The example of perception that I have witnessed is the World Wildlife Foundation symbol. To many people, it simply looks like a panda. When I first saw this image on the television, I also immediately perceived this as a panda. However, many people do not realize that this is an example of an illusion that they are seeing in their everyday lives. Since the panda is mostly black, the other lines are not necessary to complete the outline of the panda. The human eye automatically fills out the rest of the panda, even though there is not a black line at the top of the panda, and it is actually just blank space.

            This is an example of middle vision, which is a stage of visual processing that comes after basic feature extraction and before object recognition and scene understanding. With the panda, the main features of the panda that are black have already been recognized. However, it requires middle vision in order to determine what the object is completely, since the panda is not completely drawn. Middle vision also involves the perception of edges and surfaces. This is what is happening with the panda. The panda is seen as a whole object because we are perceiving its edges.

            Middle vision also helps to determine which regions of an image should be grouped together into objects. For example, the black parts of the panda are immediately grouped together at first. These black parts of the panda then help to determine the parts that should be grouped together to make the entire symbol. The white parts of the panda is actually just blank space, not part of the panda. Middle vision plays a part in the perception that the blank space actually being a part of the panda, even though it technically is not.