Table 2

A comparison of image analysis methods

Yellow channel

nRed channel


Intensity (mean)

% Positive area

Intensity (mean)

% Positive area


Positive color selection (% positive area)

0.96

0.98

0.84

0.98


Values (correlation coefficient, r) indicate strength of a linear relationship between results from positive color selection and Yellow or normalized Red analysis method, where a maximum positive is r = 1.

Pham et al. Diagnostic Pathology 2007 2:8   doi:10.1186/1746-1596-2-8

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