help > Unable to Change Overlay Color
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Jan 27, 2022 08:01 PM | Sophia Martin
Unable to Change Overlay Color
I have a series of overlays I want to display, each with a
different color. When I uplaod them with the gl.overlayload('')
command, they all appear dark blue even though the overlays all
have different color labels. Furthermore, the color labels are
greyed out so I am unable to change the color. I am a new MRIcroGL
user and any assistance would be helpful
- Sophia
- Sophia
Jan 27, 2022 09:01 PM | Chris Rorden
RE: Unable to Change Overlay Color
When the color selection is disabled, it suggests that MRIcroGL
believes this is a labelled atlas where continuous colors are not
meaningful. You can click on the "Options" pulldown menu next to
the color selection and choose 'Show Header". I assume the
"Statistics" tab indicates the Intention is "Label". Perhaps you
can determine why your statistical maps claim to be labels and
create images without this intention. Alternatively, assuming your
images are in .nii format (or after decompressing .nii.gz to .nii)
you can use MRIcroGL to change the intention from "Labels" to "Not
statistics" and choose "Save header" from the File menu to rewrite
the header. Reloading the image should restore the color selection
pull down.
Feb 10, 2022 11:02 PM | Sophia Martin
RE: Unable to Change Overlay Color
Hi Chris,
Thank you for your help. I was able to create the new headers but I am now running into the problem of those new headers not being able to load into the MRIcroGL software. There was an error message that said they were too small? Do you have any recommendations of how to import the new headers successfully?
Best,
Sophia
Thank you for your help. I was able to create the new headers but I am now running into the problem of those new headers not being able to load into the MRIcroGL software. There was an error message that said they were too small? Do you have any recommendations of how to import the new headers successfully?
Best,
Sophia
Feb 12, 2022 12:02 PM | Chris Rorden
RE: Unable to Change Overlay Color
You do not want to create new headers - headers are tiny bits of
data that describe an image. You want to overwrite the header of an
existing image.
-c
-c