Monthly Archives: April 2011

Principal Components and Spin Images

Principal Components and Spin Images are two important concepts used heavily in 2D and 3D image processing. Without going into too much detail, here is the intuitive understanding behind the two concepts. Figure 1: Best fitting ellipsoid (solid line) and worst fitting ellipsoid (dotted line) for a set of 2D vectors. First, principal components are...

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Dynamic Range And Images

What is dynamic range and why is it important in imagery? Dynamic range is a measurement of the ability to record large and small changes simultaneously. When an image has high dynamic range, it means that the image has the ability to display both small and large changes. To keep the discussion simple and clear,...

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