Orange (citrus Aurantium) is one of the much in demand winter fruits in Iran; therefore it is
important to sort its quality for marketing. The first superficial property of fruit that makes attraction is its
volume and size. In recent researches it was shown that its volume would be correspond to other properties
such as taste and amount of glucose. Current methods for determining volume are often slow and harmful,
and aren't usable collectively. In this research, volume of other 23 oranges has obtained by image processing
method (IPM) and compare with volumes that measured by water displacement method (WMD). Then the Ttest
examination of paired samples doesn’t show meaningful difference in 95% level among obtained
volumes from these two methods. In addition, the one by one graph shows data more closely.