How can i detect a single color from an image?

Hello,

Sorry about the original question. I edited my question. I hope it is now clear. Here it is:

I have a picture with a white ball in it. I would like to detect the color white so i can use use a hough transform to detect the circle.

I know i have to convert my rgb image to an hsv image.

I would like to be able to detect any color. ie: orange, green...

Thank you for your help

[Jarrod Rivituso]

Would you mind clarifying a bit? When you say "filter", do you mean remove it? Or perhaps make it less noisy?

[Walter Roberson]

How are you defining your colors? Purely by hue? If so then what if the hue comes out somewhere between the hue of two well-known colors ?

[Hervé Chubaka Bagalwa]

Hello friends,

I edited my question. I hope it is clear now.