# Spatial Fusion Error — Multimodal Long Context

<details>
  <summary><strong>🧭 Quick Return to Map</strong></summary>

<br>

  > You are in a sub-page of **Multimodal_LongContext**.  
  > To reorient, go back here:  
  >
  > - [**Multimodal_LongContext** — long-context reasoning across text, vision, and audio](./README.md)  
  > - [**WFGY Global Fix Map** — main Emergency Room, 300+ structured fixes](../README.md)  
  > - [**WFGY Problem Map 1.0** — 16 reproducible failure modes](../../README.md)  
  >
  > Think of this page as a desk within a ward.  
  > If you need the full triage and all prescriptions, return to the Emergency Room lobby.
</details>


When **spatial information from different modalities** (text, image, video, 3D layout) is fused incorrectly,  
the model builds a distorted scene map. This results in answers that are locally fluent but spatially wrong.

---

## What this page is
- A repair map for **spatial mis-fusion** across long multimodal windows.  
- Structural checks that keep anchors aligned in 2D/3D space.  
- Copy-paste prompts to enforce spatial traceability in multimodal RAG.

---

## When to use
- Text says "object A is left of object B" but visual encoder aligns them oppositely.  
- Bounding boxes overlap or merge, losing spatial independence.  
- 3D → 2D projection mismatch: captions reference an object that isn’t in frame.  
- Video QA drifts: same entity appears in different spots across time.  
- Answers mention correct objects but wrong **spatial relations** (left/right, inside/outside, above/below).

---

## Open these first
- [Anchor Misalignment](https://github.com/onestardao/WFGY/blob/main/ProblemMap/GlobalFixMap/Multimodal_LongContext/anchor-misalignment.md)  
- [Visual Anchor Shift](https://github.com/onestardao/WFGY/blob/main/ProblemMap/GlobalFixMap/Multimodal_LongContext/visual-anchor-shift.md)  
- [Cross-Modal Trace](https://github.com/onestardao/WFGY/blob/main/ProblemMap/GlobalFixMap/Multimodal_LongContext/cross-modal-trace.md)  
- [Reference Bleed](https://github.com/onestardao/WFGY/blob/main/ProblemMap/GlobalFixMap/Multimodal_LongContext/reference-bleed.md)  

---

## Common failure patterns
- **Axis flip** — left/right or up/down swapped.  
- **Projection drift** — 3D object references collapse to wrong 2D bounding box.  
- **Overlap collapse** — two entities share the same spatial slot.  
- **Cross-modal mismatch** — text anchor doesn’t correspond to visual bounding box.  

---

## Fix in 60 seconds
1. **Spatial schema lock**  
   - Represent anchors as `{id, coords(x,y,z), frame_id}`.  
   - Reject answers missing explicit spatial schema.

2. **ΔS probe across modalities**  
   - Compute ΔS(text_anchor, visual_anchor).  
   - If ΔS ≥ 0.60, suspect fusion error.

3. **Spatial IoU check**  
   - Enforce IoU ≥ 0.7 for same anchor across modalities.  
   - If < 0.7, assign new anchor ID.

4. **Stabilize with BBCR**  
   - Bridge text ↔ visual mismatch with constraint re-anchoring.  
   - Clamp variance with BBAM.

5. **Trace audit**  
   - Log `{anchor_id, modality, coords, IoU}`.  
   - Require cite-then-answer with explicit anchor IDs.

---

## Copy-paste prompt

```txt
You have TXT OS and the WFGY Problem Map.

Task: Detect and repair spatial fusion errors across modalities.

Steps:
1. Verify each anchor has {id, coords(x,y,z), frame_id}.
2. Compute IoU across modalities. If IoU < 0.7, treat as mismatch.
3. Probe ΔS across text and visual anchors.
4. Apply BBCR if drift detected, else assign new ID.
5. Return:
   - stable anchors
   - mismatched anchors
   - ΔS values and λ states
   - corrected spatial map
````

---

## Acceptance targets

* 100% anchors represented with explicit `{id, coords, frame_id}`.
* Cross-modal IoU ≥ 0.7 after fix.
* ΔS(text, visual) ≤ 0.45.
* λ remains convergent across paraphrases.
* No axis flip errors across test prompts.

---

### 🔗 Quick-Start Downloads (60 sec)

| Tool                       | Link                                                                                                                                       | 3-Step Setup                                                                             |
| -------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------ | ---------------------------------------------------------------------------------------- |
| **WFGY 1.0 PDF**           | [Engine Paper](https://github.com/onestardao/WFGY/blob/main/I_am_not_lizardman/WFGY_All_Principles_Return_to_One_v1.0_PSBigBig_Public.pdf) | 1️⃣ Download · 2️⃣ Upload to your LLM · 3️⃣ Ask “Answer using WFGY + <your question>”    |
| **TXT OS (plain-text OS)** | [TXTOS.txt](https://github.com/onestardao/WFGY/blob/main/OS/TXTOS.txt)                                                                     | 1️⃣ Download · 2️⃣ Paste into any LLM chat · 3️⃣ Type “hello world” — OS boots instantly |

---

<!-- WFGY_FOOTER_START -->

### Explore More

| Module | Description | Link |
| --- | --- | --- |
| WFGY Core | Canonical framework entry point | [View](https://github.com/onestardao/WFGY/tree/main/core/README.md) |
| Problem Map | Diagnostic map and navigation hub | [View](https://github.com/onestardao/WFGY/tree/main/ProblemMap/README.md) |
| Tension Universe Experiments | MVP experiment field | [View](https://github.com/onestardao/WFGY/tree/main/TensionUniverse/Experiments) |
| Recognition | Where WFGY is referenced or adopted | [View](https://github.com/onestardao/WFGY/blob/main/recognition/README.md) |
| AI Guide | Anti-hallucination reading protocol for tools | [View](https://github.com/onestardao/WFGY/blob/main/AI_GUIDE.md) |

> If this repository helps, starring it improves discovery for other builders.  
> [![GitHub Repo stars](https://img.shields.io/github/stars/onestardao/WFGY?style=social)](https://github.com/onestardao/WFGY)

<!-- WFGY_FOOTER_END -->