recently I installed ImageJ on my computer to quantify certain colours for
my histological analization. Unfortunately, the item “Colour threshold
(Image>Adjust>Colour threshold” isn’t working. In my case the colour
spectrums in the boxes are missing. Do I need to install any Plugin for this
purpose? If yes, which one? For a better understanding of my problem I uploaded the following picture:
Thank you in advance for your support.