When the matrix size of a digital image decreases, what happens to the size of the pixels within the image?

When the matrix size of a digital image decreases, it means that the overall resolution of the image is reduced, leading to a larger representation of individual pixels. In this context, the pixel size increases because the fewer number of pixels must cover the same physical area, resulting in each pixel taking up a larger portion of that space.

This concept is tied to the way digital images are displayed; if you have an image that was originally composed of a certain number of pixels (the matrix size), reducing that number while keeping the same physical dimensions of the image effectively means each remaining pixel must be larger to fill the same space. Therefore, as the matrix size decreases, the size of each pixel within the image increases.