Multiresolution Analysis Using Wavelet, Ridgelet, and Curvelet Transforms for Medical Image Segmentation

Table 2

The error percentages of spheres diameters measurements for NEMA IEC body phantom.

Spheres (mm)	Error % for measured diameters
	10	13	17	22	28	37
K-means [3]	−13.6	−11.5	−5.77	−5.51	−5.1	−5.01
MRFM [3]	−7.41	−8.69	4.28	4.06	3.9	3.89
Clustering [3]	18.6	16.0	9.0	7.5	5.5	1.1
Iterative Thresholding [3]	3.0	3.1	0.6	0.9	1.1	1.8
Wavelet
Haar
Level 1	−2.9	−2.46	1.35	0.82	0.29	0.05
Level 2	−10.9	−6.67	3.88	−1.3	−0.76	−1.95
Level 3	—	—	5.65	−18.2	2.57	−3.24
Daubechies
Level 1	−7.43	−2.69	0.12	2.0	2.17	1.81
Level 2	−5.2	0.15	−4.24	0.73	0.62	−0.11
Ridgelet	−10.93	−6.67	3.88	−1.30	−0.76	−1.95
Curvelet	2.65	1.62	1.07	−0.82	−0.33	−0.09