## Otsu’s method for image thresholding explained and implemented

The process of separating the foreground pixels from the background is called thresholding. There are many ways of achieving optimal thresholding and one of the ways is called the Otsu’s method, proposed by Nobuyuki Otsu. Otsu’s method[1] is a variance-based technique to find the threshold value where the weighted variance between the foreground and background …

## Fast nth Fibonacci number algorithm

Definition: The Fibonacci sequence is defined by the equation, where $$F(0) = 0$$, $$F(1) = 1$$ and $$F(n) = F(n-1) + F(n-2) \text{for } n \geq 2$$. This gives us the sequence 0,1,1,2,3,5,8,13 … called the Fibonacci Sequence. This post is about how fast we can find the nth number in the …