NI Vision: Color Spectrum

Hallo,
I have a more or less tricky question to the community. As a part of my PHD-Thesis, I have to measure the residence time of particles in a machine . I want to use UV-fluorescent plastic granulate as tracer. In a first step I want to do a simple feasibility study. I have 2 Webcams (using IMAQdx) and a conveyor belt, measuring the intensity of fluorescation under black-light and calculating the time, dedicated by the conveyor, between the "peaks". I want to use the "Color Spectrum" VI to get a value for the blue intensity of the picture.
So I want to ask 2 questions to experts:
1.) If I use the Color Spectrum VI I get an array as result BUT which array value stands for blue? (The Help gives me no usable answer)
2.)Has anyone a better idea instead of using the Color Spectrum VI?
Thank you for your efforts!
Best regards,
Paul

Hi Bublina
It was not intended as a Hi-Jack
The question I tried to formulate, is so closely related, (on how to use the color learn / color match efficiently) that I thought creating a new thread would merely make someone link to this one.
- I have no problem with using the Hue-Sat space, in fact I already tried using the IMAQ color treshold on RGB space with terrible results, and have tried without achieving a robust result with the HSL space.
The reason for abandoning the strategy (probably to fast) was due to the problems I faced with manually determining the optimal color spectrums for each layer.
I am basicly looking for 3 shades of pink, and one gray layer that have similar intensities as one of the pink shades..
I will re-visit the idea after you'r comment, and use a little more time on calibrating color spectrums, but have little confidence that I can eperate the layers robustly using only 3 color space threshold attributes.
It seems that in tests the combination of using colorLearn / colorMatch can seperate the layers robustly.
So I am very interested in the original question, and may have formulated my own in a slightly wrong way.
What I tried to ask was that I would very much be able to use the "color spectrum" from colorLearn to do a histogram (like you'r example shows for the HSL space) but I want to do the histogram on the entire parameter set in color spectrum, as this seems to seperate colors better than I could do manually.
Hence I also, like the original questioneer, have interest in knowing what the parameters in the Color Spectrum Array, are indicating.
I did not get much knowledge from running the example linked to...
thank you for the help though
Engineer, M.Sc. Autonomous Systems, Automation and Control of non-linear systems
Project Engineer @ R&D A/S
www.rdas.dk

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