O-5: Symbol Deletion Data Generator

Generates synthetic tasks where a sequence of colored geometric symbols is shown with one marked by a red border. The goal is to delete the marked symbol while maintaining the sequential order of all remaining symbols.

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.

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📌 Basic Information

Property	Value
Task ID	O-5
Task	Symbol Deletion
Category	Transformation
Resolution	1024×1024 px
FPS	16 fps
Duration	~3.1 seconds
Output	PNG images + MP4 video

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🚀 Usage

Installation

# Clone the repository
git clone https://github.com/VBVR-DataFactory/O-5_symbol_deletion_data-generator.git
cd O-5_symbol_deletion_data-generator

# Install dependencies
pip install -r requirements.txt

Generate Data

# 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

Command-Line Options

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

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📖 Task Example

Prompt

The scene shows a horizontal sequence of colored geometric symbols arranged from left to right. Each symbol is a distinct geometric shape with a specific color, and exactly one symbol is marked as the deletion target by a red rectangular border surrounding it. In symbol deletion tasks, the target symbol identified by the red border must be deleted from the sequence while all remaining symbols maintain their original sequential order. First identify the symbol marked with the red border, then delete it from the sequence. The final state must show the remaining symbols in their original order, with the target symbol completely removed. The deletion operation affects only the single marked symbol, leaving all other symbols unchanged in their shapes, colors, and sequential positions.

Visual

Initial Frame Symbol sequence with red-bordered target	Animation Target symbol disappears from sequence	Final Frame Target removed, order preserved

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📖 Task Description

Objective

Delete the symbol marked with a red border from the sequence while maintaining the original sequential order of all remaining symbols.

Task Setup

• Symbol Sequence: Horizontal arrangement of colored geometric symbols
• Target Marking: Exactly one symbol marked with red rectangular border
• Deletion: Remove marked symbol completely from sequence
• Order Preservation: All remaining symbols maintain their original sequential order
• Position Preservation: Remaining symbols stay at their original positions (no movement)
• Single Target: Only one symbol is removed per task

Key Features

• Target identification: Finding the symbol marked with red border
• Selective deletion: Removing only the marked symbol
• Sequence preservation: Maintaining order of remaining elements
• Position preservation: All remaining symbols retain their original positions
• Unchanged properties: All remaining symbols retain original shape, color, and position
• Instruction following: Executing precise deletion as directed

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📦 Data Format

data/questions/symbol_deletion_task/symbol_deletion_00000000/
├── first_frame.png      # Initial state (sequence with marked target)
├── final_frame.png      # Goal state (target deleted)
├── prompt.txt           # Task instructions
├── ground_truth.mp4     # Solution video (16 fps)
└── question_metadata.json # Task metadata (objects, target_index, etc.)

File specifications: Images are 1024×1024 PNG. Videos are MP4 at 16 fps, approximately 3.1 seconds long.

Metadata Format

The question_metadata.json file contains structured information about each task:

{
  "version": "1.0",
  "task_id": "symbol_worlds_symbol_editing_00000000",
  "generator": "symbol_worlds_symbol_editing",
  "timestamp": "2026-02-15T01:02:32.575886",
  "parameters": {
    "target_index": 2,
    "objects": [
      {
        "symbol": "diamond",
        "center": [377, 512],
        "color": [230, 200, 50]
      },
      {
        "symbol": "square",
        "center": [512, 512],
        "color": [180, 50, 180]
      },
      ...
    ]
  },
  "param_hash": "...",
  "generation": {
    "seed": 42,
    "generator_version": "1.0"
  }
}

• target_index: Index of the object to be deleted (0-based)
• objects: Array of all objects in the sequence, each containing:
  • symbol: Shape name (e.g., "circle", "square", "triangle", "star", "diamond", "hexagon")
  • center: Center position [x, y] in pixels
  • color: RGB color [R, G, B]

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🏷️ Tags

sequential-reasoning symbol-manipulation deletion target-identification sequence-preservation instruction-following selective-removal

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