FINAL REPORT
DCT
Transform
Haar Wavelet
Transform
quantization
methods
results
conclusions
RESULTS
Both the DCT and Haar Wavelet codes were run several times using
various quantization schemes and parameters. Some of the MSE (mean squared error)
and PSNR (peak signal to noise ratio) information obtained from these runs is included in
tables below. The compression information for the binary files resulting from these
tests is also included. The quality of the results can be seen in the accompanying
images.
DCT Results
Quantitative Analysis
Image file: KGirl.256
| # of bits | MSE | PSNR |
| 8 | 574.6263 | 20.5369 |
| 16 | 221.2136 | 24.2827 |
| 24 | 79.5294 | 29.1255 |
| 32 | 3.5922 | 42.5771 |
Compression Analysis
| # of bits | Compressed (gzip) | Ratio |
| 8 | 2177 | 30.1:1 |
| 16 | 8865 | 7.4:1 |
| 24 | 16640 | 3.9:1 |
| 32 | 24941 | 2.6:1 |
DCT Transform Images
8 bit quantization ; 24 bit quantization
32 bit quantization
Haar Wavelet Results
Quantitative Analysis (Levels: 4)
| Method | Image File | # of bits | MSE | PSNR |
| Uniform | KGirl.256 | 4 | 99.36 | 28.16 |
| Adaptive | KGirl.256 | 8,6,4,2,0 | 124.21 | 27.19 |
| Statistical | KGirl.256 | 8,6,4,2,0 | 60.19 | 35.73 |
| Adaptive | Baby.256 | 8,6,4,2,0 | 182.76 | 25.51 |
| Adaptive | Building.256 | 8,6,4,2,0 | 84.75 | 28.85 |
Compression Analysis (Levels: 4)
| Method | Image File | # of bits | Compressed (gzip) | Ratio |
| Uniform | KGirl.256 | 4 | 32768 | 7:1 |
| Adaptive | KGirl.256 | 8,6,4,2,0 | 5440 | 33.7:1 |
| Statictical | KGirl.256 | 8,6,4,2,0 | 5440 | 35.1:1 |
| Adaptive | Baby.256 | 8,6,4,2,0 | 5440 | 39.5:1 |
| Adaptive | Building.256 | 8,6,4,2,0 | 5440 | 33.6:1 |
Haar Transform Images
Uniform Quantization, Levels: 4, Bits: 4
Adaptive Quantization, Levels: 4, Bits: [8 6 4 2 0]
Statistical Quantization, Levels: 4, Bits: [8 6 4 2 0]
Contact the authors:
nofences@rice.edu
heidit@caam.rice.edu
hard@rice.edu
bwang@rice.edu