title: cvBlob and cvBlobLib in openCV
body: <p>I want to extract the white area of my binary image. Everywhere I check on the internet, I see stuff about cvBlob and cvBlobLib. I don't really know what these are since I am just working with openCV and C++. Do I need to install those extra things to extract the white area from my binary image. The white area is a person walking.</p>