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Chapter 4:
Visual Metrics: Discriminative Power through Flexibility
Abstract
An important stage in visual processing is the quantification of optical at­tributes of the outside world. We argue that the metrics used for this quan­tification are flexible, and that this flexibility is exploited to optimize the discriminative power of the metrics. We derive mathematical expressions for such optimal metrics and show that they exhibit properties resembling well-known visual phenomena. To conclude, we discuss some of the impli­cations of flexible metrics for visual identification.
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CHAPTER 4
23 PAGES


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