Lets say a rectangular object has 100 x 200 cm dimensions. Suppose I need to draw an image(Parallel View) of the object from 25cm away. The apparent size of the object obviously gets reduced.
Referred Links:
http://www.giantitp.com/forums/archive/index.php/t-294360.html
Calculating size of an object based on distance
According to the above links, The Apparent Length = Original Length/25?? Or any other parameters influence the dimensions?