
Algorithms for Rectification of Geometric Distortions 97
FIGURE 5.2
Gaussian blurred image pyramid, depicting the scale space of an image
The Gaussian convolved images appear blurred in comparison to the original
image simulating the scale-space visualization of the image. The high fre-
quency corresponds to minute image details that are never common between
two different images so these are removed. The blurred images are subse-
quently subtracted from each other to again remove details in two subsequent
blurs. These successive blurred images in each stage of convolution are desig-
nated in Figure 5.3 as B
i
and D
i
. Using maximization rule [33] a pixel ...