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Re: RGB Imaging

Posted by Fabrice Senger on Feb 04, 2010; 3:59pm
URL: http://imagej.273.s1.nabble.com/RGB-Imaging-tp3689504p3689508.html

Colin Rickman a écrit :

> Hi
>
> The displayed colour of the individual R, G and B slices is not
> important. The shades of grey you see in the image contain the
> intensity value for the respective channel (R, G or B). If you
> recombined them you would end up back with the original image.
>
> Colin
>
> Dr Colin Rickman
> Department of Chemistry (WP 2.03)
> School of Engineering and Physical Sciences
> Heriot-Watt University
> Edinburgh
> EH14 4AS
>
> Tel: +44 131 4514193 (Office)
> Tel: +44 131 6511512
> Fax: +44 131 6503128
>
>
> On 04/02/2010 15:45, jspecs wrote:
>> Michael,
>>
>>
>>
>> just read the documentation to get a few ideas what could be done:
>>
>> Image>Color>Split Channels
>> Analyze>Histogram for each of the channels
>>
>> or
>>
>> Image>Type>HSB stack
>> Analyze>Histogram for each of the stack slices.
>> Especially the hue slice will be of interest to detect a change of
>> hue (see http://en.wikipedia.org/wiki/HSV_color_space if you are not
>> familiar with HSB)
>>
>>
>> I have tried what you mentioned, but both techniques seem to generate
>> slices/channels with varying shades of black, gray, or white. This
>> makes me
>> think that the histogram will just generate its results based on
>> brightness
>> as opposed to RGB. Am I wrong?
>>
>>
>>
>>    
>
Hi,

I would aswell give a try to the color space converter plugin an not
only work with HSB, maybe Lab would be of interest...
And color spaces are just different ways to depict the data you collected.

Fabrice.