Figure 5

Figure 5

Detail, 7 mm transaxial slice CT scan of abdomen shown in Figure 2, before and after compression using JPEG with DCT algorithm.

Image detail is preserved even at a compression ratio as high as 22:1.

   

   
   
A:  Original image, losslessly compressed.     
   
   
B:  QF =  100,  compression ratio = 1.6:1.
   
   
C:  QF =  3.2,  compression ratio =   8:1.
   
   
D:  QF =  1.0,  compression ratio =  22:1.
   
   
E:  QF =  0.5,  compression ratio =  35:1.
   
   
F:  QF =  0.1,  compression ratio =  67:1.
   
   

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