The X-Ray Transform Projection of 3D Mother Wavelet Function

Table 1

The computational cost of the three methods (wheel hub).

Method	3D wavelet	Mallat’s wavelet	2D X-ray transformation projection
Computational cost (s)	1.64	0.43	0.74

Note: computational cost is measured in seconds for processing a 452×452 image. Every data in the table above is the average of all slice experiments.