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Table 1 Table showing the difference of texture features (contour analysis) 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

Histogram features Image group Feature value (median, interquartile range) Difference with original (x1) image % p
PPC1 Zoomed 37.53, 26.67–55.60   
  Unzoomed 34.89, 24.33–54.30 -7.04 0.094
  BLI 32.56, 25.02–51.56 -13.24 0.286
  BLC 37.68, 22.87–56.12 0.41 0.948
PPC2 Zoomed 24.32, 19.87–29.12   
  Unzoomed 25.03, 19.51–28.74 2.90 0.616
  BLI 25.37, 18.90–30.84 4.31 0.616
  BLC 25.19, 20.28–28.80 3.59 0.528
PPC3 Zoomed 14.87, 11.07–19.77   
  Unzoomed 16.98, 11.37–20.84 14.16 0.071
  BLI 16.93, 11.75–20.01 13.82 0.267
  BLC 16.08, 10.64–20.15 8.09 0.983
PPC4 Zoomed 7.86, 6.33–13.21   
  Unzoomed 8.53, 6.56–13.28 8.48 0.157
  BLI 8.22, 6.11–12.83 4.56 0.5
  BLC 7.56, 5.61–13.57 -3.84 0.231
PPC5 Zoomed 4.30, 2.93–8.25   
  Unzoomed 4.24, 3.60–7.18 -1.32 0.372
  BLI 4.21, 2.56–7.39 -2.08 0.879
  BLC 4.46, 2.28–7.34 3.90 0.372
PPC6 Zoomed 2.45, 0.92–5.35   
  Unzoomed 2.19, 1.41–5.45 -10.65 0.616
  BLI 2.39, 0.71–5.09 -2.26 0.586
  BLC 2.30, 0.78–4.48 -5.86 0.102
PPC7 Zoomed 1.15, 0.16–2.91   
  Unzoomed 1.11, 0.36–2.53 -3.73 0.687
  BLI 1.00, 0.29–2.55 -13.10 0.266
  BLC 1.04, 0.18–2.37 -9.46 0.586
PPC8 Zoomed 0.356, 0.000–1.341   
  Unzoomed 0.494, 0.000–1.427 38.94 0.638
  BLI 0.366, 0.009–1.435 2.77 0.47
  BLC 0.346, 0.000–1.284 -2.77 0.638
PPC9 Zoomed 0.007, 0.000–0.632   
  Unzoomed 0.043, 0.000–0.630 526.85 0.79
  BLI 0.003, 0.000–0.622 -61.12 0.441
  BLC 0.010, 0.000–0.611 43.62 0.333
PPC10 Zoomed 0, 0–0   
  Unzoomed 0, 0–0 N/A 0.465
  BLI 0, 0–0 N/A 0.715
  BLC 0, 0–0 N/A 0.273