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 |