There are many noise reduction algorithms in image processing.Mehdi Mafi, Harold Martin, Jean Andrian, Armando Barreto, Mercedes Cabrerizo, Malek Adjouadi, "A Comprehensive Survey on Impulse and Gaussian Denoising Filters for Digital Images", Signal Processing, vol. 157, pp. 236–260, 2019. In selecting a noise reduction algorithm, one must weigh several factors:
