# 📐  L2 Spec — PillCam-SPECTRA Optical-Property Recovery (analytical core) — Spec Skeleton

**ID:** `L2-511-001` · **Status:** ⊙ Testnet (genesis catalog)
**Parents:** ⬆ Principle [`L1-511`](/artifact/l1/L1-511)

> **🎯 Tolerance (ε):** expression
> **⚖ Difficulty score:** 0.5 · **Delta tier:** 5
> **⛓ On-chain block:** 41553362

---

## 1. Domain Ω

**Type:** `range`

| Parameter | Unit | Range |
|---|---|---|
| H | px | 128 – 1024 |
| W | px | 128 – 1024 |
| Snr db | dB | 10.0 – 38.0 |
| Motion blur | — | 0.0 – 0.3 |
| N wavelengths | — | 3 – 16 |
| Lambda range nm | nm | [NEEDS_HAND_AUTHORING: bounds] |
| Mucosal curvature | — | 0.0 – 0.3 |
| Working distance mm | mm | 0.5 – 5.0 |
| Illumination uniformity | — | 0.0 – 0.4 |
| Scattering anisotropy g | g | 0.7 – 0.95 |
| Capsule orientation drift | — | 0.0 – 0.4 |
| Capsule to mucosa distance | — | 0.0 – 0.4 |
| Source detector distance mm | mm | 3.0 – 12.0 |

## 2. Tolerance (ε)

**Type:** `fn`

```
28.0
```

## 3. Difficulty

| Property | Value |
|---|---|
| Difficulty score | 0.5 |
| Delta tier | 5 |

## 4. Fingerprint

`ad15ab878264185bccb071495488412f2b3503436e8614d40823ae6e17eaee22`

## 5. On-chain Registration

- **Chain hash:** `0xaab1bd6bd6feb8b2266ecfeed2b045c25988f7eb9fd14780ec065bcd47bb0d1e`
- **Chain tx hash:** `0x994f79574b886e33e4163f703d89bb8d8dc36c9558b985253ddff0e1bc6eb1eb`
- **Chain block:** `41553362`

---

## File Mapping

This bundle consists of: `L2-511-001.md`, `L2-511-001.json`.

| File | Role | How to regenerate |
|------|------|-------------------|
| `L2-511-001.md` | Source of truth — edit this | Human or LLM |
| `L2-511-001.json` | Structured metadata for the registry | LLM regenerates from the sections above |

**Prompt for your LLM after editing this Markdown:**

> Read the attached Markdown. Regenerate the sibling `.json` so every field matches.
> Preserve the schema documented in the rows above.
> Output each file in its own fenced code block tagged with the filename.
> Output only the JSON object.

_This Markdown was auto-synthesized from the catalog row for `L2-511-001`._
_Edit it, regenerate the JSON, and submit at [/submit](/submit) to claim the artifact._