Dark noise refers to the random electrical signals or fluctuations that are present in electronic systems, particularly in imaging devices like cameras or sensors, even when no external stimuli are present. It is independent of any intended input and arises due to thermal effects and imperfections in electronic components. In imaging technology, dark noise can manifest as speckles or unwanted pixel variations in images, reducing overall image quality. To mitigate its effects, techniques like cooling sensors or employing noise reduction algorithms are used. Understanding and minimizing dark noise is crucial in fields like astronomy, where sensitive detectors are used to capture faint celestial signals amidst the inherent background noise.