This book is the second volume of the proceedings of the Fifth World Conference on Intelligent and 3D Technologies (WCI3DT 2026). The chapters in the book are arranged into three groups according to their content:
   I. Intelligent Image Processing
  II. Advances in Intelligent Control Systems
 III. Computational Intelligence for Signal Analysis and Interpretation
This book covers significant part of the theoretical approaches in the contemporary intelligent signal processing and analysis, robotics, image analysis and related applications based on AI, virtual and augmented reality, etc., and are focused on various important topics, as: Deep learning-based reconstruction algorithms; VR-based technologies; digital image processing and classification; video content understanding; multidimensional signal processing; humanoid robots interaction and robots control; distributed AI-based systems, remote sensing images analysis, and many others.

Roumiana Kountcheva got her M.Sc. and Ph.D. at the Technical University of Sofia, Bulgaria. In 1992, she got the title Senior Researcher. At present, she is the vice president of TK Engineering, Sofia. She had postgraduate trainings in Fujitsu and Fanuc, Japan. Her main scientific interests are in image processing, image compression, digital watermarking, pattern recognition, image tensor representation, neural networks, CNC, and programmable controllers. She has more than 240 publications and 5 patents (EU and USA). R. Kountcheva was the plenary speaker at 34 international scientific conferences and scientific events. She was a co-editor of more than 10 books published in Springer SIST series and of several Special issues for Symmetry MDPI. She is a member of international organizations: Bulgarian Association for Pattern Recognition, International Research Institute for Economics and Management (IRIEM), and the Institute of Data Science and Artificial Intelligence (IDSAI).

Professor Wenfeng Wang is an editor-in-chief of IJANS and IJEEE; EBM of Nature—Scientific Reports; general chair of the World Conference on Intelligent and 3D Technologies; reviewer of many SCI journals, including some top ones—Nature Computational Science, Expert System with Applications, Water Research, Science China-Information Sciences, Science of the Total Environment, Environmental Pollution, IEEE Transactions on Automation Science and Engineering, etc.; Plenary/Keynote speakers of many international conferences—AMICR2019, IACICE2020, NAMSP2021, NAMSP2024, AMMCS2021, ICCEAI2021, AICS2021, 3DIT-MSP&DL2020, CSAMCS 2021, AMMCS2021, ICPEM2021, ATAMI2021, ICRDET2022, etc.

Prof. Srikanta Patnaik is the director of Interscience Institute of Management & Technology, Bhubaneswar, India. He has received his Ph.D. in Engineering on Computational Intelligence from Jadavpur University, India, in 1999 and supervised more than 30 Ph.D. theses and more than 60 Master theses in the area of Computational Intelligence, Soft Computing Applications, and Re-Engineering. Dr. Patnaik has published around 100 research papers in international journals and conference proceedings. He is the author of 3 text books and more than 80 edited volumes and few invited book chapters, published by leading international publisher like Springer-Verlag, Kluwer Academic, etc. He is the editor of Journal of Information and Communication Convergence Engineering, published by Korean Institute of Information and Communication Convergence Engineering. He is also an associate editor of International Journal of Granular Computing, Rough Sets and Intelligent Systems (IJGCRSIS) published by Inderscience Publishing House, England.