An image processing circuit includes a plurality of memories for storing line pixels of a frame constituting an image, a specific pixel detecting unit for obtaining a luminance difference value, detecting a first minimum pixel (1), detecting a second minimum pixel (1), and detecting a second minimum pixel (2) and a pixel interpolating unit for applying filter coefficients to the observation pixel and specific pixels, obtaining a total sum of results of applying each filter coefficient to each pixel, and dividing the total sum by a total sum of filter coefficients of N×N pixels to obtain an interpolated value for the observation pixel.