Pith Number

pith:RYK24JQP

pith:2026:RYK24JQPPEHDWU3T2WNWXXR6SE

not attested not anchored not stored refs pending

VeraRetouch: A Lightweight Fully Differentiable Framework for Multi-Task Reasoning Photo Retouching

Changqing Zou, Hongliang Wang, Jiajun Tang, Jinwei Chen, Qingnan Fan, Yihong Guo, Yizhuo Zhou, Youwei Lyu

VeraRetouch replaces non-differentiable external tools with a custom renderer to allow end-to-end training of reasoning photo retouching.

arxiv:2604.27375 v2 · 2026-04-30 · cs.CV

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\usepackage{pith}
\pithnumber{RYK24JQPPEHDWU3T2WNWXXR6SE}

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Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Claims

C1strongest claim

VeraRetouch achieves state-of-the-art performance across multiple benchmarks while maintaining a significantly smaller footprint, enabling mobile deployment.

C2weakest assumption

The fully differentiable Retouch Renderer can faithfully replicate the effects of professional retouching operations using only decoupled control latents for lighting, global color, and specific colors, without introducing artifacts or losing fidelity compared to external tools.

C3one line summary

VeraRetouch is a lightweight fully differentiable framework using a 0.5B VLM for retouching plans and a custom renderer for end-to-end training, backed by a new million-scale dataset and RL post-training, to achieve SOTA multi-task photo retouching with mobile deployment.

Receipt and verification

First computed	2026-05-21T01:05:19.666166Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8e15ae260f790e3b5373d59b6bde3e9130b41c92eb29a8a2acf5dbdc0c9949cb

Aliases

arxiv: 2604.27375 · arxiv_version: 2604.27375v2 · doi: 10.48550/arxiv.2604.27375 · pith_short_12: RYK24JQPPEHD · pith_short_16: RYK24JQPPEHDWU3T · pith_short_8: RYK24JQP

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/RYK24JQPPEHDWU3T2WNWXXR6SE \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 8e15ae260f790e3b5373d59b6bde3e9130b41c92eb29a8a2acf5dbdc0c9949cb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "48d3fba522524a7d5308db1ccacddc9f40322e8a951e3d20a9e35a9e5dd23365",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by-nc-sa/4.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2026-04-30T03:39:32Z",
    "title_canon_sha256": "1351a39195934f95660a3e1b03ef58c391c15fcdbca2b6f19b4e841f675186ec"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2604.27375",
    "kind": "arxiv",
    "version": 2
  }
}