The skin color region classifier saves the largest segmentation
area in each given skin color region as the maximum face window.
While the basic sliding window scans over the entire image, the size
of the subwindow increases. In this study, the maximum size of the
subwindow is increased only up to the maximum face window in
expectation of speed improvement. The flow diagram of the sliding
window to which the maximum face window is applied is presented
in Fig. 9(b), while the algorithm is presented in Fig. 8. Finally, the result of face detection over the original image in Fig. 3(a) is presented
as a red rectangle in Fig. 10. Since this study focuses on reducing false
positive rates and improving the speed with the existing detection
rates maintained, the face detection rates are similar to those of the
existing face detector