Re: Smoothing?

I think i'm gonna need a good book on this after all :p

Any sugestions???


"Roger Rowland" <[EMAIL PROTECTED]> wrote in message news:<[EMAIL PROTECTED]>...
> "DaveWilson" <[EMAIL PROTECTED]> wrote in message
> news:[EMAIL PROTECTED]
> > so if that code uses the low pass filter (1 1 1) (1 1 1) (1 1 1)
> > smooths
> > why doesn't (0 1 0) (1 -4 1) (0 1 0) sharpen the image? according to
> > sources i've found that filter applied in the same manner should
> > sharpen an image?
> >
> >
> 
> 
> Except that it isn't applied in the same manner. The scaled result of the
> high-pass filter should be *added back* to the original pixel value at that
> position to sharpen the image. In the previous examples, the output of the
> filter *replaces* the original value.
> 
> 
> ------------------------------------------------------
> EMail: roger dot rowland at rmrsystems dot co dot uk