How to Filter for a specific color. Search Rectangles / Circles.

Hello everyone. I wonder if I can help with the following:
* I would like to know the right way to filter a specific color (red or orange, green, blue, etc) in an image, as well as control / VI that I use.
* Also if you have any example of detection / identification of rectangles, circles in an image?
I'm thinking binarized pictures to look into it type circles geometric shapes, squares and rectangles.
Thank you.

Thanks Muks.
I have successfully used thershould color but have not correctly select a color, looks just like an issue of quality of the image with which I work. With regard to locating an object, I can not connect to valid data input control ROI shape descriptor matching.
Unsuccessfully try to connect the property node control ROI dysplay classic, but they are different data.
Thanks again.

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How to Filter for a specific color. Search Rectangles / Circles.

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