Figure 6
From: Microarray image analysis: background estimation using quantile and morphological filters
Morphological background as a function of structuring element size. The mean of Spot's morph.close.open (δ B ε B ,δ b ) as a function of k scale taken over all 7680 spots in the red channel on Slide 1. The size of the structuring element B is (kscales r × kscales c ) and the size of B' is (kscale(s r - 2) × kscale(s c - 2)), where s r and s c are the spot-separating distances by row and column, respectively. The default value kscale = 2.5 was used, which for Slide 1 to 4 gives a structuring element (B) of size 62 × 62.