Difference between revisions of "Summer Talks: Discrete Cosine Transform"

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Summer Talks: Discrete Cosine Transform
Name Summer Talks: Discrete Cosine Transform
Location De Punt, Frans de Wollantstraat 84, 1018 SC Amsterdam
Date 2015/08/07
Time 21:30-22:00
PeopleOrganisations Rosa Menkman
Type HDSA2015
Web Yes
Print Yes

A performative lecture by Rosa Menkman

Discrete Cosine Transform - Rosa Menkman HDSA2015

The legibility of an encrypted message does not just depend on the complexity of the encryption algorithm, but also on the placement of the data of the message. The Discreet Cosine Transform is a mathematical technique. In the case of the JPEG compression, a DCT is used to describe a finite set of patterns, called macroblocks, that could be described as the 64 characters making up the JPEG image, adding lumo and chroma values as ‘intonation’. Menkman will navigate a world made of of JPEG DCTs. The encrypted message, hidden on the surface of the image is only legible by the ones in the know.