Apparatus and method for extracting feature point based on SIFT and face recognition system using thereof

摘要

The present invention relates to a SIFT-based image recognition technique, a feature point extraction device for SIFT-based according to the present invention, the concentration threshold of the candidate pixel (candidate pixel) that is used for feature extraction in response to the input image (contrast concentration calculation unit that calculates a threshold value threshold); And offer the advantage of including the total candidate pixel portion generates feature point descriptor for generating a feature point descriptor (keypoint descriptor) using the candidate pixels than the concentration threshold, and increasing the number of feature points to be extracted, to improve image recognition rates accordingly The.