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The advantages of producing images by scanning techniques are discussed. It is shown that scanning can result in improvements in resolution and signal-to-noise ratio, and can give a complete three-dimensional data set. Scanning can also result in true space-invariant imaging, and coherent imaging conditions can be achieved without the loss in spatial frequency band width normally associated with coherent imaging.
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Colin J. R. Sheppard (1986) studied this question.
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