L1 ⚛ L1-078 ⊙ Testnet

Event Camera (DVS) — intensity reconstruction from asynchronous events

Computational Photography · Asynchronous neuromorphic imaging

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⬇ L1-078.md

# ⚛ L1 Principle — Event Camera (DVS) — intensity reconstruction from asynchronous events **ID:** `L1-078` · **Status:** ⊙ Testnet (genesis catalog) > **🌐 Domain:** Computational Photography — *Asynchronous neuromorphic imaging* > **🎯 Problem class:** nonlinear inverse · **🧮 Solution space:** 2D plus time video > **📡 Carrier:** photon · **🌫 Noise:** asynchronous event > **⚖ Difficulty (δ):** 5 · **⛓ Block:** 41554171 --- ## 🧠 1. Introduction **Event Camera (DVS) — intensity reconstruction from asynchronous events** is a **nonlinear inverse problem** whose unknown lives in **2D plus time video** space, within the **Asynchronous neuromorphic imaging** sub-domain of **Computational Photography**. Measurements consist of photons collected by an optical detector via a **asynchronous log intensity change** sensing mechanism. The forward operator applies, in order: L · log intensity operator; D · threshold · delta operator; S · stream · asynchronous operator. Observations are corrupted by asynchronous event. Intensity reconstruction is ill-posed (DC level is unobservable; only log-differentials are sampled). Unique reconstruction requires an anchor frame (DAVIS hybrid output) or a strong prior (video smoothness, learned models). Contrast-threshold variance sigma_C and noise events add strong instability at low event rates. ## ⚙ 2. Forward Model Physical chain: **x** → L · log intensity → D · threshold · delta → S · stream · asynchronous → **y** (detector). ``` y = `S.stream.asynchronous` `D.threshold.delta` `L.log_intensity` x ``` **Measurement DAG:** | Primitive | What it does | |---|---| | `L.log_intensity` | L · log intensity operator | | `D.threshold.delta` | D · threshold · delta operator | | `S.stream.asynchronous` | S · stream · asynchronous operator | ## 🔬 3. Physics Fingerprint | Property | Value | |---|---| | Domain | Computational Photography | | Sub domain | Asynchronous neuromorphic imaging | | Carrier | photon | | Problem class | nonlinear_inverse | | Solution space | 2D_plus_time_video | | Noise model | asynchronous_event | | Integration axis | temporal | | Difficulty delta | 5 | | L dag | 2.8 | ## 📡 4. Measurement Model Intensity reconstruction is ill-posed (DC level is unobservable; only log-differentials are sampled). Unique reconstruction requires an anchor frame (DAVIS hybrid output) or a strong prior (video smoothness, learned models). Contrast-threshold variance sigma_C and noise events add strong instability at low event rates. | Metric | Value | |---|---| | Metric | PSNR_dB | | Secondary | SSIM | ## 📏 5. Operating Range (Ω) **Center problem class:** `event_to_intensity_reconstruction` · **Forward operator:** `dvs_log_intensity_threshold` **Center point:** | Parameter | Unit | Value | |---|---|---| | H | px | 640 | | W | px | 480 | | N events per sec | — | 1000000 | | Noise event rate | — | 0 | | Contrast threshold c | — | 0.2 | | Reconstruction rate hz | Hz | 60 | | Contrast threshold variance | — | 0 | **Allowed bounds:** | Parameter | Unit | Range | |---|---|---| | H | px | 240 – 1280 | | W | px | 180 – 960 | | Hot pixels | — | 0 – 100 | | N events per sec | — | 10000 – 100000000 | | Noise event rate | — | 0.0 – 100000 | | Contrast threshold c | — | 0.05 – 0.5 | | Reconstruction rate hz | Hz | 15 – 240 | | Refractory period drift | — | 0.0 – 1000 | | Contrast threshold variance | — | 0.0 – 0.1 | ## 🎯 6. Tolerance (ε) **Center tolerance:** 22.0 dB PSNR | Metric | Range | |---|---| | Psnr db | 12.0 – 32.0 | ## ⚖ 7. Hardness Function Hardness scales as **`epsilon_fn`** on **PSNR_dB**, with κ = `4000` and δ = `5`. ## 💾 8. Reference Dataset - **primary** · weight 1.0 · IPFS _(not pinned yet)_ ## 9. On-chain Registration - **Chain hash:** `0xa72e0d5ef4f3d0bd8dc596c336dff5a8be897f9205125c6c047f183679216e39` - **Chain tx hash:** `0xbbdefcb2d434660bc269d96a614c31e6c00cb029ca09aaee6f9722bcd4019d72` - **Chain block:** `41554171` --- ## File Mapping This bundle consists of: `L1-078.md`, `L1-078.json`. | File | Role | How to regenerate | |------|------|-------------------| | `L1-078.md` | Source of truth — edit this | Human or LLM | | `L1-078.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 `L1-078`._ _Edit it, regenerate the JSON, and submit at [/submit](/submit) to claim the artifact._

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Read the attached Markdown (L1-078.md).
Regenerate L1-078.json so every field matches the Markdown.
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L2-078-001 Event Camera Intensity Reconstruction Mismatch-Only Spec

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📋 JSON metadata

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    "sensing_mechanism": "asynchronous_log_intensity_change",
    "solution_space": "2D_plus_time_video",
    "sub_domain": "Asynchronous neuromorphic imaging",
    "title": "Event Camera (DVS) \u2014 intensity reconstruction from asynchronous events"
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  },
  "staked_pwm": 0.0,
  "status": "testnet",
  "sub_domain": "Asynchronous neuromorphic imaging",
  "title": "Event Camera (DVS) \u2014 intensity reconstruction from asynchronous events"
}

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