Patent Document ID: 9898681
Application ID: 14529767
Patent Status: 1

Claim One:
1. One or more non-transitory storage devices storing instructions that are executable to perform operations comprising: segmenting a full image having w*h pixels into single, double, and quadruple areas, wherein windows having a size of x*y in the full image are overlapped each other in horizontal and vertical directions with predetermined width m and length n, wherein an area of each window having no overlap is the single area, areas of each window having overlaps with neighbor windows in a diagonal direction are the quadruple areas, and areas of each window having overlaps with neighbor windows in vertical and horizontal directions except the quadruple areas are the double areas, wherein a single direction is assigned to each of the windows, and one direction is assigned to the single area, two directions are assigned to the double area, and four directions are assigned to the quadruple area; calculating a single directional integral image for the single area and calculate multi-directional integral images for the double and quadruple areas; and detecting an object pattern area in the full image using the single directional integral image and the multi-directional integral images; wherein each of w and h is one of natural numbers, and each of x and y is one of natural numbers, wherein x and y are smaller than w and h, respectively.