Math

Just notes about Epipolar Consistency of X-Ray Images

When you first see an expression like

it looks impossible to compute. The number \(9^{2018}\) is unimaginably large — far beyond what any calculator can display.

Fortunately, modular arithmetic has a wonderful property: even enormous powers often fall into small repeating cycles. Once you notice the pattern, the problem becomes surprisingly simple.

This post walks you through the reasoning step by step.

From time to time, I need to fill images with random values — and do it quickly. There are two simple yet elegant algorithms to achieve this.