---
dataset_info:
  features:
    - name: image
      dtype: image
    - name: question
      dtype: string
    - name: answer
      dtype: string
    - name: text_only_question
      dtype: string
    - name: trivial_text_only_question
      dtype: string
  splits:
    - name: train
      num_examples: 5000
    - name: dev
      num_examples: 300
    - name: test
      num_examples: 500
task_categories:
  - visual-question-answering
  - image-to-text
language:
  - en
pretty_name: MeasureBenchClock-Diverse-Synthetic
---

# MeasureBenchClock-Diverse-Synthetic

MeasureBenchClock-Diverse-Synthetic is a synthetic analog clock-reading dataset generated using a modified and diversified version of the MeasureBench clock-generation code.

This dataset is intended for supervised finetuning and reinforcement-learning experiments on analog-clock reading. It is not an official MeasureBench release.

## Generation

Images are generated using a configurable synthetic analog clock renderer. The generator varies resolution, clock placement, dial shape, color palette, background, hand styles, tick marks, numerals, second-hand visibility, and clock layout.

## Answer policy

If the second hand is visible, the answer is given in 12-hour `H:MM:SS` format.

If the second hand is not visible, the answer is given as the nearest minute in 12-hour `H:MM` format. Hidden seconds may still affect the rendered hour and minute hand positions, but the model is not asked to predict hidden seconds.

No interval labels are used.

## Fields

- `id`: Unique sample ID.
- `split`: Dataset split.
- `image`: Generated clock image.
- `image_path`: Relative path to the generated PNG.
- `question`: Image-based clock-reading prompt.
- `answer`: Gold answer string.
- `text_only_question`: Angle-based text-only version of the question.
- `trivial_text_only_question`: Tick-position text-only version of the question.
- `hour`, `minute`, `second`: Underlying rendered time.
- `show_second_hand`: Whether the second hand is visible.
- `answer_format`: Either `H:MM:SS` or `H:MM`.
- `style_name`: High-level generator style.
- `theme`: Sampled visual theme.
- `layout`: Clock placement layout.
- `dial_shape`: Dial shape.
- `width`, `height`: Image resolution.
- `hour_deg`, `minute_deg`, `second_deg`: Hand angles in degrees clockwise from 12 o'clock.
- `metadata_json`: Additional generator metadata serialized as JSON.

## Intended use

This dataset is intended for training and evaluating models on analog-clock reading, especially for experiments involving synthetic data, supervised finetuning, multimodal reasoning, and follow-up RL training.

## Limitations

The images are synthetic and may not fully match real-world clock photos. Some visual styles are deliberately diverse to improve robustness, but the dataset should not be treated as a substitute for real clock images.

## Showcase

The following showcase contains 50 generated clocks sampled from the configured YAML generation settings.

![50 generated analog clock samples](generated_data/clock_showcase.png)

The following smaller showcase contains 4 generated clocks with the corresponding text-only questions displayed under each image.

![Generated analog clock samples with text-only questions](generated_data/clock_showcase_with_questions.png)