Filtering Out Green Background From RGB 32-bit Image

[Drip]

Hello all,

I've been searching around and testing out the IMAQ ExtractSingeColorPlane and the IMAQ ColorThreshold. I've never done anything with extracting certain colors before, and I seem to run into errors when I try wiring my image source into these IMAQ blocks.

Anyway, I have a VI that opens up my webcam and continuously runs it in video mode (giving me a 32bit RGB image). The VI snaps an image of what the webcam sees and converts it to grayscale, then to a binary image. The problem I've run into is due to the threshold limits it picks up the green background that my objects sit on as well as the objects. I would like to know, if possible, how I could separate the green from the image entirely so that it does not affect my particle analysis? The furthest I've gotten is for the color threshold to spit out a grayscale image, but it doesn't change no matter how I alter the ranges for red, green, or blue.
Any assistance is greatly appreciated.

Thanks

[AdnanZ]

I'm not sure why you are getting errors but that I don't think that has anything to do with the question that you asked.

First, have a look at the following example in the Example Finder (switch to directory structure):

\Vision\2. Functions\Color\Color Threshold Example.vi

Then, can you create an example of what you are doing and post over here so we can look at the steps that you are taking.

[Drip]

Hey thank you for the reply!

I've been using this vi as a sort of guiding tool to try to understand exactly what I'm doing.

I've attached what I want to do (atleast I think that's what I want logically), but I can't seem to get it right.

I've used this same kind of logic for coverting to grayscale and thresholding to create a binary image, so I'm not sure how to do it with color thresholding.

Thanks for your help.

[AdnanZ]

Can you save it for 2012 and then upload?

[Drip]

Err, how do I do that?

Edit: Did this work?

[AdnanZ]

File -> Save for Previous Version..

[Drip]

I guess the previous post upload was incorrect. Sorry >.<

[AdnanZ]

Ah this is not going to help me. Can you please save your image and send it to me so I can figure out how to achieve what you want to do.

[Drip]

So, this is what I'm trying to do. I'm just not sure what's wrong with the logic.

[AdnanZ]

Oh sorry I was asking for the actual image that you acquired. I was able to successfully open your VI.