Calculating the difference of two images (tif)

imagej

#1

Hi everybody!
My friend and i calculated the difference-image of two tif-images (original one and the 8-bit-color-version of it with a smaller size than the original one) and we need to find out, why the resulting picture has a bigger size than the original one. we used the image-calculator-tool, then ‘difference’.
Does anyone know the answer?

Thanks for your help!!


#2

@mi_lli

Would you be able to post your two images so we can try to recreate this issue you are finding? It is still not completely clear to me… ie - when you say ‘smaller’, do you mean dimensionally, as in it is a cropped section of the original, etc?

Sorry - fuzzy brain today!

eta