Low Resolution: A Survey of Realism
The more distant an object, say a person, is the smaller the image of that object will be on your retina, the back of the eyes where we really begin to "see". This effect on object size as distance increases is illustrated in the figure to the right.
The concept of using the atoms and molecules expresses this title as the smallest poster in the world since a resolution is the capability of the sensor to observe or measure the smallest object clearly with distinct boundaries.
Since the resolution depends upon the size of the pixel, this pixelated web poster illustrates the low DPI itself in an optical way.