The Identification of the Apples (Malus Sylvestris) Skin Wax Coating Using the Edge Detection Method

Wax coating is generally used for the post-harvesting process of Malang apples (malus sylvestris). So far, the process of examining the wax coating still uses the sense of touch, which is found difficult to do. This research aims to identify the layers of wax using a computerized process. The edge detection method was tested to recognize the patterns on the skin of the wax-coated and uncoated apple. This method was possible to use since the wax coating is sensitive to light although it is transparent. It makes the wax-coated apple skin tend to be shinier than the uncoated one. After recognizing the patterns, the standard deviation of the edge detection results was measured. The results showed that uncoated apples had a standard deviation value between 17.4992 and 42.2488. Whereas the wax-coated apple had a standard deviation value between 32.7809 and 64.2292. The deviation appeared to be between 5.1079 to 39.3531. These results indicated that the standard deviation value for wax-coated apples tended to be higher than the uncoated ones. Based on these results, it was shown that the edge detection method was able to show the significant patterns to identify the presence of the wax coating on the apple's skin.