1. A method of processing an image, the method comprising: acquiring image detail information by applying a filter to an image; detecting an edge region and a texture region from the image detail information; and correcting the image detail information by dividing the edge region into a plurality of regions and applying different gain values to image signals corresponding to at least two of the plurality of regions, and applying a gain value to an image signal corresponding to the texture region according to a magnitude of the image signal corresponding to the texture region.