  With the advancement of technology, we have supercomputers with high
processing power and affordable prices. In addition, using multimedia expanded
all around the world. This caused a vast use of images and videos in different
fields. As this kind of data consists of a large amount of information, there
is a need to use compression methods to store, manage or transfer them better
and faster. One effective technique, which was introduced is variable
resolution. This technique stimulates human vision and divides regions in
pictures into two different parts, including the area of interest that needs
more detail and periphery parts with less detail. This results in better
compression. The variable resolution was used for image, video, and 3D motion
data compression. This paper investigates the mentioned technique and some
other research in this regard.
