Method and System of Person Identification by Facial Image

A computer-based method of comparing an image with a template image, the method comprising:

• deriving a normalized image based on the image;
• splitting the normalized image into rectangular blocks;
• representing the set of rectangular blocks of the normalized image by a DCT (discrete cosine transform);
• calculating a first distance between the normalized image and the template image based on a weighted sum of distances between corresponding blocks from the set of rectangular blocks of the normalized image and a set of rectangular blocks of the template image;
• comparing the first distance to a first predetermined threshold, the first predetermined threshold indicating a degree of similarity between the normalized image and the template;
• responsive to the first distance being greater than the first predetermined threshold, determining a set of overlapping blocks from the normalized image and representing the set of overlapping blocks by the DCT;
• calculating a second distance between the normalized image and the template image based on a weighted sum of distances between corresponding blocks from the set of overlapping blocks of the normalized image a set of overlapping blocks of the template image;
• and
• recognizing the normalized image based on the calculated distances.