Rendering method and device for improving realism of rendered image

A device for improving realism of a rendered image which is a computing device for visualizing realism of a rendered image, the device comprising:

• at least one processor;
• and
• a memory configured to store instructions executable by the processor,
• wherein the processor receives training image data including a real image, generates a rendering simulation image using the training image data, acquires background feature information by separating foreground and background areas on the basis of the rendering simulation image or the training image data, acquires latent feature information required for generating a realistic image on the basis of the rendering simulation image, and generates a realistic image on the basis of the latent feature information and the background feature information.