AFNI Message Board

Dear AFNI users-

We are very pleased to announce that the new AFNI Message Board framework is up! Please join us at:

https://discuss.afni.nimh.nih.gov

Existing user accounts have been migrated, so returning users can login by requesting a password reset. New users can create accounts, as well, through a standard account creation process. Please note that these setup emails might initially go to spam folders (esp. for NIH users!), so please check those locations in the beginning.

The current Message Board discussion threads have been migrated to the new framework. The current Message Board will remain visible, but read-only, for a little while.

Sincerely, AFNI HQ

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bob cox
March 18, 2004 06:52PM
You can adjust the grayscale interactively in an AFNI image window using the "c" and "b" (contrast and brightness) arrows at the right edge of the image. Also, in the latest release, you can click-and-hold Button 1 in the image, then drag it around to adjust the contrast and brightness interactively. This method becomes intuitively easy to use after a couple of trials. Finally, the "g" button at the right edge of the image lets you adjust the gamma factor for the grayscale map.

You can see a graph of the mapping between data values and grayscale values by using the Button 3 popup on the intensity bar (just right of the image), and then choosing the option "Display Graymap Plot". This is kind of fun.

If you like bizarreness, you can switch from grayscale to a colorscale with the "Colr" button at the top right corner of the image viewer window.

bob cox

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changing the grayscale

Aimee Nelson & Chris Moore March 18, 2004 06:00PM

Re: changing the grayscale

bob cox March 18, 2004 06:52PM