This book gathers selected papers presented at the Fifth International Symposium on Signal and Image Processing (ISSIP 2024). It presents fascinating state-of-the-art research findings in signal and image processing. It includes conference papers covering many signal-processing applications involving filtering, encoding, classification, segmentation, clustering, feature extraction, denoising, watermarking, object recognition, reconstruction, and fractal analysis. It addresses various types of signals, such as image, video, speech, non-speech audio, handwritten text, geometric diagram, and ECG and EMG signals; MRI, PET, and CT scan images; THz signals; solar wind speed (SWS) signals; and photoplethysmography (PPG) signals, and demonstrates how new paradigms of intelligent computing, like quantum computing, can be applied to process and analyze signals precisely and effectively.