IdealPhotonics' camera noise tutorial is a guide to systematically analyzing the sources of interference signals in imaging (such as readout noise and shot noise) and their suppression methods. It helps optimize image quality through quantitative analysis (such as noise electron count and signal-to-noise ratio calculation), covering the entire chain from sensor hardware characteristics to algorithm processing.It includes readout noise (e-/pixel), dark current (e-/pixel/s), shot noise (related to the square root of the photon count), and signal-to-noise ratio (SNR = signal/noise). These parameters quantify the sources and effects of noise, providing a theoretical basis for noise reduction algorithm selection and imaging condition optimization.