# Line image extractor
This is a tool and a library to be used for extracting line images. Built by [Teklia](https://teklia.com) and freely available as open-source under the MIT licence.
It supports different extraction methods:
* boundingRect - bounding rectangle of the line polygon
* polygon - exact polygon
* min_area_rect - minimum area rectangle containing the polygon
* deskew_polygon - deskew the polygon
* deskew_min_area_rect - deskew the minimum area rectangle
* skew_polygon - skew the polygon (rotate by some angle)
* skew_min_area_rect - skew the minimum area rectangle (rotate by some angle)
Install the library using stable version from Pypi:
```bash
pip install teklia-line-image-extractor
```
Install the library in development mode:
```bash
pip install -e .
```
Test extraction:
```bash
line-image-extractor -i tests/data/page_img.jpg -o out.jpg -p tests/data/line_polygon.json -e deskew_min_area_rect --color
```
How to use it?:
```python
from pathlib import Path
import numpy as np
from line_image_extractor.extractor import extract, read_img, save_img
from line_image_extractor.image_utils import polygon_to_bbox
from line_image_extractor.image_utils import Extraction
page_img = read_img(Path("tests/data/page_img.jpg"))
polygon = np.asarray([[241, 1169], [2287, 1251], [2252, 1190], [244, 1091], [241, 1169]])
bbox = polygon_to_bbox(polygon)
extracted_img = extract(
page_img, polygon, bbox, Extraction.polygon
)
save_img("line_output.jpg", extracted_img)
```
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"description": "# Line image extractor\n\nThis is a tool and a library to be used for extracting line images. Built by [Teklia](https://teklia.com) and freely available as open-source under the MIT licence.\n\nIt supports different extraction methods:\n* boundingRect - bounding rectangle of the line polygon\n* polygon - exact polygon\n* min_area_rect - minimum area rectangle containing the polygon\n* deskew_polygon - deskew the polygon\n* deskew_min_area_rect - deskew the minimum area rectangle\n* skew_polygon - skew the polygon (rotate by some angle)\n* skew_min_area_rect - skew the minimum area rectangle (rotate by some angle)\n\nInstall the library using stable version from Pypi:\n\n```bash\npip install teklia-line-image-extractor\n```\n\nInstall the library in development mode:\n\n```bash\npip install -e .\n```\n\nTest extraction:\n\n```bash\nline-image-extractor -i tests/data/page_img.jpg -o out.jpg -p tests/data/line_polygon.json -e deskew_min_area_rect --color\n```\n\nHow to use it?:\n\n```python\nfrom pathlib import Path\nimport numpy as np\nfrom line_image_extractor.extractor import extract, read_img, save_img\nfrom line_image_extractor.image_utils import polygon_to_bbox\nfrom line_image_extractor.image_utils import Extraction\n\npage_img = read_img(Path(\"tests/data/page_img.jpg\"))\npolygon = np.asarray([[241, 1169], [2287, 1251], [2252, 1190], [244, 1091], [241, 1169]])\nbbox = polygon_to_bbox(polygon)\nextracted_img = extract(\n page_img, polygon, bbox, Extraction.polygon\n)\nsave_img(\"line_output.jpg\", extracted_img)\n```\n",
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