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See application file for complete search history.(57) ABSTRACT (56) References Cited A digital image processing method for locating faces in a digital color image includes the steps of generating a mean US PATENT DOCUMENTS grid pattern element (MGPe) image from a plurality of 5.430, 809 A 7, 1995 Tomitaka sample face images; generating an integral image from the 5,629,752 A 5/1997 Kinjo digital color image; and locating faces in the color digital 5,835,616 A 11/1998 Lobo et al. image by using the integral image to perform a correlation 5,982,912 A 11/1999 Fukui et al. between the mean grid pattern element (MGPe) image and 6.421, 463 B1* 7/2002 Poggio et al............... 382/224 the digital color image at a plurality of effective resolutions 6,940,545 B1* 9/2005 Ray et al.......... 348/222.1 by reducing the digital color image to grid pattern element 2001/0036298 A1* 11/2001 Yamada et al.............. 382/118 …