Abstract photography is a form of photographic art that is not representational of real objects. The photographer will just take the essence of the photo and then use color or form, or both, in aesthetic arrangement until it becomes an art. Here, rules such as composition and accurate focusing hold no values as the photographer will only need his creative imagination to create a stunning work of art.
You can use colors and patterns and combine them to form an image that has no true meaning or clear subject. The rewards of abstract photography are worthwhile, since art buyers pay a good amount for these arts.