Question on PixelMath

[niteman1946]

I'm combining two NB images using PixelMath.  Are the two following operations equivalent?  If not, why?

1.   "image1  +  image2"
2.   "0.5*image1  +  0.5*image2"

I do not see a visual difference between the resultant sum of either of these two statements.

Appreciate your thoughts,

Mark

[Carlos Milovic]

If you keep the "Rescale" option enabled, then both will be the same.

[niteman1946]

Thanks Carlos.

Mark