Recent challenges in intelligent information and database systems : 15th Asian Conference ACIIDS 2023 Phuket Thailand July 24 26 2023 proceedings This book constitutes the second part of the proceedings of the 15th Asian Conference on Intelligent Information and Database Systems ACIIDS 2023 held in Phuket Thailand during July 24 26 2023. The 50 full papers included in this book were carefully reviewed and selected from 224 submissions. They were organized in topical sections as follows: Computer Vision Cybersecurity and Fraud Detection Data Analysis Modeling and Processing Data Mining and Machine Learning Forecasting and Optimization Techniques Healthcare and Medical Applications Speech and Text Processing