Abstract: An edge detection apparatus and method includes a mapping part to map a two-dimensional plane of an input image into a three-dimensional vector surface, a coefficient calculation part to calculate coefficients for an equation of planes each formed with plural pixels and mapped by the mapping part, an angle calculation part to calculate an angle formed by a normal vector with respect to the equation of planes, and an edge decision part to determine whether an edge exists based on the angle calculated by the angle calculation part. Accordingly, the edge detection apparatus can not only efficiently detect edges without sensitivity to noise over high frequency bands, but also adaptively perform edge detections depending on the extent of noise so as to provide diverse adjustment points for the edge detections.