Flame detection is a research field and methodological approach focused on identifying the presence of combustion flames through the analysis of their characteristic physical phenomena. It investigates the spectral radiation (UV, visible, IR), thermal emissions, flicker patterns, and other unique signatures emitted by flames, employing various sensing technologies and signal processing algorithms. This concept is significant for enabling early fire warning systems, monitoring industrial processes, and ensuring safety in environments where uncontrolled combustion poses a risk.