Image processing method and device

The invention discloses an image processing method and device, and the method comprises the steps: obtaining a video code stream which comprises a first frame of image, a second frame of image and a third frame of image which are adjacent in time sequence; decoding the video code stream to obtain a first alignment frame, a second alignment frame and at least one residual error among the first frame image, the second frame image and the third frame image; generating at least one residual frame according to the at least one residual; and according to the at least one residual frame, the first alignment frame and the second alignment frame, carrying out super-division on the second frame of image to obtain a super-divided second frame of image. Tthe alignment frame and the residual frame areused as the input of the neural network, the residual frame outputs the high-frequency information after passing through the neural network, and the high-frequency information is attached to the brightness channel, so that th