A powerful CLI tool for visualization and encoding of PAGE-XML files.
Developed in order to enable the process of parsing PAGE-XML files and drawing their layout annotations on the pages images without having to write code, while still providing the maximum of the OpenCV polygon drawing capabilities to the user.
Built around the 2019-07-15 Page Content PAGE-XML schema.
Supports colors in RGB hex string format (e.g. ffffff) and also color names following the CSS3 convention through the webcolors package.
git clone https://github.com/GBN-DBP/page-xml-draw.git
cd page-xml-draw/
pip3 install .
or simply
pip3 install git https://github.com/GBN-DBP/page-xml-draw.git
The application flow consists of traversing the (PAGE-)XML content in order to find the layout annotation nodes, extract their polygons and then draw the overlays on the image. The user has to describe the traversal by specifying which node types are to be visited (and in which order) and when a given annotation type is supposed to be drawn, the overlay properties (e.g. color, transparency) must be also specified.
usage: page-xml-draw [-h] -i <path/to/file>.xml -o <path/to/file>.{png,jpg} [-b <path/to/dir>] [-p <path/to/file>.json]
[--page] [--border] [--print-space] [--text-region] [--image-region] [--line-drawing-region]
[--graphic-region] [--table-region] [--chart-region] [--map-region] [--separator-region]
[--maths-region] [--chem-region] [--music-region] [--advert-region] [--noise-region]
[--unknown-region] [--custom-region] [--text-line] [--word] [--glyph] [--graphemes] [--grapheme]
[--fill-color (<hex> | <name>)] [--edge-color (<hex> | <name>)] [--edge-thickness [0 .. inf]]
[--opacity [0.0 - 1.0]]
optional arguments:
-h, --help show this help message and exit
-i, --input <path/to/file>.xml path to input PAGE-XML file
-o, --output <path/to/file>.{png,jpg} path to output image file
-b, --base-dir <path/to/dir> path to base directory relative to PAGE-XML file content
-p, --profile <path/to/file>.json path to pre-defined json profile describing what has to be done
--page visit the 'Page' PAGE-XML annotations
--border visit the 'Border' PAGE-XML annotations
--print-space visit the 'PrintSpace' PAGE-XML annotations
--text-region visit the 'TextRegion' PAGE-XML annotations
--image-region visit the 'ImageRegion' PAGE-XML annotations
--line-drawing-region visit the 'LineDrawingRegion' PAGE-XML annotations
--graphic-region visit the 'GraphicRegion' PAGE-XML annotations
--table-region visit the 'TableRegion' PAGE-XML annotations
--chart-region visit the 'ChartRegion' PAGE-XML annotations
--map-region visit the 'MapRegion' PAGE-XML annotations
--separator-region visit the 'SeparatorRegion' PAGE-XML annotations
--maths-region visit the 'MathsRegion' PAGE-XML annotations
--chem-region visit the 'ChemRegion' PAGE-XML annotations
--music-region visit the 'MusicRegion' PAGE-XML annotations
--advert-region visit the 'AdvertRegion' PAGE-XML annotations
--noise-region visit the 'NoiseRegion' PAGE-XML annotations
--unknown-region visit the 'UnknownRegion' PAGE-XML annotations
--custom-region visit the 'CustomRegion' PAGE-XML annotations
--text-line visit the 'TextLine' PAGE-XML annotations
--word visit the 'Word' PAGE-XML annotations
--glyph visit the 'Glyph' PAGE-XML annotations
--graphemes visit the 'Graphemes' PAGE-XML annotations
--grapheme visit the 'Grapheme' PAGE-XML annotations
--fill-color (<hex> | <name>) fill annotation polygons with specified color
--edge-color (<hex> | <name>) draw annotation polygon edges with specified color
--edge-thickness [0 .. inf] draw annotation polygon edges with specified thickness
--opacity [0.0 - 1.0] draw annotation polygons with specified opacity