def METHOD_NAME(self, url):
    if not url:
        return None
    dimensions = re.compile(r'/(\d+x\d+)/').search(url)
    dimensions = dimensions and dimensions.group(1)
    if dimensions:
        dims = map(int, dimensions.split('x'))
        if min(dims) < self.MIN_DIMENSION:
            print_d("%s is too small to use" % dimensions)
            return None
    return {'cover': url, 'dimensions': dimensions}