DEIVLIZER

Deivlizer is a tool to extract single slides from multi-slide pdf pages.

What you need to run it

You'll need the python3 enviroment with the following packages:

• numpy
• Pillow
• opencv
• pypdfium2

To install the packages simply run:

pip install -r requirements.txt

How to use it

To use the tool you need to run the following command:

python3 deivlizer.py <filename> -o <output>

Note that the output argument is optional and the default is out.pdf.

The other optional arguments are listed with the -h flag and are:

• --scale: Resolution scale of render (scale * 72dpi = output resolution)
• --kernel: Kernel size for the morphological opening operation
• --coord: Reference coordinate for background color detection
• --batch: Batch mode, process all pdf files in the input directory

How it works

The tool uses pypdfium2 to render each page of the pdf into a bitmap image.

For each page the background color is sampled in at the coordinates specified by the -coord argument. The default coordinates are (0, 0).

The background is segmented using a connected components algorithm and the mask is then cleaned up using a morphological opening operation.

The mask is then used to extract the slide from the original image and a new pdf is created and saved.