libretech
028f5f0fb8
- 18 demos aus refactor/didaktik-rewrite-2026 cherry-picked (aliasing-paar, byte-fuer-byte, container-vs-codec, drei-dateien, jpeg-pipeline, kap02-05-eroeffner, kb-vs-kib, nyquist-diagram, pivot-signal-zu-byte, psychoakustik/psychovisualitaet-grafik, raster-vs-vektor, summary-kap02, summary-organizer, usb-c-drei-achsen) - barn-rgb.png + barn-cmyk.png neu generiert (analog zu ybcbr.webp, kanaltrennung mit korrekter k-extraktion) - lv-original-vs-fake.jpg + 02-bild-audio-video.md slides wired up
223 lines
7.4 KiB
HTML
223 lines
7.4 KiB
HTML
<!DOCTYPE html>
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<html lang="de">
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<head>
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<meta charset="UTF-8">
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<title>Psychovisualität — Luminanz vor Chrominanz</title>
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<style>
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:root {
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--dark: #1a1a2e;
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--muted: #6b7280;
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--soft: #f8fafc;
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--border: #cbd5e1;
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--hl: #d63384;
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--full: #2563eb;
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--reduced: #7c3aed;
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--y: #1a1a2e;
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--cb: #2563eb;
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--cr: #ef4444;
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--bar-bg: #e2e8f0;
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}
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html, body { margin: 0; padding: 0; background: #fff; font-family: system-ui, -apple-system, sans-serif; color: var(--dark); }
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body { padding: 30px 40px; }
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h1 { text-align: center; margin: 0 0 6px; font-size: 1.75rem; }
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.sub { text-align: center; color: var(--muted); margin-bottom: 24px; font-size: 1.05rem; }
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.sub strong { color: var(--dark); }
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.compare {
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display: grid;
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grid-template-columns: 1fr 1fr;
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gap: 22px;
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max-width: 1180px;
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margin: 0 auto;
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}
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.col {
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border: 2px solid;
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border-radius: 12px;
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padding: 16px 20px;
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background: #fff;
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display: flex;
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flex-direction: column;
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gap: 12px;
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}
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.col.full { border-color: var(--full); }
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.col.reduced { border-color: var(--reduced); }
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.col-head { display: flex; justify-content: space-between; align-items: baseline; }
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.col-tag {
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font-size: 0.72rem;
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font-weight: 700;
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text-transform: uppercase;
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letter-spacing: 0.12em;
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color: var(--muted);
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}
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.col-name { font-size: 1.25rem; font-weight: 700; }
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.col.full .col-name { color: var(--full); }
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.col.reduced .col-name { color: var(--reduced); }
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.col-format {
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font-family: ui-monospace, monospace;
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font-size: 0.82rem;
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color: var(--muted);
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}
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.preview {
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border-radius: 8px;
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overflow: hidden;
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border: 1px solid var(--border);
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}
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.preview svg { display: block; }
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.channels {
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display: flex;
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flex-direction: column;
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gap: 6px;
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}
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.channel { display: grid; grid-template-columns: 90px 1fr 60px; gap: 8px; align-items: center; font-size: 0.85rem; }
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.channel-label {
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font-family: ui-monospace, monospace;
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font-weight: 700;
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}
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.channel-bar { height: 14px; background: var(--bar-bg); border-radius: 3px; overflow: hidden; }
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.channel-bar .fill { height: 100%; border-radius: 3px; }
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.channel-bar .fill.y { background: var(--y); }
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.channel-bar .fill.cb { background: var(--cb); }
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.channel-bar .fill.cr { background: var(--cr); }
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.channel-pct {
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font-family: ui-monospace, monospace;
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font-size: 0.78rem;
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color: var(--muted);
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text-align: right;
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}
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.summary-line {
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display: flex;
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justify-content: space-between;
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background: var(--soft);
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border-radius: 6px;
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padding: 6px 12px;
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font-family: ui-monospace, monospace;
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font-size: 0.85rem;
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color: var(--dark);
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}
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.summary-line strong { color: var(--hl); }
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.verdict {
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margin-top: 22px;
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max-width: 1180px;
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margin-left: auto;
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margin-right: auto;
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text-align: center;
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border: 2px solid var(--hl);
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border-radius: 12px;
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padding: 14px 22px;
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}
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.verdict-q { font-size: 1.1rem; font-weight: 700; color: var(--hl); }
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.verdict-a { font-size: 0.93rem; color: var(--dark); margin-top: 4px; }
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.verdict-a strong { color: var(--hl); }
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</style>
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</head>
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<body>
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<h1>Psychovisualität — Luminanz vor Chrominanz</h1>
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<div class="sub">Das Auge sieht <strong>Helligkeit</strong> scharf. <strong>Farbe</strong> darf grob bleiben — und das Bild sieht trotzdem identisch aus.</div>
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<div class="compare">
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<div class="col full">
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<div class="col-head">
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<span class="col-name">Ohne Subsampling</span>
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<span class="col-tag">4:4:4</span>
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</div>
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<div class="col-format">jedes Pixel speichert Y · Cb · Cr in voller Auflösung</div>
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<svg class="preview" viewBox="0 0 320 130" preserveAspectRatio="xMidYMid slice">
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<defs>
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<linearGradient id="full-sky" x1="0" y1="0" x2="0" y2="1">
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<stop offset="0%" stop-color="#fde68a"/>
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<stop offset="55%" stop-color="#fb923c"/>
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<stop offset="100%" stop-color="#7c3aed"/>
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</linearGradient>
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</defs>
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<rect x="0" y="0" width="320" height="130" fill="url(#full-sky)"/>
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<circle cx="230" cy="50" r="22" fill="#fef3c7"/>
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<path d="M0,90 L40,75 L90,87 L140,68 L190,82 L240,66 L290,80 L320,72 L320,130 L0,130 Z" fill="#1e1b4b"/>
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<path d="M0,108 L60,100 L120,108 L180,98 L240,106 L300,98 L320,103 L320,130 L0,130 Z" fill="#0f172a" opacity="0.7"/>
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</svg>
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<div class="channels">
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<div class="channel">
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<span class="channel-label">Y</span>
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<div class="channel-bar"><div class="fill y" style="width:100%"></div></div>
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<span class="channel-pct">100 %</span>
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</div>
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<div class="channel">
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<span class="channel-label">Cb</span>
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<div class="channel-bar"><div class="fill cb" style="width:100%"></div></div>
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<span class="channel-pct">100 %</span>
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</div>
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<div class="channel">
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<span class="channel-label">Cr</span>
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<div class="channel-bar"><div class="fill cr" style="width:100%"></div></div>
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<span class="channel-pct">100 %</span>
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</div>
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</div>
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<div class="summary-line">
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<span>Datenmenge:</span>
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<span><strong>100 %</strong></span>
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</div>
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</div>
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<div class="col reduced">
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<div class="col-head">
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<span class="col-name">JPEG · H.264 Standard</span>
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<span class="col-tag">4:2:0</span>
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</div>
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<div class="col-format">Y voll · Cb & Cr nur in 2×2-Pixel-Blöcken</div>
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<svg class="preview" viewBox="0 0 320 130" preserveAspectRatio="xMidYMid slice">
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<defs>
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<linearGradient id="red-sky" x1="0" y1="0" x2="0" y2="1">
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<stop offset="0%" stop-color="#fde68a"/>
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<stop offset="55%" stop-color="#fb923c"/>
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<stop offset="100%" stop-color="#7c3aed"/>
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</linearGradient>
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</defs>
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<rect x="0" y="0" width="320" height="130" fill="url(#red-sky)"/>
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<circle cx="230" cy="50" r="22" fill="#fef3c7"/>
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<path d="M0,90 L40,75 L90,87 L140,68 L190,82 L240,66 L290,80 L320,72 L320,130 L0,130 Z" fill="#1e1b4b"/>
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<path d="M0,108 L60,100 L120,108 L180,98 L240,106 L300,98 L320,103 L320,130 L0,130 Z" fill="#0f172a" opacity="0.7"/>
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</svg>
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<div class="channels">
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<div class="channel">
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<span class="channel-label">Y</span>
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<div class="channel-bar"><div class="fill y" style="width:100%"></div></div>
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<span class="channel-pct">100 %</span>
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</div>
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<div class="channel">
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<span class="channel-label">Cb</span>
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<div class="channel-bar"><div class="fill cb" style="width:25%"></div></div>
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<span class="channel-pct">25 %</span>
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</div>
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<div class="channel">
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<span class="channel-label">Cr</span>
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<div class="channel-bar"><div class="fill cr" style="width:25%"></div></div>
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<span class="channel-pct">25 %</span>
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</div>
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</div>
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<div class="summary-line">
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<span>Datenmenge:</span>
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<span><strong>50 %</strong></span>
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</div>
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</div>
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</div>
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<div class="verdict">
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<div class="verdict-q">Halbe Datenmenge. Identisches Bild — für dein Auge.</div>
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<div class="verdict-a">JPEG, H.264, H.265, WebP — alle reduzieren die Farb-Auflösung auf <strong>ein Viertel</strong>. Das ist Psychovisualität: was wir nicht scharf sehen, muss man nicht scharf speichern.</div>
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</div>
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</body>
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</html>
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