Fig. 3
From: Improved wood species identification based on multi-view imagery of the three anatomical planes
Data augmentation procedure. Images from a sample of Afzelia africana. a Original image. Original image divided in two parts (b) and four parts (c). d Original image divided in four parts applying a 2-D Gaussian smoothing kernel with standard deviation of 1 at the second piece, rotating the third piece 90 degrees and adding salt-and-pepper noise with a density of 0.05 to the fourth piece. The original image a has 1000 × 1000 pixels corresponding to 1388.88 × 1388.88 \(\upmu\)m