Abstract
This chapter describes one way of recovering depth information from a sequence of grey-scale images. This technique, called the Intensity Gradient Analysis (IGA) algorithm, is based on the ideas presented in the previous chapter. As one might well infer, IGA uses intensity gradients to determine when a fixed image displacement occurs. Since the IGA algorithm assumes knowledge of camera motion, when a fixed image displacement is perceived, all the parameters needed to determine depth are known.
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