Change detection

Change detection is a method of noticing when something has changed. For example, if you are keeping track of how many apples are in a bowl, you can use change detection to know when apples have been taken or added. You could do this by counting the number of apples every day, or marking each apple in the bowl with a special symbol. Change detection can be used to notice subtle changes in a lot of things, like numbers, images, or even the weather!