Skip to main content

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