The pieces of art done by this artist are perfect examples of how artists use some perception principles to enhance their work. In both pieces, there is an element of bottom-up processing. In bottom-up processing the entirety of the image--or in this case, art--is processed or constructed by the parts that make it up. In the first piece of art, the individual flowers stems, buds, leaves, and butterfly are essentially meaningless individually. But when seen together they portray a scene. In the second piece the tree and three flying birds do the same thing. Working with this bottom-up processing is the figure ground concept, which is one of the six Gestalt principles. As seen in the first artwork, the viewer can either draw their attention to the garden scene (the figure), or to the face of a woman created by these things (the background). Once again this concept is evident in the second image as well - the viewer can focus on the nature seen (figures) or the background that creates the image of a woman's face. As is evident in these pieces of art the perception principles of psychology are used by us everyday, whether we realize it or not.