Image noise reduction method and device, computer equipment and medium

The embodiment of the invention belongs to the technical field of computer graphics, and relates to an image noise reduction method and device, computer equipment and a medium thereof.The method comprises the steps that a rendering video stream is obtained, the rendering video stream comprises multiple frames of rendering images, and each frame of rendering image comprises multiple pieces of layer information; and performing noise reduction synthesis processing on each image layer information in each frame of rendered image to obtain a pre-noise-reduced rendered image, obtaining a target rendered image, an adjacent frame of rendered image of the target rendered image and a target object existing in the target rendered image and the adjacent frame of rendered image from the pre-noise-reduced rendered image, and according to the position of the target object, obtaining the target rendered image according to the position of the target object. According to the method, the color value of the pixel point of the tar