deletions | additions       diff --git a/A_rectangular_area_with_width__.tex b/A_rectangular_area_with_width__.tex  index a1d6a0e..18bb9ae 100644  --- a/A_rectangular_area_with_width__.tex  +++ b/A_rectangular_area_with_width__.tex 
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A rectangular area with width 80 percent of the face rectangle width and height 20 percent of the face rectangle height is obtained, which will be set horizontally as a function of the face orientation, includes in its left and right ends the corresponding ear in any case of the specific orientation. Fig. Figure.  14 illustrates two pictures for those transport that corresponds for the nose and the rectangular area is removed from the face orientation that includes the ears. With the values of the depth image after the preprocessing stages in this rectangular region, the pixels with the lowest and non-null value in the left and right half are extracted. Fig. Figure.  15(a) shows an image with the depth values in this rectangular area. Fig. Figure.  15(b) shows the areas formed by the pixels with the lowest and non-null value in the left half and right half of the area. The centers of mass of these two regions relate with the ears \cite{gonzalez2014kinect}.