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I am a beginner using ImageJ. I have an RGB image of a 4" diameter wafer with voiding. I 1st scale the image. I then do a Threshold Color, to highlight only the voids. I then put an ROI around wafer.
I then run the Analyze Particles routine, it surrounds the voids well and in the summary table, the Total Area column seems to come out to the correct # for Total Void Area. But the %Area column # is low, I think because it's using the Total Area\the entire Image area. I would like it to tell me the % of Voiding in the wafer, which would be Total Void Area\ROI Area(wafer area). Is there an easy way to do this, or am I doing something wrong?
Another option is, I am planning to record this in a macro, since I do know the Total Wafer Area, I assume I could do some math to divide the Total void Area by the known wafer Area to get the Wafer % Voiding number I'm looking for outputted through the macro, but would need some help in how to do that. Any help with this would be greatly appreciated. thanks, Steve
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