def thread_worker(self, painting):
        """Function that a thread uses for searching the hall of an image"""
        print("Trying to match a possible painting")
        if (self.paintingDetector.isPainting(painting)):
            matches = self.paintingRecognizer.recognize(painting)
            if matches[0][1] > 0:
                # (hal, image_path, aantalmatches)
                return (matches[0][0], matches[0][2][2], matches[0][1])
        return None