A sharpness enhancing apparatus, comprising: an edge analyzing unit configured to receive image data separated into brightness signals and color signals, and analyze an edge state by using brightness signals and color signals of cells contained in a specific area; a sharpness correcting unit configured to calculate a sharpness correction amount by performing a one-to-one mask operation on a selected sharpen mask according to the analysed edge state and the brightness signals of the cells inputted from the edge analyzing unit, sum the calculated sharpness correction amount and the brightness signals of the cells, and correct the sharpness of the brightness signals of the cells, wherein the sharpness correcting unit comprises: a sharpen mask selecting unit configured to select a sharpen mask set according to the edge state; a sharpness correction amount calculating unit configured to calculate a sharpness correction amount for the brightness signals of the cells by performing a one-to-one mask operation on the selected sharpen mask and the brightness signals of the cells; an initial weight assigning unit configured to assign an initial weight to the sharpness correction amount; a user weight assigning unit configured to set the sharpness correction amount, to which the initial weight is assigned, as a sharpness reference value, and assign a user weight to the sharpness reference value according to the sharpness reference value; a selecting unit configured to select one of the sharpness reference value and the sharpness reference value to which the user weight is assigned; and a summing unit configured to sum the sharpness reference value selected by the selecting unit and the brightness signal of the cells. an edge analyzing unit configured to receive image data separated into brightness signals and color signals, and analyze an edge state by using brightness signals and color signals of cells contained in a specific area; a sharpness correcting unit configured to calculate a sharpness correction amount by performing a one-to-one mask operation on a selected sharpen mask according to the analysed edge state and the brightness signals of the cells inputted from the edge analyzing unit, sum the calculated sharpness correction amount and the brightness signals of the cells, and correct the sharpness of the brightness signals of the cells, wherein the sharpness correcting unit comprises: a sharpen mask selecting unit configured to select a sharpen mask set according to the edge state; a sharpness correction amount calculating unit configured to calculate a sharpness correction amount for the brightness signals of the cells by performing a one-to-one mask operation on the selected sharpen mask and the brightness signals of the cells; an initial weight assigning unit configured to assign an initial weight to the sharpness correction amount; a user weight assigning unit configured to set the sharpness correction amount, to which the initial weight is assigned, as a sharpness reference value, and assign a user weight to the sharpness reference value according to the sharpness reference value; a selecting unit configured to select one of the sharpness reference value and the sharpness reference value to which the user weight is assigned; and a summing unit configured to sum the sharpness reference value selected by the selecting unit and the brightness signal of the cells. a sharpen mask selecting unit configured to select a sharpen mask set according to the edge state; a sharpness correction amount calculating unit configured to calculate a sharpness correction amount for the brightness signals of the cells by performing a one-to-one mask operation on the selected sharpen mask and the brightness signals of the cells; an initial weight assigning unit configured to assign an initial weight to the sharpness correction amount; a user weight assigning unit configured to set the sharpness correction amount, to which the initial weight is assigned, as a sharpness reference value, and assign a user weight to the sharpness reference value according to the sharpness reference value; a selecting unit configured to select one of the sharpness reference value and the sharpness reference value to which the user weight is assigned; and a summing unit configured to sum the sharpness reference value selected by the selecting unit and the brightness signal of the cells.