Digital imaging is a research field and methodological approach concerned with the acquisition, processing, storage, transmission, and display of visual information represented as discrete numerical data. This domain investigates the theoretical underpinnings, algorithms, and technologies enabling the conversion of optical phenomena or other signals into digital image formats, their subsequent computational manipulation and analysis, and their reconstruction for viewing or further processing. Its significance lies in facilitating quantitative analysis, enhancing image quality and interpretability, and enabling a wide array of applications in science, medicine, engineering, and media.