Data Processing
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Lecture 10 - Data Compression
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Overview
Graphics
JPEG Compression
Joint Photographic Experts Group
Used to compress images
Compresses groups of pixels
Uses a Discrete Cosine Transformation
DCT
Quantises the results of the DCT
Lossy!
Further compression is applied
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Maintained by Dr Michael J. Watts (
mike.watts.net.nz
).