Posted by
Barthel, Kai Uwe on
May 14, 2008; 2:24pm
URL: http://imagej.273.s1.nabble.com/Filtering-certain-color-range-tp3696226p3696229.html
Hello,
you can try different color spaces and segmentation approaches with
the "3D Color Inspector" plugin
http://rsb.info.nih.gov/ij/plugins/color-inspector.htmlTake a small copy of your image, open it with the plugin and then
select any segmentation mode.
You can change the segmentation by changing the depth slider and by
rotating the color space. Try different color spaces to find out which
approach might be the best.
Kai
Am 13.05.2008 um 04:36 schrieb rasheed:
> Hi there everyone,
>
> I would like to know if it is possible to subtract or filter a
> certain color
> range. I have attached a photograph of a core(acquired while
> drilling the
> hole looking for oil). From the image, three different major
> features (in
> terms of color) can be seen, light brown, dark brown and gray.
>
>
http://www.nabble.com/file/p17182225/2010.00-2020.00%2Bm.jpg> 2010.00-2020.00+m.jpg .
>
> What I would like to do is to know the total height of the
> sand(light and
> dark brown) in the image removing the gray stuff which is shale/clay.
> Therefore, if I could filter the gray stuff out, I can then plot a
> profile,
> knowing that the low value(or black) is the shale/clay and the rest
> is sand.
>
> The problem I have now is, when I plot a gray scale profile, it will
> not be
> possible to differentiate the shale from sand as the shale seem to be
> brighter than the dark brown sand.
>
> Any advice on this matter is very much appreciated. Thanks guys/gals.
> --