Image processing apparatuses and methods, image processing systems and training methods

An image processing apparatus, comprising:

• one or more processors;
• and
• one or more memories connected to the one or more processors and having instructions stored thereon, which when executed by the one or more processors, cause the one or more processors to be configured to:
• receive an input image;
• and
• input the input image to K stages of cascaded decoding units, to process the input image to obtain an output image,
• wherein an ith stage of decoding unit receives mK+1−i input images and outputs mK−i output images, a resolution of the output images is greater than a resolution of the input images, and the number of image components of the output images is less than the number of image components of the input images, where K, i and m are positive integers and 1≤i≤K,
• wherein the one or more processors are further configured to:
• receiving an original image and a noise image, and obtain mK images as mK image components of the input image based on the original image and the noise image.