1. An apparatus for detecting a low luminance noise, comprising: a median value calculator for calculating a median value using a median filter with respect to pixels in a partial area of an input image; a low luminance noise determiner for determining whether a difference between the median value and each original pixel value of the partial area exceeds a predetermined threshold, counting the number of pixels exceeding the predetermined threshold, and determining based on a degree of dispersion of the low luminance noise whether the input image includes the low luminance noise; and a low luminance noise canceller for executing a low luminance noise cancellation algorithm for the input image only if the input image includes low luminance noise.