The fivevolume set LNCS 14355 14356 14357 14358 and 14359 constitutes the refereed proceedings of the 12th International Conference on Image and Graphics ICIG 2023 held in Nanjing China during September 2224 2023.The 166 papers presented in the proceedings set were carefully reviewed and selected from 409 submissions. They were organized in topical sections as follows computer vision and pattern recognition computer graphics and visualization compression transmission retrieval artificial intelligence biological and medical image processing color and multispectral processing computational imaging multiview and stereoscopic processing multimedia security surveillance and remote sensing and virtual reality.The ICIG 2023 is a biennial conference that focuses on innovative technologies of image video and graphics processing and fostering innovation entrepreneurship and networking. It will feature worldclass plenary speakers exhibits and highquality peer reviewed oral and poster presentations.