Wavelet Compression/Reconstruction and Visualization of Pulmonary X-Ray Images for Achieving of Asbestosis Infected Patients Data - Visual Computing: Scientific Visualization and Imaging Systems - page 126

Fig. 6.10 Emphasized
desired tones with different
color
Fig. 6.11 Image compressed
and reconstructed by
commercial software [ 27 ]
• Radiologically verified results are obtained with CR = 24 for commercial
software. The obtained size of the output file is around 190 KB. For the same
level of decomposition, output files have size of around 37 KB in the proposed
algorithm. However, output files have size of merely 4 KB at the 14th level of
decomposition (medically verified).
• Maximal CR obtained by commercial software is 400, but such images are not
medically verified. However, proposed algorithm is verified medically by three
independent radiologists, as requested by ILO [ 28 ]. Obtained CR is 1,316 with
medical value.
X-rays of 215 patients were analyzed. Algorithm was tested with biorthogonal
wavelets, symlets, Daubichies, and reverse biorthogonal wavelets. Our research
shows that wavelets of lower orders (less vanishing moments) compress images