What is JPEG?
Modified on 2010/05/07 10:02 by Administrator — Categorized as: Digital Image Processing
What is JPEG?
The JPEG (Joint Photographic Experts Group) committee, formed in 1986, has been chartered with the
“ Digital compression and coding g p g of continuoustone still images”
Joint between ISO and ITU-T
Has developed standards for the compression of lossy, lossless, and nearly lossless of still images in the past decade
Website :
www.jpeg.org
JPEG-KOREA-forum :
www.jpeg.or.kr
Baseline JPEG
DCT-based encoder simplified diagram
DCT-based decoder simplified diagram
Baseline JPEG (DCT)
Discrete Cosine Transform
Baseline JPEG (Quantization)
Zigzag scan
DC element (average intensity of spatial block): DPCM (Differential Pulse Code Modulation)
AC element: RLC (Run Length coding): (run, value) with EOB