problem using distance map

[Eric BADEL]

Hi,
In  a cellular material, I need to measure the cell wall thickness. I
work with a binary image (LUT inverted) after thresholding. The Distance
Map fuction is perfect.  But I do not want a result in pixel s but a
result in mm. I applied the scale but when I perform the distance map
function, the result is always in pixels.

Eric