Free public beta until December 4, 2026: every course is open, no card needed. After that, the first chapter of each course stays free and full access is a one-time $39 ($19 for up to 100 founding members chosen for helpful feedback). Your progress is kept. How the beta works

🕹️ Practice arcade

Extra games, not extra homework — timed sprints, survival runs that end when your lives run out, and mastery drills built from the same skills Digital Image Processing teaches.

Log in to play — the arcade tracks runs per student.

⚡ Sprints

Beat the clock.

⚡ Gradient Vector Sprint

Build the gradient vector, then its magnitude -- as many as you can in a minute.