What do you see when you look at this image? Well, it's a cute dog playing with a ball. Easy, right? This seemingly obvious observation is not an easy task for a computer. How does a computer that processes everything in 0s and 1s even store this image?

The answer is matrices!

A digital image is made up of small indivisible units called pixels. Each pixel of an image is represented by an intensity value. Therefore, an image is essentially a matrix whose elements are the intensity values of each individual pixel.

To expand, compress, crop or perform any operation on these images, linear algebra is most likely involved.