SmoothMix

• @leeSmoothMixSimpleEffective2020
• mask-based approach
• matching closely with the [Cutout] and [CutMix](Cutout] and [CutMix.md) techniques
• the mask has soft edges with gradually decreasing intensity
• the mixing strategy is the same
• The augmented image has mixed pixel values depending on the strength of the mask
• $\lambda =\frac{{\Sigma }_{i=1}^W{\Sigma }_{j=1}^H{G}_{ij}}{WH}$
• Gij is the pixel value of mask G, H is height, and W is width
• xnew = G.xa + (1 − G).xb
• ynew = λ.ya + (1 − λ).yb