Wongkong, Udomsak, Sutthithep Sukwiboon, Phlai Chansom, and Thossaporn Kaewwichit. 2020. “Defect Classification and Detection on Grinding Shaft using Digital Image Processing Process with A-KAZE Features”. Defence Technology Academic Journal 2 (6). Bangkok, Thailand:106-15. https://sc01.tci-thaijo.org/index.php/dtaj/article/view/240487.