Salih, S.F. and Abdulla, A.A. 2021. An Improved Content Based Image Retrieval Technique by Exploiting Bi-layer Concept. UHD Journal of Science and Technology. 5, 1 (Jan. 2021), 1–12. DOI:https://doi.org/10.21928/uhdjst.v5n1y2021.pp1-12.