中文说明：现实中的数字图像在数字化和传输过程中常受到成像设备与外部环境噪声干扰等影响，称为含噪图像或噪声图像。减少数字图像中噪声的过程称为图像去噪。噪声是图象干扰的重要原因。一幅图象在实际应用中可能存在各种各样的噪声,这些噪声可能在传输中产生,也可能在量化等处理中产生。
English Description：
Reality of digital images in digital imaging and transmission equipment with external environmental effects such as noise, known as noise, or noise images. Reducing noise in digital image process is called image noise reduction. Noise is an important cause of image interference. An image may exist in the practical application of all kinds of noise, the noise can be generated in the transport, may also be produced in the quantification process.