Dewarp

Graphical user interface to perform a perspective transform ("dewarp") from a quadrilateral cropped from a picture to a rectangle.

Requirements

Python 3.6+

Run

python3 dewarp.py (Linux) or py dewarp.py (Windows).

Common aspect ratios

DIN A: 1:sqrt(2) = 1.4142135623730951 (basically all normal paper sizes, DIN A, DIN B)
ID 1: 85.60 × 53.98 = 1.58577 (Creditcards, IDs, business cards, ...)