---
pretty_name: LineEX Test Split
task_categories:
- image-classification
- object-detection
- image-to-text
size_categories:
- 10K<n<100K
configs:
- config_name: default
  data_files:
  - split: test
    path: data/test-*
---

# LineEX Test Split

This dataset is a structured Hugging Face mirror of the `test` split released with the
LineEX paper, "LineEX: Data Extraction from Scientific Line Charts" (WACV 2023).

- Repo: `13point5/lineex-test`
- Split: `test`
- Rows: `20,000`
- Source format: PNG images plus COCO-style chart-element and line annotations

## Columns

- `image_id`
- `file_name`
- `image`
- `width`
- `height`
- `data_type`
- `chart_elements`
- `lines`

## `chart_elements` fields

- `annotation_id`
- `category_id`
- `category_name`
- `bbox_xywh`
- `area`
- `text`
- `line_id`

## `lines` fields

- `annotation_id`
- `category_id`
- `category_name`
- `line_name`
- `polyline_xy`
- `raw_series_xy`
- `area`

## Chart element category mapping

- `0`: `Legend`
- `1`: `ValueAxisTitle`
- `2`: `ChartTitle`
- `3`: `CategoryAxisTitle`
- `4`: `PlotArea`
- `5`: `InnerPlotArea`
- `6`: `XY_Ticks`
- `7`: `LegendMarker`
- `8`: `LegendText`
- `9`: `LegendElement`

## Notes

- The original `cls_anno.json` category list is incomplete relative to the annotation IDs.
  This mirror uses the 10-class mapping defined in the LineEX codebase.
- `line_id` links legend marker annotations to line annotations within the same image.
- `lines.line_name` is derived from the legend structure and may be `null` when no legend-text
  association can be inferred for a series.
- This repo mirrors only the `test` split.

## License

This mirror does not assert a new license for the data. Verify redistribution terms with the
original dataset authors before making the dataset public.