image detail enhancement method and apparatus is disclosed. Detail enhancement method of the image detail enhancement device comprising the steps of: calculating a first-order differential value and second-order differential value of the input image , using the calculated first-order differential value and second-order differential value is determined and the flat area , the flat area is determined by the area of the first-order differential value and the second step of measuring the flatness according to the size of the differential value , and the measured flatness and a step of adjusting the gain in response to a detail enhancement . As a result , the image quality degradation may not only reduce the incidence of noise is effectively suppressed thereby improving the clarity of the image .
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