Grapes are familiar fruits in the Mediterranean, Central Europe and Southwest Asia. Various components of this plant have many uses, including leaves used in the preparation of foods. The quality of the grape leaves is especially important for the preparation of food and this requires careful consideration. One of the indicators of grape leaf selection in food is its surface integrity and absence of grooves. In this paper, by using image processing technique, the geometrical characteristics of the grape leaf including its area and perimeter are extracted and numerical value is given based on the defined index. For this purpose, leaves of four grape varieties were collected from different areas of Boroujerd City in Iran and modeling was done according to this research method. By categorizing the results that range between zero and one, two grape varieties have better Quality Index than other varieties and it is suggested as a suitable type for leaf use.