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Message-ID:  <000401c1f114$45d966c0$7d3a3b80@kurt>
Date:         Wed, 1 May 2002 09:29:50 -0400
Reply-To:     ImageJ Interest Group <[log in to unmask]>
Sender:       ImageJ Interest Group <[log in to unmask]>
From:         Kurt De Vos <[log in to unmask]>
Subject:      Re: converting RGB stacks to 8 bit color
In-Reply-To:  <[log in to unmask]>

Hi,

I understand.
I also made a similar plugin as you are posting here, and that method
works fine.
Just a line on why I actually want to convert these stacks to 8bit as it
might be of interest for others:
Powerpoint seems to import movie files made with the avi writer plugin
only when the original stack is 8bit, and causes a crash when the
originating stack was RGB.

Thanks for the help.

Kurt


> -----Original Message-----
> From: ImageJ Interest Group [mailto:[log in to unmask]] On
> Behalf Of Wayne Rasband
> Sent: April 30, 2002 23:26
> To: [log in to unmask]
> Subject: Re: converting RGB stacks to 8 bit color
>
>
> >Would it also be possible  to extract the lut I get from the first
> >image and apply that to all the images (since they don't
> vary to much
> >this is probably OK) and then make a stack?
>
> This wouldn't be easy. For each pixel in each image you would
> have to find which of the 256 colors in the LUT is the
> closest color match.
>
> Here is a plugin that uses the method suggested by Greg Joss.
> It converts the RGB stack to a montage, converts the montage
> to 8-bit color, then convertes the montage back to a stack.
>
> -wayne
>

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