Table 2.

Summary of three-dimensional transforms computed from the contrast enhanced CT (CECT) images.

Three-dimensional filters and transforms	Number of filters
Laplacian of Gaussian filter	$(\sigma =0.2,0.4,1.5,2.5,5.0)=5\text{filters}$
Gaussian filter	$(\sigma =0.2,0.4,1.5,2.5,5.0)=5\text{filters}$
Three-dimensional Laws’ texture filters	$\text{Window size}3=27\text{filters}$$\text{Window size}5=125\text{filters}$
Three dimensional Haar wavelet transform	Three-level decomposition = 18 filters
Three dimensional Daubechies wavelet transform	Three-level decomposition = 18 filters
Three dimensional symmetrical wavelet transform	Three-level decomposition = 18 filters
Three dimensional Gabor filters	144 filters
Total	360 filters