The 20th Chinese Congress on Image and Graphics of Young Scientists was held in Hangzhou, Zhejiang Province from December 13 to 15, 2024. The conference focused on the frontiers and hot topics in the field of image and graphics, covering important research areas and directions, with more than 200 high-level reports and over 1,600 participants. The conference aimed to provide an academic exchange and discussion platform for outstanding young scholars in the field of image and graphics, and promote in-depth dialogue and cooperation between academia and industry. Professor Kaiyu Cui was invited to give a presentation, introducing the recent research work on on-chip spectral imaging and in-sensor computing. The title of the presentation was "Real-time ultraspectral imaging chip based on metasurfaces".