Early detection of slight bruises in apples by cost-efficient near-infrared imaging

Near-infrared (NIR) spectroscopy has been widely reported for its useful applications in assessing internal fruit qualities. Motivated by apple consumption the global market, this study aims to evaluate possibility of applying NIR imaging detect slight bruises fruits. A simple optical setup was designed, and low-cost system components were used promote future development practical cost-efficient devices. To effectiveness proposed approach, created a mild impact with comparably low energy only 0.081 Joules. Experimental results showed that 100% Jazz Gala apples accurately detected immediately after bruising within 3 hours storage. Thus, it is promising develop customer devices not fruits but also other soft thin skin at their early damage stages.