Removing blobs from a binary image

Question

I have a binary image which contain few blobs.

I want to remove blobs which are less than a certain area.

Can any one suggest me a way?

I am using Open-C

Answer 1

            //src_gray is your image that we threshold
            threshold(src_gray, threshold_output, NULL, 255, THRESH_OTSU);
            /// Find contours
            findContours(threshold_output, contours, hierarchy, RETR_TREE, CHAIN_APPROX_SIMPLE, Point(0, 0));
            /// Approximate contours
            vector boundRect(contours.size());
            for (unsigned int i = 0; i < contours.size(); i++)
            {   //identify bounding box
                boundRect[i] = boundingRect(contours[i]);
            }
            for (unsigned int i = 0; i < contours.size(); i++)
            {

                if ((boundRect[i].area() < //enter your area here))
                {
                    src_gray(boundRect[i])=//set it to whatever value you want;
                }
            }

Well give this a try...