1. An image processing method, comprising: receiving image content and metadata of the image content, the metadata comprising flag information indicating whether to perform image processing on the image content and image processing information; performing the image processing based on the flag information and the image processing information on an image frame; and outputting the image processed image frame on which the image processing is performed, wherein the image processing information comprises at least one of information for enhancing sharpness of the image content, information for processing noise of the image content, information for enhancing a brightness of the image content, and information for enhancing a color of the image content, wherein the metadata comprises information on frequency characteristics of the image content for enhancing the sharpness of the image content, and wherein the performing the image processing comprises controlling a frequency component and an intensity of an image processing filter based on the frequency characteristics of the image content included in the metadata.