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Table 3 Table showing the difference of first order statistics in zoomed images and those without zoom. The latter were subsequently resampled to equalise their resolution (pixels/mm) with the corresponding zoomed ones, by using bilinear (BLI) or bicubic (BCI) interpolation. Percent difference with zoomed image are also shown. Statistically significant differences are highlighted.

From: Effect of zooming on texture features of ultrasonic images

First order statistic

Magnification

Feature value (median, interquartile range)

Difference with original (x1) image %

p

Mean value

Zoomed

43.67, 33.23–59.62

  
 

Unzoomed

44.60, 34.06–60.07

2.12

0.145

 

BLI

45.43, 33.98–58.29

4.03

0.5

 

BLC

43.32, 33.51–58.38

-0.80

0.472

Variance

Zoomed

1,287.35, 800.78–2,083.38

  
 

Unzoomed

1,294.56, 1,054.95–2,111.79

0.56

0.349

 

BLI

1,334.25, 831.38–2,082.33

3.64

0.616

 

BLC

1,264.28, 852.92–2,058.30

-1.79

0.396

Median value

Zoomed

34.35, 20.73–48.31

  
 

Unzoomed

37.41, 22.67–49.98

8.90

0.043

 

BLI

38.65, 24.26–48.22

12.51

0.349

 

BLC

35.09, 21.55–50.40

2.16

0.913

Mode

Zoomed

8.00, 0.00–40.25

  
 

Unzoomed

3.50, 0.00–36.75

-56.25

0.341

 

BLI

2.00, 0.00–31.00

-75.00

0.282

 

BLC

1.00, 0.00–23.25

-87.50

0.137

Skewness

Zoomed

1.247, 0.728–1.520

  
 

Unzoomed

1.201, 0.827–1.478

-3.72

0.616

 

BLI

1.188, 0.847–1.460

-4.76

0.879

 

BLC

1.240, 0.812–1.484

-0.58

0.913

Energy

Zoomed

0.014, 0.011–0.027

  
 

Unzoomed

0.014, 0.011–0.024

-2.23

0.811

 

BLI

0.0109, 0.0084–0.0173

-22.13

<0.001

 

BLC

0.0115, 0.0089–0.0214

-17.45

0.016

Entropy

Zoomed

4.51, 4.15–4.71

  
 

Unzoomed

4.52, 4.19–4.72

0.33

0.879

 

BLI

4.70, 4.48–4.98

4.24

<0.001

 

BLC

4.68, 4.36–4.87

3.80

<0.001

Kurtosis

Zoomed

2.06, 1.71–2.49

  
 

Unzoomed

2.15, 1.76–2.47

4.49

0.025

 

BLI

1.73, 1.71–1.81

-15.72

0.006

 

BLC

1.76, 1.72–1.95

-14.37

0.01