147 lines
7.1 KiB
Markdown
147 lines
7.1 KiB
Markdown
# Reference Breakdown: Paris Eiffel Tower - Seine Golden Hour
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## Source
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- **File**: `52395375673_9981be45d2_o.jpg`
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- **Camera**: Sony ILCE-7M3 (A7 III)
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- **Lens**: Sony FE 24-105mm F4 G OSS @ 24mm, f/5.0
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- **Exposure**: 1/80s, ISO 100, Auto WB
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- **Date**: 2022-06-25 20:17:49 (golden hour, ~90min before sunset)
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- **Software**: Capture One 12.1.5
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- **Location**: South bank of Seine, Quai de Branly area
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- **Coordinates**: ~48.8577 N, 2.3011 E (estimated from geometry, no GPS in EXIF)
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- **Altitude**: ~33m above sea level (riverside path)
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---
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## 1. Scene Characterisation (General)
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| Property | Value | Evidence |
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|----------|-------|----------|
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| **Environment** | Outdoor | Open sky, natural light |
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| **Domain** | Water + Sky + Earth | Seine river, sky, urban ground |
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| **Location** | Paris, France | Eiffel Tower, Seine, Haussmann buildings |
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| **Setting** | Urban + City Park + River | Champ de Mars trees, quay, Seine |
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| **Time of Day** | Golden hour (pre-sunset) | EXIF 20:17, sun from west lighting tower orange, long shadows |
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| **Time Evidence** | Likely evening not morning | EXIF timestamp 20:17. Also: no people visible on quay (evening quiet), closed cafe umbrellas, boats moored for evening. Paris sunrise in June is ~05:45 - 20:17 is definitely evening |
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| **Season** | Summer (late June) | Full leaf trees, long daylight hours, EXIF date 2022-06-25 |
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| **Weather** | Clear with high cloud | Mostly blue sky, thin stratus, some cumulus in distance |
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| **Mood** | Serene, warm, golden | Warm light on iron, calm water, peaceful composition |
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---
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## 2. Segmentation Analysis (Component Meshes)
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### HERO ELEMENTS
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| # | Element | Position | Notes |
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|---|---------|----------|-------|
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| 1 | **Eiffel Tower** | Center frame, full height | Lit golden by low sun from west. Iron lattice structure. Antenna/spike at top. Three visible levels (base arches, 1st floor, 2nd floor, top). Warm orange-gold colour |
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### SKY
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| # | Element | Position | Notes |
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|---|---------|----------|-------|
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| 2 | **Stratus clouds** | Upper sky, thin layers | High altitude, wispy, catches golden light on undersides |
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| 3 | **Cumulus clouds** | Distance, right side | Thicker, some pink/blue tones |
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| 4 | **Aircraft contrail** | Upper right sky | Single white line, diagonal across blue sky |
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| 5 | **Blue sky gradient** | Overall | Deeper blue at zenith, warmer near horizon |
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### WATER
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| # | Element | Position | Notes |
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|---|---------|----------|-------|
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| 6 | **Seine river** | Foreground, full width | Running left to right. Light chop/ripple, reflects sky blue with some golden highlights. Darker on left, lighter toward center |
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### BRIDGES & INFRASTRUCTURE
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| # | Element | Position | Notes |
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|---|---------|----------|-------|
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| 7 | **Bridge (Pont de Bir-Hakeim)** | Left edge of frame | Stone arch bridge, 3-4 arches visible. Road level + metro level above |
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| 8 | **Elevated road/bridge** | Right side | Pont d'Iena area, modern road structure above quay |
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### BOATS & VESSELS
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| # | Element | Position | Notes |
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|---|---------|----------|-------|
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| 9 | **Large tour boat (white)** | Center-left, moored at quay | White hull, multi-deck, passenger vessel |
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| 10 | **Second tour boat** | Behind first boat | Partially visible |
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| 11 | **Dark barge/vessel** | Right side, moored | Darker hull, lower profile |
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| 12 | **Small boat/canoe** | On river, left of center | Small craft on water |
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| 13 | **Boat string lights** | On moored boats | Multiple lights along boat decks/masts, some on (warm yellow), some off |
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### QUAY & WATERFRONT
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| # | Element | Position | Notes |
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|---|---------|----------|-------|
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| 14 | **Stone quay/embankment** | Center, along waterline | Parisian stone quay, mooring bollards |
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| 15 | **Quay roadway** | Behind quay wall | Paved road along riverfront |
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| 16 | **Quay railing/wall** | Along quay edge | Stone or metal barrier |
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### VEGETATION
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| # | Element | Position | Notes |
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|---|---------|----------|-------|
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| 17 | **Tree line (Champ de Mars)** | Behind quay, center | Dense row of mature deciduous trees, full summer leaf, green. ~15-20 trees visible |
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| 18 | **Additional trees** | Left side near bridge | Smaller group of trees |
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### BUILDINGS
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| # | Element | Position | Notes |
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|---|---------|----------|-------|
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| 19 | **Haussmann buildings** | Behind tree line, right side | Classic Parisian 5-6 story buildings, cream/beige stone, mansard roofs |
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| 20 | **Additional buildings** | Left of tower, behind trees | Lower visibility through foliage |
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### STREET FURNITURE & URBAN ELEMENTS
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| # | Element | Position | Notes |
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|---|---------|----------|-------|
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| 21 | **Street lamps** | Along quay | Classic Parisian lamp posts |
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| 22 | **Cars/vehicles** | On quay road (small) | A few vehicles parked or driving along embankment |
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| 23 | **Cafe (closed)** | Quay area | Closed for evening |
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| 24 | **Umbrellas (closed/furled)** | Near cafe | Folded parasols |
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| 25 | **Signs** | Various along quay | Directional/informational signs |
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| 26 | **Columns/bollards** | Along quay | Stone or metal posts |
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### FAIRGROUND
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| # | Element | Position | Notes |
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|---|---------|----------|-------|
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| 27 | **Fairground/carousel** | Near base of tower area | Merry-go-round visible near Champ de Mars edge |
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---
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## 3. Lighting Analysis
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| Property | Value |
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|----------|-------|
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| **Sun direction** | From west (left side of frame) |
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| **Sun height** | ~15-20 degrees above horizon (golden hour) |
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| **Key light** | Warm golden on tower and buildings |
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| **Fill light** | Cool blue ambient from sky |
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| **Color temperature** | ~3000-3500K direct sun, ~7000K sky fill |
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| **Shadows** | Long, stretching right. Tower shadow on trees/buildings |
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| **Contrast** | Moderate - warm highlights, cool shadows |
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| **Sky gradient** | Warm yellow-green at horizon → blue at zenith |
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## 4. Camera Analysis
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| Property | Value | Source |
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|----------|-------|--------|
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| **Focal length** | 24mm (full frame equivalent) | EXIF |
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| **Aperture** | f/5.0 | EXIF |
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| **Height** | ~170cm (standing, riverside path) | Estimated from perspective |
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| **Viewpoint** | South bank, looking NNW toward tower | Geometry analysis |
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| **Distance to tower** | ~800-1000m | Estimated |
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| **Pitch** | ~+5 degrees (slightly looking up at tower) | Composition |
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## 5. What the AI Should Detect
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This is the human ground truth for testing AI perception. The AI should identify ALL elements above. Key challenges:
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- **Fine detail**: String lights on boats (some on, some off)
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- **Occluded elements**: Buildings behind trees
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- **Small elements**: Cars, signs, bollards at this distance
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- **Atmospheric**: Contrail, cloud types (stratus vs cumulus)
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- **Context clues**: Closed cafe, furled umbrellas → time of day evidence
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- **Absence**: No visible pedestrians → supports evening timing
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- **Lighting interpretation**: Golden light = west-facing sun = evening golden hour
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### Scoring: Element Detection
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Total distinct elements: ~27 categories
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| Tier | Elements | Score Weight |
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|------|----------|-------------|
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| Must detect | Eiffel Tower, Seine, sky, bridge, boats, trees, buildings | 50% |
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| Should detect | Cloud types, quay, street lamps, fairground, vehicles | 30% |
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| Bonus detail | String lights, contrail, closed cafe, umbrellas, signs, canoe | 20% |
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