1. A target detecting method for detecting a target from an input image from a camera, comprising the steps of: a) obtaining camera movement parameters from a movement area in an input image from the camera, and correcting an image frame using the obtained movement parameters; b) extracting movement candidate areas from the input image frame and a previously input image frame; c) extracting image feature information from the input image; and d) extracting a target shape based on the movement candidate areas and the image feature information.