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Table 6 Table showing the difference of Fourier features in zoomed images and those without zoom. The latter were subsequently resampled to equalise their resolution (pixels/cm) 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

Fourier feature Magnification Feature value (median, interquartile range) Difference with original (x1) image % p
Radial sum Zoomed 2,881.53, 2,633.78–3,408.98   
  Unzoomed 2,316.44, 2,011.57–2,730.38 -19.61 <0.001
  BLI 3,006.34, 2,464.29–3,358.66 4.33 0.983
  BLC 2,818.77, 2,357.42–3,324.80 -2.18 0.679
Angular sum Zoomed 2,547.76, 2,081.04–3,041.93   
  Unzoomed 1,883.20, 1,599.28–2,428.14 -26.08 <0.001
  BLI 2,406.81, 1,964.50–2,908.85 -5.53 0.231
  BLC 2,404.97, 1,995.90–2,667.91 -5.60 0.248