ZPE-Image v0.1.0

ZPE-Image v0.1.0

Standalone bounded image encoder for sparse-stroke figures. Two routes ship: a primary sparse-stroke route and a narrower hole-bearing bundle route for exactly three hole-bearing forms. Both are CI-falsified.

Strongest intrinsic result (CI-anchored, no external baseline): 5.75× byte reduction on the five accepted sparse figures versus the internal quadtree-enhanced fallback, with 100% accept and reject rates and perturbation floors clearing documented thresholds.

What this release proves

• Primary sparse route accepts 5/5 bounded sparse figures and rejects all 7 mixed/natural-image negatives.
• Perturbation floors (dilate, salt-pepper, shift): worst-case IoU 0.632 (≥0.62), worst-case skeleton F1 0.741 (≥0.74).
• 5.75× byte reduction (1,362 vs 7,839 bytes, quadtree fallback baseline), within bounded scope.
• Hole-bearing bundle route: 3/3 accepts, projection IoU = 1.0 and skeleton F1 = 1.0 under all perturbations.

What this release does not claim

• No photo, texture, gradient, or broad natural-image coverage.
• No external codec comparison (JPEG/WebP/AVIF/JPEG-XL) — baselines are internal only.

License

Zer0pa Source-Available License v7.1 (LicenseRef-Zer0pa-SAL-7.1). See LICENSE for full terms.