This shape is equal to one only for a circle and it is less
than one for any other shape. The discrimination process
can be controlled by setting an appropriate threshold. In this
project uses a threshold value of 0.9 for only the rounded
image. The available parking lot will be counted and
displayed in display unit. Fig. 7 shows there are five
detected rounded image with the threshold value above than
0.9. This means there are five available parking lots and it
will be displayed in display panel.