# Visual Evidence — Gemma 4 Multimodal Scene Description Generator

## Test Image: Coffee Beans (Macro Photo)

### Gemma 4 Vision Analysis (via Ollama)

**Model:** gemma4:latest (8B, Q4_K_M)
**Input:** sample_photo.jpg (46KB JPEG)

**Structured Output (JSONL):**
```json
{
  "mood": "dark",
  "colors": ["dark brown", "espresso", "black"],
  "composition": "close-up",
  "camera": "static",
  "lighting": "soft",
  "description": "An extreme close-up shot captures a dense pile of roasted coffee beans. The beans are a uniform, deep dark brown and appear slightly oily, filling the entire frame. The focus emphasizes the rich texture and individual shapes of the beans."
}
```

### Hermes Vision Analysis (Cross-Validation)

**Scene ID:** COFFEE_MACRO_001
**Mood:** Warm, aromatic, and comforting
**Dominant Colors:** Deep umber, burnt sienna, espresso black, mahogany
**Composition:** Full-frame fill, centrally weighted
**Camera:** High-angle, close-up (Macro)
**Lighting:** Soft, diffused top-lighting

## Test Image: Abstract Geometric Composition

### Gemma 4 Vision Analysis

**Input:** scene1.jpg (10KB, PIL-generated)

**Structured Output (JSONL):**
```json
{
  "mood": "energetic",
  "colors": ["deep blue", "yellow", "coral"],
  "composition": "wide-shot",
  "camera": "static",
  "lighting": "artificial",
  "description": "This is an abstract graphic composition set against a solid, deep blue background. A bright yellow square is placed in the upper left quadrant, while a large, solid coral-colored circle occupies the lower right quadrant. The geometric shapes create a high-contrast, minimalist visual balance."
}
```

## Verification Summary

| Test | Status | Details |
|------|--------|---------|
| Model detection | ✅ PASS | `gemma4:latest` auto-detected |
| Image scanning | ✅ PASS | 2 images found recursively |
| Vision analysis | ✅ PASS | Both images described accurately |
| JSON parsing | ✅ PASS | Structured output with all fields |
| Training format | ✅ PASS | JSONL with source, model, timestamp |
| ShareGPT format | ⚠️ PARTIAL | Works but needs retry on rate limit |

## Running the Generator

```bash
# Check model availability
python scripts/generate_scene_descriptions.py --check-model

# Generate scene descriptions from assets
python scripts/generate_scene_descriptions.py --input ./assets --output training-data/scene-descriptions-auto.jsonl

# Limit to 10 files with specific model
python scripts/generate_scene_descriptions.py --input ./assets --model gemma4:latest --limit 10

# ShareGPT format for training pipeline
python scripts/generate_scene_descriptions.py --input ./assets --format sharegpt
```