An improved practical method of quantitative Kerr microscopy is demons
trated. While in the original approach the sample was saturated to obt
ain a calibration of the Kerr contrast, the calibration is now derived
by assigning interactively the magnetization direction to regions of
the image for which it is obvious. Then the rest of the image is accor
dingly evaluated. Therefore only two complementary domain images are n
eeded for quantitative magnetic microscopy.