I would like to detect specific characteristic from laparoscopy surgery. The item that I want to detect appears here https://www.dropbox.com/s/n0yxrt7o4llv6l8/im1_55.bmp?m The negative images that I use are similar with that https://www.dropbox.com/lightbox/home But when I take the xml file and use it in my program can not recognize any object. Do anyone know what is the problem?