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8.3. A Brief Look at Some Advanced Ideas in Computer Vision 191
correction problem involves two image spaces. These are the distorted space
and the corrected space of the image. The goal is to derive a m ethod for
transforming the distorted image into a corrected image.
The approach taken to correct for distortion involves a test grid similar to
that shown in Figure 8.6(a). Figure 8.6(b) illustrates the original test pattern
after imaging. It is evident that distortion is present and needs to be corrected.
All the previously straight rows and columns have become curved towards the
center of the image. This is typical of barrel distortion,