Re: Normalization inverts image???

DOH!
Thanks all sorted now :p


"Roger Cattin" <[EMAIL PROTECTED]> wrote in message news:<[EMAIL PROTECTED]>...
> Exchange max and min:
> 
> pixOut = ((pixIn - min)*((255-0)/(max-min))+0);
> 
> Roger
> 
> "Vexed Puppy" <[EMAIL PROTECTED]> wrote in message
> news:[EMAIL PROTECTED]
> > I'm trying to perform normalization /contrast stretching on a gray
> > scale image.
> > However when applied I get a negative of the image. As i understand to
> > normalize an image i process each pixell using this formula:
> >
> > pixOut = ((pixIn - max)*((255-0)/(min-max))+0);
> >
> > where max is the maximum pixell density (say 235) and min is the
> > minimum (say 25) and the 255 and 0 are representing the complete range
> > of values.
> >
> > I'm going wrong somewhere but not sure where that is :/