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Table 8 Image resampling reduces significantly the variability due to different image resolution. Bicubic interpolation (BCI) was better than bilinear interpolation (BLI), p = 0.036. This was remarkable for those 25 features shown on Wilcoxon analysis to be significantly different, when zoomed and un-zoomed images were compared. Results are shown as median and interquartile range.

From: Effect of zooming on texture features of ultrasonic images

  Percent difference in comparison with unzoomed image
  All textural features (n = 50) Significant textural features (n = 25) Non significant textural features (n = 25)
Zoomed image (Z) 8.2%, 1.8–25.0 18.14%, 4.94–28.43 3.72%, 1.50–9.00
Resampled image (BLI) 4.5%, 2.7–12.0 4.88%, 1.75–11.49 4.31%, 3.24–12.43
Resampled image (BCI) 3.0%, 0.8–6.8 2.79%, 0.66–6.86 3.60%, 1.00–7.44
Group comparison
Z vs BLI 0.112 0.004 0.26
Z vs BCI 0.011 0.006 0.43
BLI vs BCI 0.036 0.35 0.042
  1. # IDM: Inverse difference moment, *IMC-1: Information measure of correlation-1, **IMC-2: Information measure of correlation-2