1. A method for contour noise elimination and edge enhancement in an electronic device, the method comprising: determining a Contour Counter (CC) representing a flat degree of each region of an input image and determining a type of each region of the input image; determining a Bit Resolution Enhancement (BRE) parameter and an edge enhancement parameter of each region according to the determined region type; on a basis of the BRE parameter, determining a first weight for each region of the input image and enhancing a bit resolution of the input image; and on a basis of the edge enhancement parameter, determining a second weight for each region of the input image and performing the edge enhancement for the bit-resolution-enhanced image.