rects = []

xmlnomes = glob.glob('Base1/*.xml' )

for i in range(0,len(xmlnomes)):
    DOMTree = xml.dom.minidom.parse(xmlnomes[i])
    roi = DOMTree.documentElement

    x = int(roi.getElementsByTagName('xmin')[0].childNodes[0].data)
    y = int(roi.getElementsByTagName('ymin')[0].childNodes[0].data)

    width = int(roi.getElementsByTagName('xmax')[0].childNodes[0].data) - x
    height = int(roi.getElementsByTagName('ymax')[0].childNodes[0].data) - y