There are a lot of genre of photography, but they are divided into two major categories that are documentary and art. Abstract photography belongs to the second category. It is the unity of texture, shape, color, and pattern. Abstract photography has no particular rule, and every photographer creates a variety of variations, depending on how they use their creative ability to attract and inspire viewers.

http://rephotosolution.com/blog/tips-to-take-greate-abstract-photographs/