Posted by
ctrueden on
May 25, 2011; 6:30pm
URL: http://imagej.273.s1.nabble.com/How-to-work-with-color-images-tp3684447p3684448.html
Hi Juan,
So, do I have to convert every pixel like that before working with them? Is
> there no API for RGB images? Maybe a method to split the image in three
> different gray scale images and to merge them after being processed, would
> be helpful.
>
There are many different ways of dealing with it. To split into three
different grayscale images first, use a command such as:
IJ.run(imp, "Split Channels", "");
(This is what the macro recorder produces when executing the command Image >
Color > Split Channels.)
But just using the bitmasking code you mentioned is fine too.
Regards,
Curtis
On Wed, May 25, 2011 at 5:09 AM, Juanjo Vega <
[hidden email]> wrote:
> Hello everyone,
>
> I need to work with colour images in a plugin I'm developing, and as it is
> my first time and I'm pretty confused.
>
> I had a look into the "Color Threshold" plugin and found this:
>
> int c, r, g, b;
>
> ...
>
> c=ip.getPixel(x,y);
>
> r = ((c&0xff0000)>>16);//R
> g = ((c&0x00ff00)>>8);//G
> b = ( c&0x0000ff); //B
>
> So, do I have to convert every pixel like that before working with them? Is
> there no API for RGB images? Maybe a method to split the image in three
> different gray scale images and to merge them after being processed, would
> be helpful.
>
> Any help will he welcome, plugins, API reference, etc. :)
>
> Sincerely,
>
> Juanjo.
>
> ------------------------------------------------------------
> Juanjo Vega (
[hidden email])
>
> Unidad de Biocomputación. Laboratorio B-13.
> Centro Nacional de Biotecnología. CNB-CSIC.
> C\ Darwin, 3. Campus de Cantoblanco.
> Universidad Autónoma de Madrid.
> 28049, Madrid, Spain.
>
>
http://www.cnb.csic.es>
http://www.biocomp.cnb.csic.es>
> +34 91 585 4510
>
> "Las mejores almas son capaces de los mayores vicios como de las mayores
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