Bayer image joint demosaicing and denoising method based on guided filtering

The invention discloses a Bayer image joint demosaicing and denoising method based on guided filtering. The method comprises the following steps: carrying out the denoising of a Bayer image, and improving the signal to noise ratio of the Bayer image; and demosaicing is performed on the denoised Bayer image, so that the image quality is improved. According to the method, the image is denoised before demosaicing, color information of the noise-containing Bayer image obtained by the sensor can be well recovered, noise introduced in the image obtaining process of the sensor is effectively restrained, unnatural colors are reduced, and the visual effect of the color image is improved; the method is realized by using simple guided filtering. When an image is processed, operation can be completedonly by caching row data where the filtering window is located, hardware implementation of an assembly line operation structure is facilitated, and real-time processing of the image can be achieved. The real-time requirement