Ying-Heng Yeo, and Kin-Sam Yen. “Impurities Detection in Intensity Inhomogeneous Edible Bird’s Nest (EBN) Using a U-Net Deep Learning Model”. International Journal of Engineering and Technology Innovation, Vol. 11, no. 2, Apr. 2021, pp. 135-4, doi:10.46604/ijeti.2021.6891.