Try the inverse LUT.  It just gives you a negative image.
What version of IMAQ are you using?  I know NI changed some things going to
IMAQ 2.2.  In IMAQ 2.2 you can set a property node on IMAQ CREATE for
specifying the lookup table.  I am using the 1411 IMAQ card which is a
little bit different from the 1408 IMAQ card.
Robert
Miguel wrote in message <37DFF6DE.77D47380@recol.es>...
>Hi,
>
>In the IMAQ Reference Manual talks about predefinided look-up tables as
>Equalize, Reverse, Square-Root and so on.
>
>However I can't find the Reverse look-up table anywhere.
>
>Does anyone know if it exists?
>
>Thanks to all.
>
>Miguel.
>
>
>