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JPEG Image Compression

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JPEG Image Compression presentation given as part of my Undergrad project.

JPEG Image Compression presentation given as part of my Undergrad project.

Published in Technology , Art & Photos
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  • 1. JPEG Image Compression BITS GC 331 Computer Projets HemanthKumar Mantri 2004S3P7549
  • 2. JPEG Image CompressionJPEG: Joint Photographic Experts Group.JPEG: compression algorithm, NOT a file format. The original JPEG format was JFIF and later SPIFF. Current popular choices include C-Cube JFIF; Adobe TIFF/JPEG.4-step process:1. Transforming RGB to YCbCr, separating intensity from color2. Identifying redundant data using a Discrete Cosine Transformation (DCT)3. Quantizing remaining data4. Encoding the result to minimize storage requirements
  • 3. RGB YCbCr
  • 4. After DCT After Quantisation
  • 5. Regenerated from Bits
  • 6. Inverse Quant. IDCT
  • 7. YCbCr New RGB New
  • 8. Original 37.7 KB Regenerated 29.3 KB Difference
  • 9. Compression performance JPEG: } 10:1 to 20:1 compression without visible loss (effective storage requirement drops to 1-2 bits/pixel) } 30:1 to 50:1 compression with small to moderate visual deterioration } 100:1 compression for low quality applications
  • 10. That’s all AndThank You