Hi Brian,
You're right, the display contrast and brightness don't actually impact the segmentation; it's just for visualization purposes. Cheers! Ev On Tue, 13 Aug 2002, Brian C. Schweinsburg wrote: > Thanks. I overlooked the aux adustment for some reason. The environment > variable would be nice because my contrasts are off for every participant, > to varying extents. I suspect that the display contrast and brightness do > not impact the segmentation, etc. Although, I would like to confirm this. > > brian > > > ----- Original Message ----- > From: "Evelina Busa" <[EMAIL PROTECTED]> > To: "freesurfer" <[EMAIL PROTECTED]> > Sent: Tuesday, August 13, 2002 9:39 AM > Subject: Re: contrast and brightness > > > > > > Hi Brian > > > > The tkmedit View--> Configure Brightness Contrast option allows you to > > configure the main and/or aux volume(s) to your liking. I suppose you > > could set an environment variable once you determine to which degree you > > want the aux volume brightness reduced -- assuming this would be the same > > for all the subjects in your study. Would this be the case, necessarily? > > > > > > On Tue, 13 Aug 2002, Brian C. Schweinsburg wrote: > > > > > Hi Folks, > > > > > > When I convert and load images (from gelx, analyze, or brik format), the > contrast and brightness are way off. In some cases the entire brain looks > bright white. This creates a problem for segmentation edits because when I > adjust the contrast for the auxiliary image (mri/orig) the main volume > (segmentation) is adjusted, and actually disappears. What could be causing > my images to be loaded with poor contrast/brightness? Is it a scaling > problem? Is there a way to automatically adjust for this, say, using an > environment variable? > > > > > > thanks for any help. > > > > > > brian > > > > > > > > > > > > ************************ > > > Brian C. Schweinsburg > > > UCSD > > > Phone: 858.642.3736 > > > Fax: 858.552.7432 > > > > > > > > > > -- > > Evelina > > > > > -- Evelina
