python-gridwindow

A mini python library that provides grid visualization of multiple images/videos in a single opencv window.
Suppose you want to see multiple videos at same time in a single opencv window. This library will take care of placement and scaling of the videos for you, even when a disposition is not trivial.
The aspect ratio will be preserved but the videos might be scaled down to fit inside the (max_width, max_height) specified.

Installation

Install requirements.

git clone https://github.com/JunkyByte/python-gridwindow.git
cd python-gridwindow/
pip install .

Usage

A single class MagicGrid is exposed.

from gridwindow import MagicGrid
window = MagicGrid(max_width=1280, max_height=720)

while True:
    # images = ...
    if window.update(images) & 0xFF == ord('q'):
        break

Check gridwindow/grid_window.py:MagicGrid and demo.py for more details.

How?

In the end this project needs to solve a rectangle packing problem which is NP hard. To find a solution we use rpack.

Why?

I wrote a grid based window for another project with multiple cameras operating at the same time. I wondered how it could be adapted to support any number of videos and resolutions. This was fun.