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11:54 AM | January 14, 2013
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Perceptual hash functions are designated hash functions for multimedia contents. Similar to cryptographic hash functions, they are required to generate different hash values for different inputs. However, here the definition of difference is changed from bitwise difference to perceptual difference. In other words, cryptographic hash functions generate a totally different hash value even if the input is changed by a single bit, while robust hash functions are expected to change the hash value […]

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