Onion bulbs are graded manually at farm and trader level.Manual grading of onion is a labour consuming and tedious operation coming with many losses. Therefore, the modern technologies, like automatic grading systems, are of utmost need. Grading is one of the most important operations affecting onion export. It determines the size of standard sale package, thereby increasing marketing attractiveness, and simplifies the mechanization of different handling systems, such as cutting and peeling. There are different types of onion graders available in the Indian market. These are of higher...