Sorry, the previous answer was for another question and another person :-) Concerning Your question, I think that gwyddion is quite weak for line correction. When the lines does not match each other, I usually convolve the picture by 1-D Gaussian in direction perpendicular to scanning area. It is quite effective against non-matching lines and it does not hurt the picture too much. However, am not sure if this function is included in Gwyddion. The other thing is that I am working with STM so the frequencies of noise in the images are different. In my case, any linear line correction is useless.
Martin On Wed, 20 Aug 2008 15:57:44 +0900 Martin SETVIN <[EMAIL PROTECTED]> wrote: > Hello. > > There is a button on the main pannel of Gwyddion. It allows you to > choose 3 points in the image and subtract a plane created by those 3 > points. Is it what You need? > > Regards, > Martin > > > On Wed, 20 Aug 2008 08:36:31 +0200 > [EMAIL PROTECTED] wrote: > > > What i mean is not the feature Denis Scaini mentioned. More important than a > > high-order polynomial fit of the whole image is a offset / first order fit > > line by line. But to avoid the influence of high features / steps in this > > levelling, a mask is necessary. > > > > What exactly does "median linecorrection" do? > > > > Regards, Andreas Winkler > > > > -----Ursprüngliche Nachricht----- > > Von: [EMAIL PROTECTED] > > [mailto:[EMAIL PROTECTED] Im Auftrag von David > > Necas (Yeti) > > Gesendet: Dienstag, 19. August 2008 17:09 > > An: Gwyddion use discussion > > Betreff: Re: [Gwyddion-users] How to do Flatten / Line Fit with Mask > > > > On Thu, Aug 14, 2008 at 11:35:39AM +0200, Denis Scaini wrote: > > > > > > In particular, the missing tool is the possibility to do a polynomial > > > leveling of an image excluding an user defined area of it. > > > > I added this possibility. > > > > It might not work for high polynomial degrees (since fitting of plain powers > > is ill-conditioned, and this cannot be easily fixed for a masked, i.e. > > unknown and irregular, domain), but it works for degrees that actually make > > sense to use. > > > > Yeti > > > > > > ------------------------------------------------------------------------- > > This SF.Net email is sponsored by the Moblin Your Move Developer's challenge > > Build the coolest Linux based applications with Moblin SDK & win great > > prizes Grand prize is a trip for two to an Open Source event anywhere in the > > world http://moblin-contest.org/redirect.php?banner_id=100&url=/ > > _______________________________________________ > > Gwyddion-users mailing list > > [email protected] > > https://lists.sourceforge.net/lists/listinfo/gwyddion-users > > > > ------------------------------------------------------------------------- > > This SF.Net email is sponsored by the Moblin Your Move Developer's challenge > > Build the coolest Linux based applications with Moblin SDK & win great > > prizes > > Grand prize is a trip for two to an Open Source event anywhere in the world > > http://moblin-contest.org/redirect.php?banner_id=100&url=/ > > _______________________________________________ > > Gwyddion-users mailing list > > [email protected] > > https://lists.sourceforge.net/lists/listinfo/gwyddion-users > > -- > Martin SETVIN <[EMAIL PROTECTED]> > > > ------------------------------------------------------------------------- > This SF.Net email is sponsored by the Moblin Your Move Developer's challenge > Build the coolest Linux based applications with Moblin SDK & win great prizes > Grand prize is a trip for two to an Open Source event anywhere in the world > http://moblin-contest.org/redirect.php?banner_id=100&url=/ > _______________________________________________ > Gwyddion-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/gwyddion-users -- Martin SETVIN <[EMAIL PROTECTED]> ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ Gwyddion-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/gwyddion-users
