20%, black 0%, transparent 75%);
|
| 52 |
+
}
|
| 53 |
+
|
| 54 |
+
.app-shell {
|
| 55 |
+
width: min(1440px, calc(100% - 32px));
|
| 56 |
+
margin: 0 auto;
|
| 57 |
+
padding: 34px 0 42px;
|
| 58 |
+
position: relative;
|
| 59 |
+
z-index: 1;
|
| 60 |
+
}
|
| 61 |
+
|
| 62 |
+
header.hero {
|
| 63 |
+
display: grid;
|
| 64 |
+
grid-template-columns: 1fr auto;
|
| 65 |
+
align-items: center;
|
| 66 |
+
gap: 22px;
|
| 67 |
+
margin-bottom: 26px;
|
| 68 |
+
}
|
| 69 |
+
|
| 70 |
+
.brand h1 {
|
| 71 |
+
margin: 0;
|
| 72 |
+
font-size: clamp(3rem, 8vw, 7rem);
|
| 73 |
+
line-height: 0.92;
|
| 74 |
+
letter-spacing: -0.08em;
|
| 75 |
+
font-weight: 900;
|
| 76 |
+
text-shadow: 0 24px 70px rgba(34, 211, 238, 0.1);
|
| 77 |
+
}
|
| 78 |
+
|
| 79 |
+
.brand p {
|
| 80 |
+
margin: 18px 0 0;
|
| 81 |
+
max-width: 870px;
|
| 82 |
+
color: var(--muted);
|
| 83 |
+
font-size: clamp(1rem, 1.8vw, 1.3rem);
|
| 84 |
+
line-height: 1.55;
|
| 85 |
+
}
|
| 86 |
+
|
| 87 |
+
.status-pill {
|
| 88 |
+
display: inline-flex;
|
| 89 |
+
align-items: center;
|
| 90 |
+
gap: 10px;
|
| 91 |
+
border: 1px solid var(--stroke);
|
| 92 |
+
background: rgba(15, 23, 42, 0.6);
|
| 93 |
+
backdrop-filter: blur(18px);
|
| 94 |
+
border-radius: 999px;
|
| 95 |
+
padding: 12px 16px;
|
| 96 |
+
color: var(--muted);
|
| 97 |
+
box-shadow: var(--shadow);
|
| 98 |
+
white-space: nowrap;
|
| 99 |
+
font-weight: 700;
|
| 100 |
+
}
|
| 101 |
+
|
| 102 |
+
.dot {
|
| 103 |
+
width: 10px;
|
| 104 |
+
height: 10px;
|
| 105 |
+
border-radius: 50%;
|
| 106 |
+
background: var(--warn);
|
| 107 |
+
box-shadow: 0 0 18px var(--warn);
|
| 108 |
+
}
|
| 109 |
+
|
| 110 |
+
.dot.ready { background: var(--good); box-shadow: 0 0 18px var(--good); }
|
| 111 |
+
.dot.error { background: var(--bad); box-shadow: 0 0 18px var(--bad); }
|
| 112 |
+
|
| 113 |
+
.toolbar {
|
| 114 |
+
display: flex;
|
| 115 |
+
flex-wrap: wrap;
|
| 116 |
+
gap: 12px;
|
| 117 |
+
align-items: center;
|
| 118 |
+
margin-bottom: 18px;
|
| 119 |
+
}
|
| 120 |
+
|
| 121 |
+
button, select {
|
| 122 |
+
appearance: none;
|
| 123 |
+
border: 1px solid var(--stroke);
|
| 124 |
+
background: rgba(15, 23, 42, 0.74);
|
| 125 |
+
color: var(--text);
|
| 126 |
+
border-radius: 999px;
|
| 127 |
+
padding: 13px 18px;
|
| 128 |
+
font-size: 0.98rem;
|
| 129 |
+
font-weight: 800;
|
| 130 |
+
letter-spacing: -0.01em;
|
| 131 |
+
cursor: pointer;
|
| 132 |
+
transition: transform 160ms ease, border-color 160ms ease, background 160ms ease, opacity 160ms ease;
|
| 133 |
+
min-height: 48px;
|
| 134 |
+
}
|
| 135 |
+
|
| 136 |
+
button:hover, select:hover { transform: translateY(-1px); border-color: rgba(34, 211, 238, 0.55); }
|
| 137 |
+
button:active { transform: translateY(0); }
|
| 138 |
+
button.primary { background: linear-gradient(135deg, rgba(34,211,238,0.95), rgba(167,139,250,0.92)); color: #06111f; border-color: transparent; }
|
| 139 |
+
button.danger { color: #fecdd3; }
|
| 140 |
+
button:disabled { opacity: 0.46; cursor: not-allowed; transform: none; }
|
| 141 |
+
|
| 142 |
+
.camera-tag {
|
| 143 |
+
padding: 12px 16px;
|
| 144 |
+
min-height: 48px;
|
| 145 |
+
display: inline-flex;
|
| 146 |
+
align-items: center;
|
| 147 |
+
border-radius: 999px;
|
| 148 |
+
border: 1px solid var(--stroke);
|
| 149 |
+
background: rgba(255,255,255,0.055);
|
| 150 |
+
color: var(--muted);
|
| 151 |
+
font-weight: 800;
|
| 152 |
+
}
|
| 153 |
+
|
| 154 |
+
.grid {
|
| 155 |
+
display: grid;
|
| 156 |
+
grid-template-columns: minmax(0, 1.45fr) minmax(330px, 0.72fr);
|
| 157 |
+
gap: 18px;
|
| 158 |
+
align-items: stretch;
|
| 159 |
+
}
|
| 160 |
+
|
| 161 |
+
.panel {
|
| 162 |
+
background: var(--card);
|
| 163 |
+
border: 1px solid var(--stroke);
|
| 164 |
+
border-radius: var(--radius);
|
| 165 |
+
box-shadow: var(--shadow);
|
| 166 |
+
backdrop-filter: blur(22px);
|
| 167 |
+
overflow: hidden;
|
| 168 |
+
}
|
| 169 |
+
|
| 170 |
+
.stage-panel { padding: 14px; }
|
| 171 |
+
|
| 172 |
+
.stage {
|
| 173 |
+
position: relative;
|
| 174 |
+
width: 100%;
|
| 175 |
+
aspect-ratio: 4 / 3;
|
| 176 |
+
border-radius: calc(var(--radius) - 10px);
|
| 177 |
+
overflow: hidden;
|
| 178 |
+
background:
|
| 179 |
+
radial-gradient(circle at 50% 30%, rgba(34,211,238,0.09), transparent 36%),
|
| 180 |
+
#020617;
|
| 181 |
+
border: 1px solid rgba(148, 163, 184, 0.18);
|
| 182 |
+
}
|
| 183 |
+
|
| 184 |
+
video, canvas#overlay {
|
| 185 |
+
position: absolute;
|
| 186 |
+
inset: 0;
|
| 187 |
+
width: 100%;
|
| 188 |
+
height: 100%;
|
| 189 |
+
object-fit: contain;
|
| 190 |
+
}
|
| 191 |
+
|
| 192 |
+
video {
|
| 193 |
+
background: #020617;
|
| 194 |
+
}
|
| 195 |
+
|
| 196 |
+
canvas#overlay {
|
| 197 |
+
pointer-events: none;
|
| 198 |
+
}
|
| 199 |
+
|
| 200 |
+
.empty-state {
|
| 201 |
+
position: absolute;
|
| 202 |
+
inset: 0;
|
| 203 |
+
display: grid;
|
| 204 |
+
place-items: center;
|
| 205 |
+
padding: 28px;
|
| 206 |
+
text-align: center;
|
| 207 |
+
color: var(--muted);
|
| 208 |
+
pointer-events: none;
|
| 209 |
+
}
|
| 210 |
+
|
| 211 |
+
.empty-card {
|
| 212 |
+
max-width: 560px;
|
| 213 |
+
border: 1px solid var(--stroke);
|
| 214 |
+
background: rgba(15,23,42,0.68);
|
| 215 |
+
border-radius: 24px;
|
| 216 |
+
padding: 28px;
|
| 217 |
+
}
|
| 218 |
+
|
| 219 |
+
.empty-card strong {
|
| 220 |
+
display: block;
|
| 221 |
+
color: var(--text);
|
| 222 |
+
font-size: clamp(1.35rem, 3vw, 2.2rem);
|
| 223 |
+
margin-bottom: 12px;
|
| 224 |
+
}
|
| 225 |
+
|
| 226 |
+
.side {
|
| 227 |
+
padding: 18px;
|
| 228 |
+
display: grid;
|
| 229 |
+
gap: 14px;
|
| 230 |
+
align-content: start;
|
| 231 |
+
}
|
| 232 |
+
|
| 233 |
+
.side h2 {
|
| 234 |
+
margin: 2px 0 4px;
|
| 235 |
+
font-size: 1.35rem;
|
| 236 |
+
letter-spacing: -0.04em;
|
| 237 |
+
}
|
| 238 |
+
|
| 239 |
+
.metric-grid {
|
| 240 |
+
display: grid;
|
| 241 |
+
grid-template-columns: repeat(2, minmax(0, 1fr));
|
| 242 |
+
gap: 12px;
|
| 243 |
+
}
|
| 244 |
+
|
| 245 |
+
.metric {
|
| 246 |
+
border: 1px solid var(--stroke);
|
| 247 |
+
background: rgba(255,255,255,0.055);
|
| 248 |
+
border-radius: 22px;
|
| 249 |
+
padding: 16px;
|
| 250 |
+
min-height: 112px;
|
| 251 |
+
}
|
| 252 |
+
|
| 253 |
+
.metric span {
|
| 254 |
+
display: block;
|
| 255 |
+
color: var(--muted);
|
| 256 |
+
font-size: 0.82rem;
|
| 257 |
+
font-weight: 800;
|
| 258 |
+
text-transform: uppercase;
|
| 259 |
+
letter-spacing: 0.08em;
|
| 260 |
+
}
|
| 261 |
+
|
| 262 |
+
.metric strong {
|
| 263 |
+
display: block;
|
| 264 |
+
margin-top: 10px;
|
| 265 |
+
font-size: clamp(1.55rem, 3.5vw, 2.25rem);
|
| 266 |
+
letter-spacing: -0.06em;
|
| 267 |
+
line-height: 1;
|
| 268 |
+
}
|
| 269 |
+
|
| 270 |
+
.metric small {
|
| 271 |
+
display: block;
|
| 272 |
+
margin-top: 7px;
|
| 273 |
+
color: var(--muted);
|
| 274 |
+
font-weight: 700;
|
| 275 |
+
}
|
| 276 |
+
|
| 277 |
+
.wide { grid-column: 1 / -1; }
|
| 278 |
+
|
| 279 |
+
.bars {
|
| 280 |
+
border: 1px solid var(--stroke);
|
| 281 |
+
background: rgba(255,255,255,0.055);
|
| 282 |
+
border-radius: 22px;
|
| 283 |
+
padding: 16px;
|
| 284 |
+
}
|
| 285 |
+
|
| 286 |
+
.bars h3 {
|
| 287 |
+
margin: 0 0 14px;
|
| 288 |
+
font-size: 1rem;
|
| 289 |
+
color: var(--text);
|
| 290 |
+
letter-spacing: -0.02em;
|
| 291 |
+
}
|
| 292 |
+
|
| 293 |
+
.bar-row {
|
| 294 |
+
display: grid;
|
| 295 |
+
grid-template-columns: 86px 1fr 48px;
|
| 296 |
+
gap: 10px;
|
| 297 |
+
align-items: center;
|
| 298 |
+
margin: 11px 0;
|
| 299 |
+
color: var(--muted);
|
| 300 |
+
font-size: 0.9rem;
|
| 301 |
+
font-weight: 800;
|
| 302 |
+
}
|
| 303 |
+
|
| 304 |
+
.bar-track {
|
| 305 |
+
height: 9px;
|
| 306 |
+
border-radius: 99px;
|
| 307 |
+
background: rgba(148,163,184,0.2);
|
| 308 |
+
overflow: hidden;
|
| 309 |
+
}
|
| 310 |
+
|
| 311 |
+
.bar-fill {
|
| 312 |
+
width: 0%;
|
| 313 |
+
height: 100%;
|
| 314 |
+
border-radius: inherit;
|
| 315 |
+
background: linear-gradient(90deg, var(--accent), var(--accent-2));
|
| 316 |
+
transition: width 180ms ease;
|
| 317 |
+
}
|
| 318 |
+
|
| 319 |
+
.note {
|
| 320 |
+
border: 1px solid rgba(34,211,238,0.25);
|
| 321 |
+
background: rgba(34,211,238,0.08);
|
| 322 |
+
color: #cffafe;
|
| 323 |
+
border-radius: 22px;
|
| 324 |
+
padding: 15px 16px;
|
| 325 |
+
line-height: 1.5;
|
| 326 |
+
font-size: 0.94rem;
|
| 327 |
+
}
|
| 328 |
+
|
| 329 |
+
.toast {
|
| 330 |
+
position: fixed;
|
| 331 |
+
left: 50%;
|
| 332 |
+
bottom: 22px;
|
| 333 |
+
transform: translateX(-50%) translateY(30px);
|
| 334 |
+
opacity: 0;
|
| 335 |
+
z-index: 10;
|
| 336 |
+
background: rgba(2, 6, 23, 0.94);
|
| 337 |
+
border: 1px solid var(--stroke);
|
| 338 |
+
border-radius: 999px;
|
| 339 |
+
padding: 13px 18px;
|
| 340 |
+
box-shadow: var(--shadow);
|
| 341 |
+
color: var(--text);
|
| 342 |
+
font-weight: 800;
|
| 343 |
+
transition: opacity 180ms ease, transform 180ms ease;
|
| 344 |
+
max-width: min(92vw, 720px);
|
| 345 |
+
text-align: center;
|
| 346 |
+
}
|
| 347 |
+
|
| 348 |
+
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
|
| 349 |
+
|
| 350 |
+
@media (max-width: 980px) {
|
| 351 |
+
.app-shell { width: min(100% - 20px, 760px); padding-top: 22px; }
|
| 352 |
+
header.hero { grid-template-columns: 1fr; }
|
| 353 |
+
.status-pill { width: fit-content; }
|
| 354 |
+
.grid { grid-template-columns: 1fr; }
|
| 355 |
+
.stage-panel { padding: 10px; }
|
| 356 |
+
.side { padding: 14px; }
|
| 357 |
+
.toolbar { gap: 9px; }
|
| 358 |
+
button, select, .camera-tag { flex: 1 1 150px; justify-content: center; }
|
| 359 |
+
}
|
| 360 |
+
|
| 361 |
+
@media (max-width: 560px) {
|
| 362 |
+
.brand h1 { font-size: clamp(3.6rem, 19vw, 5.4rem); }
|
| 363 |
+
.brand p { font-size: 0.98rem; }
|
| 364 |
+
.metric-grid { grid-template-columns: 1fr; }
|
| 365 |
+
.bar-row { grid-template-columns: 76px 1fr 44px; font-size: 0.82rem; }
|
| 366 |
+
.empty-card { padding: 20px; }
|
| 367 |
+
.app-shell { width: min(100% - 14px, 760px); }
|
| 368 |
+
body { background-attachment: fixed; }
|
| 369 |
+
}
|
| 370 |
+
</style>
|
| 371 |
+
</head>
|
| 372 |
+
<body>
|
| 373 |
+
<main class="app-shell">
|
| 374 |
+
<header class="hero" aria-label="SentAI heading">
|
| 375 |
+
<div class="brand">
|
| 376 |
+
<h1>SentAI</h1>
|
| 377 |
+
<p>Live face boxes with possible feeling, apparent age range, and male/female gender estimate. Runs in the browser for faster desktop and mobile camera performance.</p>
|
| 378 |
+
</div>
|
| 379 |
+
<div class="status-pill" aria-live="polite"><span id="modelDot" class="dot"></span><span id="modelStatus">Loading AI models...</span></div>
|
| 380 |
+
</header>
|
| 381 |
+
|
| 382 |
+
<section class="toolbar" aria-label="Camera controls">
|
| 383 |
+
<button id="startBtn" class="primary" disabled>Start camera</button>
|
| 384 |
+
<button id="switchBtn" disabled>Switch front/rear</button>
|
| 385 |
+
<button id="stopBtn" class="danger" disabled>Stop</button>
|
| 386 |
+
<select id="modeSelect" aria-label="Performance mode">
|
| 387 |
+
<option value="fast">Fast mode</option>
|
| 388 |
+
<option value="balanced" selected>Balanced mode</option>
|
| 389 |
+
<option value="accurate">Accurate mode</option>
|
| 390 |
+
</select>
|
| 391 |
+
<span id="cameraTag" class="camera-tag">Camera: not started</span>
|
| 392 |
+
</section>
|
| 393 |
+
|
| 394 |
+
<section class="grid">
|
| 395 |
+
<div class="panel stage-panel">
|
| 396 |
+
<div id="stage" class="stage">
|
| 397 |
+
<video id="video" autoplay muted playsinline></video>
|
| 398 |
+
<canvas id="overlay"></canvas>
|
| 399 |
+
<div id="emptyState" class="empty-state">
|
| 400 |
+
<div class="empty-card">
|
| 401 |
+
<strong>Ready for live analysis</strong>
|
| 402 |
+
Tap <b>Start camera</b>, allow permission, then keep one face well-lit and centered. On phones, use <b>Switch front/rear</b> to toggle cameras when supported by the browser.
|
| 403 |
+
</div>
|
| 404 |
+
</div>
|
| 405 |
+
</div>
|
| 406 |
+
</div>
|
| 407 |
+
|
| 408 |
+
<aside class="panel side" aria-label="Live analysis panel">
|
| 409 |
+
<h2>Live details</h2>
|
| 410 |
+
<div class="metric-grid">
|
| 411 |
+
<div class="metric">
|
| 412 |
+
<span>Possible feeling</span>
|
| 413 |
+
<strong id="feelingValue">—</strong>
|
| 414 |
+
<small id="feelingConfidence">Waiting</small>
|
| 415 |
+
</div>
|
| 416 |
+
<div class="metric">
|
| 417 |
+
<span>Gender</span>
|
| 418 |
+
<strong id="genderValue">—</strong>
|
| 419 |
+
<small id="genderConfidence">Waiting</small>
|
| 420 |
+
</div>
|
| 421 |
+
<div class="metric">
|
| 422 |
+
<span>Apparent age</span>
|
| 423 |
+
<strong id="ageValue">—</strong>
|
| 424 |
+
<small>Range estimate</small>
|
| 425 |
+
</div>
|
| 426 |
+
<div class="metric">
|
| 427 |
+
<span>Faces</span>
|
| 428 |
+
<strong id="facesValue">0</strong>
|
| 429 |
+
<small id="faceScore">No face yet</small>
|
| 430 |
+
</div>
|
| 431 |
+
<div class="metric">
|
| 432 |
+
<span>FPS</span>
|
| 433 |
+
<strong id="fpsValue">—</strong>
|
| 434 |
+
<small>On-device loop</small>
|
| 435 |
+
</div>
|
| 436 |
+
<div class="metric">
|
| 437 |
+
<span>Latency</span>
|
| 438 |
+
<strong id="latencyValue">—</strong>
|
| 439 |
+
<small>Model time</small>
|
| 440 |
+
</div>
|
| 441 |
+
</div>
|
| 442 |
+
|
| 443 |
+
<div class="bars wide">
|
| 444 |
+
<h3>Feeling scores</h3>
|
| 445 |
+
<div id="emotionBars"></div>
|
| 446 |
+
</div>
|
| 447 |
+
|
| 448 |
+
<div class="note wide">
|
| 449 |
+
Results are estimates from facial appearance and expression. Lighting, pose, glasses, camera quality, and model bias can affect accuracy.
|
| 450 |
+
</div>
|
| 451 |
+
</aside>
|
| 452 |
+
</section>
|
| 453 |
+
</main>
|
| 454 |
+
|
| 455 |
+
<div id="toast" class="toast" role="status" aria-live="polite"></div>
|
| 456 |
+
|
| 457 |
+
<script>
|
| 458 |
+
const MODEL_URL = "https://cdn.jsdelivr.net/gh/justadudewhohacks/face-api.js@0.22.2/weights";
|
| 459 |
+
|
| 460 |
+
const els = {
|
| 461 |
+
modelDot: document.getElementById("modelDot"),
|
| 462 |
+
modelStatus: document.getElementById("modelStatus"),
|
| 463 |
+
startBtn: document.getElementById("startBtn"),
|
| 464 |
+
switchBtn: document.getElementById("switchBtn"),
|
| 465 |
+
stopBtn: document.getElementById("stopBtn"),
|
| 466 |
+
modeSelect: document.getElementById("modeSelect"),
|
| 467 |
+
cameraTag: document.getElementById("cameraTag"),
|
| 468 |
+
video: document.getElementById("video"),
|
| 469 |
+
overlay: document.getElementById("overlay"),
|
| 470 |
+
stage: document.getElementById("stage"),
|
| 471 |
+
emptyState: document.getElementById("emptyState"),
|
| 472 |
+
feelingValue: document.getElementById("feelingValue"),
|
| 473 |
+
feelingConfidence: document.getElementById("feelingConfidence"),
|
| 474 |
+
genderValue: document.getElementById("genderValue"),
|
| 475 |
+
genderConfidence: document.getElementById("genderConfidence"),
|
| 476 |
+
ageValue: document.getElementById("ageValue"),
|
| 477 |
+
facesValue: document.getElementById("facesValue"),
|
| 478 |
+
faceScore: document.getElementById("faceScore"),
|
| 479 |
+
fpsValue: document.getElementById("fpsValue"),
|
| 480 |
+
latencyValue: document.getElementById("latencyValue"),
|
| 481 |
+
emotionBars: document.getElementById("emotionBars"),
|
| 482 |
+
toast: document.getElementById("toast"),
|
| 483 |
+
};
|
| 484 |
+
|
| 485 |
+
const modes = {
|
| 486 |
+
fast: { inputSize: 224, scoreThreshold: 0.48, interval: 35 },
|
| 487 |
+
balanced: { inputSize: 320, scoreThreshold: 0.45, interval: 55 },
|
| 488 |
+
accurate: { inputSize: 416, scoreThreshold: 0.4, interval: 90 },
|
| 489 |
+
};
|
| 490 |
+
|
| 491 |
+
const emotionLabels = ["Happy", "Sad", "Fear", "Anger", "Confused", "Disgust"];
|
| 492 |
+
const ctx = els.overlay.getContext("2d");
|
| 493 |
+
let modelsReady = false;
|
| 494 |
+
let stream = null;
|
| 495 |
+
let running = false;
|
| 496 |
+
let detecting = false;
|
| 497 |
+
let currentFacing = "user";
|
| 498 |
+
let lastLoopTime = performance.now();
|
| 499 |
+
let fpsSmooth = 0;
|
| 500 |
+
let lastDetections = [];
|
| 501 |
+
|
| 502 |
+
function setModelStatus(text, kind = "loading") {
|
| 503 |
+
els.modelStatus.textContent = text;
|
| 504 |
+
els.modelDot.classList.remove("ready", "error");
|
| 505 |
+
if (kind === "ready") els.modelDot.classList.add("ready");
|
| 506 |
+
if (kind === "error") els.modelDot.classList.add("error");
|
| 507 |
+
}
|
| 508 |
+
|
| 509 |
+
function showToast(message) {
|
| 510 |
+
els.toast.textContent = message;
|
| 511 |
+
els.toast.classList.add("show");
|
| 512 |
+
clearTimeout(showToast.timer);
|
| 513 |
+
showToast.timer = setTimeout(() => els.toast.classList.remove("show"), 3200);
|
| 514 |
+
}
|
| 515 |
+
|
| 516 |
+
function percent(value) {
|
| 517 |
+
return `${Math.round(Math.max(0, Math.min(1, value || 0)) * 100)}%`;
|
| 518 |
+
}
|
| 519 |
+
|
| 520 |
+
function ageRange(age) {
|
| 521 |
+
if (!Number.isFinite(age)) return "—";
|
| 522 |
+
const a = Math.max(0, Math.round(age));
|
| 523 |
+
if (a <= 12) return "0-12";
|
| 524 |
+
if (a <= 17) return "13-17";
|
| 525 |
+
if (a <= 24) return "18-24";
|
| 526 |
+
if (a <= 34) return "25-34";
|
| 527 |
+
if (a <= 44) return "35-44";
|
| 528 |
+
if (a <= 54) return "45-54";
|
| 529 |
+
if (a <= 64) return "55-64";
|
| 530 |
+
return "65+";
|
| 531 |
+
}
|
| 532 |
+
|
| 533 |
+
function makeEmotionScores(expressions = {}) {
|
| 534 |
+
const raw = {
|
| 535 |
+
happy: expressions.happy || 0,
|
| 536 |
+
sad: expressions.sad || 0,
|
| 537 |
+
fearful: expressions.fearful || 0,
|
| 538 |
+
angry: expressions.angry || 0,
|
| 539 |
+
disgusted: expressions.disgusted || 0,
|
| 540 |
+
surprised: expressions.surprised || 0,
|
| 541 |
+
neutral: expressions.neutral || 0,
|
| 542 |
+
};
|
| 543 |
+
|
| 544 |
+
const mapped = {
|
| 545 |
+
Happy: raw.happy,
|
| 546 |
+
Sad: raw.sad,
|
| 547 |
+
Fear: raw.fearful,
|
| 548 |
+
Anger: raw.angry,
|
| 549 |
+
Disgust: raw.disgusted,
|
| 550 |
+
Confused: Math.max(raw.surprised, raw.neutral * 0.86),
|
| 551 |
+
};
|
| 552 |
+
|
| 553 |
+
const sorted = Object.entries(mapped).sort((a, b) => b[1] - a[1]);
|
| 554 |
+
const top = sorted[0] || ["Confused", 0];
|
| 555 |
+
const second = sorted[1] || ["", 0];
|
| 556 |
+
if ((top[1] - second[1]) < 0.08 || top[1] < 0.34) {
|
| 557 |
+
return { label: "Confused", score: Math.max(mapped.Confused, 0.42), mapped };
|
| 558 |
+
}
|
| 559 |
+
return { label: top[0], score: top[1], mapped };
|
| 560 |
+
}
|
| 561 |
+
|
| 562 |
+
function makeInsight(det) {
|
| 563 |
+
const emotion = makeEmotionScores(det.expressions);
|
| 564 |
+
const genderRaw = (det.gender || "").toLowerCase() === "female" ? "Female" : "Male";
|
| 565 |
+
return {
|
| 566 |
+
emotionLabel: emotion.label,
|
| 567 |
+
emotionScore: emotion.score,
|
| 568 |
+
emotionScores: emotion.mapped,
|
| 569 |
+
gender: genderRaw,
|
| 570 |
+
genderScore: det.genderProbability || 0,
|
| 571 |
+
ageRange: ageRange(det.age),
|
| 572 |
+
faceScore: det.detection && det.detection.score ? det.detection.score : 0,
|
| 573 |
+
};
|
| 574 |
+
}
|
| 575 |
+
|
| 576 |
+
function renderBars(scores = {}) {
|
| 577 |
+
els.emotionBars.innerHTML = emotionLabels.map(label => {
|
| 578 |
+
const value = scores[label] || 0;
|
| 579 |
+
return `
|
| 580 |
+
<div class="bar-row">
|
| 581 |
+
<span>${label}</span>
|
| 582 |
+
<div class="bar-track"><div class="bar-fill" style="width:${Math.round(value * 100)}%"></div></div>
|
| 583 |
+
<span>${percent(value)}</span>
|
| 584 |
+
</div>`;
|
| 585 |
+
}).join("");
|
| 586 |
+
}
|
| 587 |
+
|
| 588 |
+
function resetDetails() {
|
| 589 |
+
els.feelingValue.textContent = "—";
|
| 590 |
+
els.feelingConfidence.textContent = "Waiting";
|
| 591 |
+
els.genderValue.textContent = "—";
|
| 592 |
+
els.genderConfidence.textContent = "Waiting";
|
| 593 |
+
els.ageValue.textContent = "—";
|
| 594 |
+
els.facesValue.textContent = "0";
|
| 595 |
+
els.faceScore.textContent = "No face yet";
|
| 596 |
+
renderBars({});
|
| 597 |
+
}
|
| 598 |
+
|
| 599 |
+
function choosePrimary(detections) {
|
| 600 |
+
if (!detections || !detections.length) return null;
|
| 601 |
+
return detections.slice().sort((a, b) => {
|
| 602 |
+
const ab = a.detection.box;
|
| 603 |
+
const bb = b.detection.box;
|
| 604 |
+
return (bb.width * bb.height) - (ab.width * ab.height);
|
| 605 |
+
})[0];
|
| 606 |
+
}
|
| 607 |
+
|
| 608 |
+
function updateDetails(detections, elapsedMs) {
|
| 609 |
+
els.facesValue.textContent = String(detections.length);
|
| 610 |
+
els.latencyValue.textContent = `${Math.round(elapsedMs)}ms`;
|
| 611 |
+
|
| 612 |
+
const now = performance.now();
|
| 613 |
+
const instantFps = 1000 / Math.max(1, now - lastLoopTime);
|
| 614 |
+
lastLoopTime = now;
|
| 615 |
+
fpsSmooth = fpsSmooth ? (fpsSmooth * 0.82 + instantFps * 0.18) : instantFps;
|
| 616 |
+
els.fpsValue.textContent = fpsSmooth.toFixed(1);
|
| 617 |
+
|
| 618 |
+
const primary = choosePrimary(detections);
|
| 619 |
+
if (!primary) {
|
| 620 |
+
els.feelingValue.textContent = "—";
|
| 621 |
+
els.feelingConfidence.textContent = "No face";
|
| 622 |
+
els.genderValue.textContent = "—";
|
| 623 |
+
els.genderConfidence.textContent = "No face";
|
| 624 |
+
els.ageValue.textContent = "—";
|
| 625 |
+
els.faceScore.textContent = "No face yet";
|
| 626 |
+
renderBars({});
|
| 627 |
+
return;
|
| 628 |
+
}
|
| 629 |
+
|
| 630 |
+
const insight = makeInsight(primary);
|
| 631 |
+
els.feelingValue.textContent = insight.emotionLabel;
|
| 632 |
+
els.feelingConfidence.textContent = `${percent(insight.emotionScore)} confidence`;
|
| 633 |
+
els.genderValue.textContent = insight.gender;
|
| 634 |
+
els.genderConfidence.textContent = `${percent(insight.genderScore)} confidence`;
|
| 635 |
+
els.ageValue.textContent = insight.ageRange;
|
| 636 |
+
els.faceScore.textContent = `${percent(insight.faceScore)} face score`;
|
| 637 |
+
renderBars(insight.emotionScores);
|
| 638 |
+
}
|
| 639 |
+
|
| 640 |
+
function drawRoundRect(context, x, y, w, h, r) {
|
| 641 |
+
const radius = Math.min(r, w / 2, h / 2);
|
| 642 |
+
context.beginPath();
|
| 643 |
+
context.moveTo(x + radius, y);
|
| 644 |
+
context.arcTo(x + w, y, x + w, y + h, radius);
|
| 645 |
+
context.arcTo(x + w, y + h, x, y + h, radius);
|
| 646 |
+
context.arcTo(x, y + h, x, y, radius);
|
| 647 |
+
context.arcTo(x, y, x + w, y, radius);
|
| 648 |
+
context.closePath();
|
| 649 |
+
}
|
| 650 |
+
|
| 651 |
+
function drawCornerBox(x, y, w, h) {
|
| 652 |
+
const line = Math.max(4, els.overlay.width / 180);
|
| 653 |
+
const len = Math.max(26, Math.min(w, h) * 0.22);
|
| 654 |
+
ctx.lineWidth = line;
|
| 655 |
+
ctx.strokeStyle = "#22d3ee";
|
| 656 |
+
ctx.shadowColor = "rgba(34,211,238,0.85)";
|
| 657 |
+
ctx.shadowBlur = 14;
|
| 658 |
+
ctx.beginPath();
|
| 659 |
+
ctx.moveTo(x, y + len); ctx.lineTo(x, y); ctx.lineTo(x + len, y);
|
| 660 |
+
ctx.moveTo(x + w - len, y); ctx.lineTo(x + w, y); ctx.lineTo(x + w, y + len);
|
| 661 |
+
ctx.moveTo(x + w, y + h - len); ctx.lineTo(x + w, y + h); ctx.lineTo(x + w - len, y + h);
|
| 662 |
+
ctx.moveTo(x + len, y + h); ctx.lineTo(x, y + h); ctx.lineTo(x, y + h - len);
|
| 663 |
+
ctx.stroke();
|
| 664 |
+
ctx.shadowBlur = 0;
|
| 665 |
+
|
| 666 |
+
ctx.lineWidth = Math.max(2, line * 0.55);
|
| 667 |
+
ctx.strokeStyle = "rgba(255,255,255,0.95)";
|
| 668 |
+
drawRoundRect(ctx, x, y, w, h, 16);
|
| 669 |
+
ctx.stroke();
|
| 670 |
+
}
|
| 671 |
+
|
| 672 |
+
function drawLabel(x, y, w, insight) {
|
| 673 |
+
const scale = Math.max(1, els.overlay.width / 850);
|
| 674 |
+
const padX = 12 * scale;
|
| 675 |
+
const padY = 8 * scale;
|
| 676 |
+
const font1 = Math.round(18 * scale);
|
| 677 |
+
const font2 = Math.round(14 * scale);
|
| 678 |
+
const lineH = font1 + 9 * scale;
|
| 679 |
+
const label1 = `${insight.emotionLabel} ${percent(insight.emotionScore)}`;
|
| 680 |
+
const label2 = `${insight.gender} ${percent(insight.genderScore)} · Age ${insight.ageRange}`;
|
| 681 |
+
|
| 682 |
+
ctx.font = `900 ${font1}px Inter, system-ui, sans-serif`;
|
| 683 |
+
const textW = Math.max(ctx.measureText(label1).width, ctx.measureText(label2).width);
|
| 684 |
+
const boxW = Math.min(Math.max(textW + padX * 2, w * 0.72), els.overlay.width - 16);
|
| 685 |
+
const boxH = lineH * 2 + padY * 1.6;
|
| 686 |
+
const bx = Math.max(8, Math.min(x, els.overlay.width - boxW - 8));
|
| 687 |
+
const by = Math.max(8, y - boxH - 8);
|
| 688 |
+
|
| 689 |
+
drawRoundRect(ctx, bx, by, boxW, boxH, 14 * scale);
|
| 690 |
+
ctx.fillStyle = "rgba(2, 6, 23, 0.84)";
|
| 691 |
+
ctx.fill();
|
| 692 |
+
ctx.strokeStyle = "rgba(34, 211, 238, 0.65)";
|
| 693 |
+
ctx.lineWidth = 1.5 * scale;
|
| 694 |
+
ctx.stroke();
|
| 695 |
+
|
| 696 |
+
ctx.fillStyle = "#ecfeff";
|
| 697 |
+
ctx.font = `900 ${font1}px Inter, system-ui, sans-serif`;
|
| 698 |
+
ctx.fillText(label1, bx + padX, by + padY + font1);
|
| 699 |
+
ctx.fillStyle = "#a7b4c8";
|
| 700 |
+
ctx.font = `800 ${font2}px Inter, system-ui, sans-serif`;
|
| 701 |
+
ctx.fillText(label2, bx + padX, by + padY + font1 + lineH);
|
| 702 |
+
}
|
| 703 |
+
|
| 704 |
+
function drawDetections(detections) {
|
| 705 |
+
ctx.clearRect(0, 0, els.overlay.width, els.overlay.height);
|
| 706 |
+
lastDetections = detections;
|
| 707 |
+
for (const det of detections) {
|
| 708 |
+
const box = det.detection.box;
|
| 709 |
+
const x = Math.max(0, box.x);
|
| 710 |
+
const y = Math.max(0, box.y);
|
| 711 |
+
const w = Math.min(box.width, els.overlay.width - x);
|
| 712 |
+
const h = Math.min(box.height, els.overlay.height - y);
|
| 713 |
+
const insight = makeInsight(det);
|
| 714 |
+
drawCornerBox(x, y, w, h);
|
| 715 |
+
drawLabel(x, y, w, insight);
|
| 716 |
+
}
|
| 717 |
+
}
|
| 718 |
+
|
| 719 |
+
function fitCanvas() {
|
| 720 |
+
const vw = els.video.videoWidth || 640;
|
| 721 |
+
const vh = els.video.videoHeight || 480;
|
| 722 |
+
if (els.overlay.width !== vw || els.overlay.height !== vh) {
|
| 723 |
+
els.overlay.width = vw;
|
| 724 |
+
els.overlay.height = vh;
|
| 725 |
+
}
|
| 726 |
+
els.stage.style.aspectRatio = `${vw} / ${vh}`;
|
| 727 |
+
if (lastDetections.length) drawDetections(lastDetections);
|
| 728 |
+
}
|
| 729 |
+
|
| 730 |
+
async function loadModels() {
|
| 731 |
+
try {
|
| 732 |
+
const waitForFaceApi = () => new Promise((resolve, reject) => {
|
| 733 |
+
const started = performance.now();
|
| 734 |
+
const tick = () => {
|
| 735 |
+
if (window.faceapi) return resolve();
|
| 736 |
+
if (performance.now() - started > 12000) return reject(new Error("face-api.js did not load"));
|
| 737 |
+
setTimeout(tick, 80);
|
| 738 |
+
};
|
| 739 |
+
tick();
|
| 740 |
+
});
|
| 741 |
+
|
| 742 |
+
await waitForFaceApi();
|
| 743 |
+
await Promise.all([
|
| 744 |
+
faceapi.nets.tinyFaceDetector.loadFromUri(MODEL_URL),
|
| 745 |
+
faceapi.nets.faceLandmark68TinyNet.loadFromUri(MODEL_URL),
|
| 746 |
+
faceapi.nets.faceExpressionNet.loadFromUri(MODEL_URL),
|
| 747 |
+
faceapi.nets.ageGenderNet.loadFromUri(MODEL_URL),
|
| 748 |
+
]);
|
| 749 |
+
modelsReady = true;
|
| 750 |
+
setModelStatus("AI models ready", "ready");
|
| 751 |
+
els.startBtn.disabled = false;
|
| 752 |
+
renderBars({});
|
| 753 |
+
} catch (err) {
|
| 754 |
+
console.error(err);
|
| 755 |
+
setModelStatus("Model loading failed", "error");
|
| 756 |
+
showToast("Model loading failed. Refresh the Space and check that the browser can access the CDN.");
|
| 757 |
+
}
|
| 758 |
+
}
|
| 759 |
+
|
| 760 |
+
function stopStream() {
|
| 761 |
+
if (stream) {
|
| 762 |
+
for (const track of stream.getTracks()) track.stop();
|
| 763 |
+
}
|
| 764 |
+
stream = null;
|
| 765 |
+
running = false;
|
| 766 |
+
detecting = false;
|
| 767 |
+
els.video.srcObject = null;
|
| 768 |
+
ctx.clearRect(0, 0, els.overlay.width, els.overlay.height);
|
| 769 |
+
els.emptyState.style.display = "grid";
|
| 770 |
+
els.startBtn.disabled = !modelsReady;
|
| 771 |
+
els.switchBtn.disabled = true;
|
| 772 |
+
els.stopBtn.disabled = true;
|
| 773 |
+
els.cameraTag.textContent = "Camera: stopped";
|
| 774 |
+
resetDetails();
|
| 775 |
+
}
|
| 776 |
+
|
| 777 |
+
async function startCamera(facing = currentFacing) {
|
| 778 |
+
if (!modelsReady) {
|
| 779 |
+
showToast("Please wait until the AI models finish loading.");
|
| 780 |
+
return;
|
| 781 |
+
}
|
| 782 |
+
|
| 783 |
+
stopStream();
|
| 784 |
+
currentFacing = facing;
|
| 785 |
+
els.cameraTag.textContent = `Camera: ${currentFacing === "user" ? "front" : "rear"} requested`;
|
| 786 |
+
|
| 787 |
+
const constraints = {
|
| 788 |
+
audio: false,
|
| 789 |
+
video: {
|
| 790 |
+
facingMode: { ideal: currentFacing },
|
| 791 |
+
width: { ideal: 960 },
|
| 792 |
+
height: { ideal: 720 },
|
| 793 |
+
}
|
| 794 |
+
};
|
| 795 |
+
|
| 796 |
+
try {
|
| 797 |
+
stream = await navigator.mediaDevices.getUserMedia(constraints);
|
| 798 |
+
} catch (firstErr) {
|
| 799 |
+
console.warn("Preferred camera failed, falling back", firstErr);
|
| 800 |
+
try {
|
| 801 |
+
stream = await navigator.mediaDevices.getUserMedia({ audio: false, video: true });
|
| 802 |
+
} catch (err) {
|
| 803 |
+
console.error(err);
|
| 804 |
+
showToast("Camera permission failed. Allow camera access in your browser settings.");
|
| 805 |
+
els.cameraTag.textContent = "Camera: permission needed";
|
| 806 |
+
return;
|
| 807 |
+
}
|
| 808 |
+
}
|
| 809 |
+
|
| 810 |
+
els.video.srcObject = stream;
|
| 811 |
+
await els.video.play();
|
| 812 |
+
fitCanvas();
|
| 813 |
+
running = true;
|
| 814 |
+
els.emptyState.style.display = "none";
|
| 815 |
+
els.startBtn.disabled = true;
|
| 816 |
+
els.switchBtn.disabled = false;
|
| 817 |
+
els.stopBtn.disabled = false;
|
| 818 |
+
els.cameraTag.textContent = `Camera: ${currentFacing === "user" ? "front" : "rear"}`;
|
| 819 |
+
lastLoopTime = performance.now();
|
| 820 |
+
fpsSmooth = 0;
|
| 821 |
+
detectLoop();
|
| 822 |
+
}
|
| 823 |
+
|
| 824 |
+
async function detectLoop() {
|
| 825 |
+
if (!running || !modelsReady || detecting) return;
|
| 826 |
+
detecting = true;
|
| 827 |
+
const started = performance.now();
|
| 828 |
+
try {
|
| 829 |
+
fitCanvas();
|
| 830 |
+
const cfg = modes[els.modeSelect.value] || modes.balanced;
|
| 831 |
+
const options = new faceapi.TinyFaceDetectorOptions({ inputSize: cfg.inputSize, scoreThreshold: cfg.scoreThreshold });
|
| 832 |
+
const raw = await faceapi
|
| 833 |
+
.detectAllFaces(els.video, options)
|
| 834 |
+
.withFaceLandmarks(true)
|
| 835 |
+
.withFaceExpressions()
|
| 836 |
+
.withAgeAndGender();
|
| 837 |
+
const displaySize = { width: els.overlay.width, height: els.overlay.height };
|
| 838 |
+
const resized = faceapi.resizeResults(raw, displaySize);
|
| 839 |
+
const elapsed = performance.now() - started;
|
| 840 |
+
drawDetections(resized);
|
| 841 |
+
updateDetails(resized, elapsed);
|
| 842 |
+
setTimeout(() => {
|
| 843 |
+
detecting = false;
|
| 844 |
+
requestAnimationFrame(detectLoop);
|
| 845 |
+
}, cfg.interval);
|
| 846 |
+
} catch (err) {
|
| 847 |
+
console.error(err);
|
| 848 |
+
detecting = false;
|
| 849 |
+
showToast("Live analysis hit an error. Restarting camera may fix it.");
|
| 850 |
+
setTimeout(() => requestAnimationFrame(detectLoop), 250);
|
| 851 |
+
}
|
| 852 |
+
}
|
| 853 |
+
|
| 854 |
+
els.startBtn.addEventListener("click", () => startCamera(currentFacing));
|
| 855 |
+
els.switchBtn.addEventListener("click", () => {
|
| 856 |
+
currentFacing = currentFacing === "user" ? "environment" : "user";
|
| 857 |
+
startCamera(currentFacing);
|
| 858 |
+
});
|
| 859 |
+
els.stopBtn.addEventListener("click", stopStream);
|
| 860 |
+
els.video.addEventListener("loadedmetadata", fitCanvas);
|
| 861 |
+
window.addEventListener("resize", fitCanvas);
|
| 862 |
+
|
| 863 |
+
resetDetails();
|
| 864 |
+
renderBars({});
|
| 865 |
+
loadModels();
|
| 866 |
+
</script>
|
| 867 |
+
</body>
|
| 868 |
+
</html>
|