在OpenCV 2.3.0中计算Thresholded IplImage中“White Blobs”数量的最佳方法

I need to count the number of white blobs in a Thresholded image. I'm counting small squares on a marker. But due to the poor image quality of the webcam, these squares don't appear as squares. This is why I decided to use Blob detection. This is for an Augmented reality application. Is my decision right?I need to count the number of white blobs in a