Returns last Rgbd. 

        @return last JdeRobotTypes Rgbd saved

def getRgbd(self):
        '''
        Returns last Rgbd. 

        @return last JdeRobotTypes Rgbd saved

        '''
        img = Rgb()      
        if self.hasproxy():
            self.lock.acquire()
            img = self.image
            self.lock.release()
        return img