Basically, most images are in a compressed format. If a photo has a huge amount of pixels of the same color in a given area, the file format can record this as one piece of information. It’s like when you’re remembering a phone number: it’s a lot easier to remember a sequence if you have two or three numbers that are the same in a row. So, a picture of a blue sky is going to be smaller than a picture of a Jackson Pollock painting.
Latest Answers