Visual saliency is an important quality that makes an object, person, or pixel that relative to its neighbors and thus captures humans attention. Detecting and segmenting salient objects in natural imageries, also known as salient object detection, has attracted a lot of research focused on computer vision and has resulted in many applications. However, while many such models exist. Saliency detection has gained a lot of attention in image processing. In past few years many saliency detection methods have been proposed. This paper presents various saliency detection methods.