Generates synthetic tasks where multiple rectangles with different aspect ratios are displayed. The goal is to identify and circle the rectangle whose aspect ratio is closest to 2:1 (where the longer side is about twice the shorter side).
Each sample pairs a task (first frame + prompt describing what needs to happen) with its ground truth solution (final frame showing the result + video demonstrating how to achieve it). This structure enables both model evaluation and training.
| Property | Value |
|---|---|
| Task ID | G-195 |
| Task | Select Nearest 2:1 Rectangle |
| Category | Perception |
| Resolution | 1024×1024 px |
| FPS | 16 fps |
| Duration | ~5.6 seconds |
| Output | PNG images + MP4 video |
# Clone the repository
git clone https://github.com/Jiaqi-Gong/Gong_VBVR_Data.git
cd Gong_VBVR_Data/G-195_select_nearest_2_1_rectangle_data-generator
# Install dependencies
pip install -r requirements.txt# Generate 100 samples
python examples/generate.py --num-samples 100
# Generate with specific seed
python examples/generate.py --num-samples 100 --seed 42
# Generate without videos
python examples/generate.py --num-samples 100 --no-videos
# Custom output directory
python examples/generate.py --num-samples 100 --output data/my_output| Argument | Type | Description | Default |
|---|---|---|---|
--num-samples |
int | Number of samples to generate | 100 |
--seed |
int | Random seed for reproducibility | Random |
--output |
str | Output directory | data/questions |
--no-videos |
flag | Skip video generation | False |
The scene shows several rectangles with different widths and heights. A rectangle matches a 2:1 aspect ratio if its longer side is about twice its shorter side, regardless of orientation. First compare all rectangles and determine which single rectangle is closest to a 2:1 aspect ratio, then draw one red circle around that rectangle. Do not circle any other rectangles. Show the complete solution step by step.
 |
 |
 |
| Initial Frame Rectangles with varied aspect ratios |
Animation Red circle drawn around 2:1 rectangle |
Final Frame Target rectangle circled in red |
Compare the aspect ratios of multiple rectangles to identify which one is closest to 2:1 (longer side approximately twice the shorter side) and mark it with a red circle.
- Rectangle Count: 3-5 rectangles per image
- Rectangle Dimensions: Side lengths between 80-220 pixels
- Target Rectangle: Aspect ratio 1.95-2.05 (very close to 2:1)
- Distractor Rectangles:
- Low distractors: aspect ratio ≤1.40 (further from 2:1)
- High distractors: aspect ratio ≥2.70 (further from 2:1)
- All distractors at least 0.40 away from 2.0
- Uniqueness Guarantee: Target rectangle has at least 0.25 margin over second-best candidate
- Circle Properties: 8-pixel red stroke, 18-pixel padding around target
- Spacing: Minimum 14-pixel gap between rectangles
- Orientation-independent: 2:1 ratio recognized in both horizontal and vertical orientations
- Clear distinction: Target definitively closest to 2:1 with guaranteed margin
- Diverse colors: 12-color palette for rectangle fills (red reserved for marking)
- Non-overlapping layout: Rectangles maintain minimum spacing
- Unambiguous answer: Only one rectangle is closest to 2:1 ratio
- Step-by-step animation: Shows reasoning process and circle placement (10 hold + 60 transition + 20 hold frames)
data/questions/select_nearest_2:1_rectangle_task/select_nearest_2:1_rectangle_00000000/
├── first_frame.png # Initial state (rectangles without marking)
├── final_frame.png # Goal state (nearest-to-2:1 circled)
├── prompt.txt # Task instructions
├── ground_truth.mp4 # Solution video (16 fps)
└── question_metadata.json # Task metadata
File specifications: Images are 1024×1024 PNG. Videos are MP4 at 16 fps, approximately 5.6 seconds long.
geometry aspect-ratio rectangle-analysis proportions spatial-reasoning ratio-comparison
