Picture

A picture, also called an image, is a group of coloured points on a flat surface that looks the same as something else. For example, a picture can look the same as an object or a person. Pictures can also be drawings, paintings or photographs. People who make such pictures are called artists, photographers or painters. Pictures are very helpful. Sometimes people say pictures are worth a thousand words. Pictures and diagrams can be used to explain how to do things, and thus a picture is a kind of tool. A moment captured in an image.

The Simple English Wiktionary has a definition for: picture.

An image is something that can be seen, but it is not physically there. It can be a photograph, a painting, or a picture on a television or computer screen. A lens can make an image of an object appear somewhere else. Cameras use this to make the image that becomes a photograph.