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Message-ID:  <Pine.GSO.4.44.0308090057130.558-100000@clyde>
Date:         Sat, 9 Aug 2003 01:06:08 -0700
Reply-To:     ImageJ Interest Group <[log in to unmask]>
Sender:       ImageJ Interest Group <[log in to unmask]>
From:         "W. Bryan Smith" <[log in to unmask]>
Subject:      gray to RGB and back to gray?

Hi,

Is there a way to assign a new color LUT to an image that has been converted to
RGB?  More specifically, I have an image that was originally an 8-bit grayscale
tiff image.  I applied a LUT, opened the image in Corel draw, converted the
image to RGB for editing, and now I want to convert back to grayscale so I can
apply a different LUT to the image.  I get some weird results when I try this,
and ultimately it looks like the LUT assignment the second time around is based
on the graylevel intensity values of the RGB image, not the original grayscale
image (not surprisingly).  Is there any way to do this, or do I just have to
start over from the original image if I want to change the LUT?

Bryan

Division of Biology
Broad Center
Caltech 114-96
Pasadena, CA, 91125
ph. (626) 395-2140

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
The illusion that we are separate from one another
is an optical delusion of our consciousness.
                                -Albert Einstein
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

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