As a yardstick for Gaussian functions, divided the brightness of pixels, said Gaussian function which acts on the corresponding area. This is handled separately in different regions of the above form.
Which is the scale for the Gaussian function, the divided pixel luminance region represents the Gaussian function is applied only to its corresponding area. This is different form the above-mentioned regions are processed.
The scale for the Gauss function, as the pixel brightness region division within, said Gauss function only in the role of the corresponding region. Different regions which is the above said process respectively form.