Re: converting colors

Posted by Michael Schmid on May 08, 2014; 4:40pm
URL: http://imagej.273.s1.nabble.com/converting-colors-tp5007615p5007635.html

Hi Sharmon,

ImageJ has a built-in Wand tool (8th from left in the tool bar), but this has a few restrictions:
- It can select only one area at a time
- It only traces the outline, any inner holes are selected with the object.
-Note that you should set the options by double clicking the tool. The default mode, 'Legacy', may be unreliable in some cases.

There is a plugin called Versatile Wand; it gives you more options:

http://imagejdocu.tudor.lu/doku.php?id=plugin:segmentation:versatile_wand:start


Michael
________________________________________________________________
On May 8, 2014, at 16:20, Sharmon Lebby wrote:

> Hi Jacqui,
> Thanks for the advice. I've tried these and find I'm not 100% sure how to go about these options.  I also can't find the "Magic Wand" is this a plugin?
>
> Sharmon Lebby
> Research Assistant
> University of Texas San Antonio
>
> On May 7, 2014, at 5:20 PM, Jacqui Ross wrote:
>
> Hi Sharmon,
>
> You could use the Magic Wand to select the white foreground and then fill the selection with red (Edit fill) by changing the Foreground colour in the colour palette.
>
> I'm assuming that your background is all the same grey value, i.e. white and that you want a solid red foreground.
>
> Otherwise, you might be better to make the image greyscale and then use/create a Look Up Table.
>
> Kind regards,
>
> Jacqui
>
> Jacqueline Ross
> Biomedical Imaging Microscopist
> Biomedical Imaging Research Unit
> School of Medical Sciences
> Faculty of Medical & Health Sciences
> The University of Auckland
> Private Bag 92019
> Auckland 1142, NEW ZEALAND
>
> Tel: [phone]
> Fax: [phone]
>
> http://www.fmhs.auckland.ac.nz/sms/biru/
>
>
> -----Original Message-----
> From: ImageJ Interest Group [mailto:[hidden email]] On Behalf Of Sharmon Lebby
> Sent: Thursday, 8 May 2014 5:13 a.m.
> To: [hidden email]
> Subject: converting colors
>
> Hi,
> I have an image that currently has a black background and red foreground.  What I want is a white background with a red foreground for easier viewing in a presentation. I'm wondering if this is something that can be accomplished in ImageJ.  I've tried importing an .ims file as a hyperstack using custom coloring (white foreground, black background) and then inverting the image but is there a way to then change the foreground to red?
>
>
> Sharmon Lebby
> Research Assistant
> University of Texas San Antonio
>
>
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