Deep Learning Applied to Defect Detection in Powder Spreading Process of Magnetic Material Additive Manufacturing oleh Hsin-Yu Chen, Ching-Chih Lin, Ming-Huwi Horng, Lien-Kai Chang, Jian-Han Hsu, Tsung-Wei Chang, Jhih-Chen Hung, Rong-Mao Lee, Mi-Ching Tsai