Manage Color Histogram value

[sonemy]

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[sonemy]

Does anyone know how to fix it?

[sonemy]

Hi.
I've imported the ij.jar in my project and i need to obtain color statistics about my image. Thus, i've imported Color_Histogram plug-in, but i'm not able to manage the RGB value and, above all, the statistics of each color chanel, such as red mean and mode.
Is it possible to intervene in the plug-in processing and get data? Or is there an alternative way to get the statistics and histograms of the RGB channels?

I apologize for my bad English.

Thank you all.

Laura

[Rasband, Wayne (NIH/NIMH) [E]]

On Feb 18, 2011, at 2:38 PM, sonemy wrote:

> Hi.
> I've imported the ij.jar in my project and i need to obtain color statistics
> about my image. Thus, i've imported Color_Histogram plug-in, but i'm not
> able to manage the RGB value and, above all, the statistics of each color
> chanel, such as red mean and mode.
> Is it possible to intervene in the plug-in processing and get data? Or is
> there an alternative way to get the statistics and histograms of the RGB
> channels?

You can get RGB statistics and histograms by using the setWeightingFactors() and getStatistics() methods. Here is a JavaScript example:

 imp = IJ.getImage();
 if (imp.getBitDepth()!=24)
    IJ.error("RGB image required");
 ip = imp.getProcessor();
 ColorProcessor.setWeightingFactors(1,0,0);
 red = ip.getStatistics();
 ColorProcessor.setWeightingFactors(0,1,0);
 green = ip.getStatistics();
 ColorProcessor.setWeightingFactors(0,0,1);
 blue = ip.getStatistics();
 ColorProcessor.setWeightingFactors(1.0/3.0,1.0/3.0,1.0/3.0);
 IJ.log("Means: "+red.mean+", "+green.mean+", "+blue.mean);
 IJ.log("Modes: "+red.mode+", "+green.mode+", "+blue.mode);
 IJ.log("Histogram");
 for (i=0; i<256; i++)
    IJ.log("  "+i+": "+red.histogram[i]+", "+green.histogram[i]+", "+blue.histogram[i]);

[sonemy]

Thank you very very much.

Greetings,
Laura.