Legacy ImageMagick Discussions Archive

Hi, I've discovered something strange. The documentation reads: Unary operators have a lower priority than binary operators, that is, the unary minus (negation) has lower precedence than exponentiation, so -3^2 is interpreted as -(3^2) = -9. Use parentheses to clarify your intent (e.g. (-3)^2 = 9 ...

I can't believe I havn't seen it before. There is a very vicious bug in IM. In old Imagemagick versions the expression below is working OK, in spite the fact the is one extra parenthesis: .... %%[fx: log(maxima.b/minima.b)/log(maxima.r/minima.r))] ... In newer versions the expression is yelding ...

Hello, I'm new here and I hope I can get some help. I'm using ImageMagick on regular basis in my scanning workflow to automate turning the C-41 negative with orange mask (in linear TIFF file) into the positive image. I'm very happy with it, however the script stopped working with newest IM versions ...