A hybrid quantum-classical segment-based Stereo Matching algorithm -- Continuous Exposure for Extreme Low-Light Imaging -- Semi-supervised Classification and Segmentation of Forest Fire using Autoencoders -- Descriptive and coherent paragraph generation for image paragraph captioning using vision transformer and post-processing -- Pyramid Swin Transformer for Multi-Task: Expanding to more computer vision tasks -- Person activity classification from an aerial sensor based on a multi-level deep features -- Person Quick-Search Approach based on a Facial Semantic Attributes Description -- Age-Invariant Face Recognition using Face Feature Vectors and Embedded Prototype Subspace Classifiers -- BENet: A lightweight bottom-up framework for context-aware emotion recognition -- Yolopoint: Joint Keypoint and Object Detection -- Less-than-one shot 3d segmentation hijacking a pre-trained space-time memory network -- Segmentation of Range-Azimuth Maps of FMCW radars with a deep convolutional neural network -- Segmentation of Range-Azimuth Maps of FMCW radars with a deep convolutional neural network -- A Single Image Neuro-Geometric Depth Estimation -- Wave-shaping Neural Activation for Improved 3D Model Reconstruction from Sparse Point Clouds -- A Deep Learning Approach to Segment High-Content Images of the E.coli Bacteria -- Multimodal Emotion Recognition System Through Three Different Channels (MER-3C) -- Multi-Modal Obstacle Avoidance in USVs via Anomaly Detection and Cascaded Datasets -- A Contrario Mosaic Analysis for Image Forensics -- IRIS SEGMENTATION TECHNIQUE USING IRIS-UNet METHOD -- Image Acquisition by Image Retrieval with Color Aesthetics -- Improved Obstructed Facial Feature Reconstruction for Emotion Recognition with Minimal Change CycleGANs -- Quality assessment for high dynamic range stereoscopic omnidirectional image system -- Genetic Programming with Convolutional Operators for Albatross Nest Detection from Satellite Imaging -- Reinforcement Learning for truck Eco-driving: a serious game as driving assistance system -- Underwater mussel segmentation using smoothed shape descriptors with random forest -- A 2D Cortical Flat Map Space for Computationally Efficient Mammalian Brain simulation -- Construction of a novel data set for pedestrian tree species detection using google street view data -- Texture-based Data Augmentation for Small Datasets -- Multimodal Representations for Teacher-Guided Compositional Visual Reasoning -- Enhanced Color QR Codes with Resilient Error Correction for Dirt-Prone Surfaces.

This book constitutes the proceedings of the 21st International Conference on Advanced Concepts for Intelligent Vision Systems, ACIVS 2023, held in Kumamoto, Japan, during August 2023. The 31 papers presented in this volume were carefully reviewed and selected from a total of 48 submissions. They were organized in topical sections named: Computer Vision, Affective Computing and Human Interactions, Managing the Biodiversity, Robotics and Drones, Machine Learning.