AUTHOR=Qiu Guoping TITLE=Challenges and opportunities of image and video retrieval JOURNAL=Frontiers in Imaging VOLUME=1 YEAR=2022 URL=https://www.frontiersin.org/journals/imaging/articles/10.3389/fimag.2022.951934 DOI=10.3389/fimag.2022.951934 ISSN=2813-3315