Fig. 13From: Standardizing HER2 immunohistochemistry assessment: calibration of color and intensity variation in whole slide imaging caused by staining and scanningComparison of tissue images. a and b Scanner A and B before (upper) and after (lower) calibration; c Superimposed image of dE* map in magenta and scanner B. Green arrows indicate that dE* is large due to the difference of spatial frequencies between scannersBack to article page