int TExtractFeature::Feature2PairSearch(THash &hash){
	int pi, pj;
	int count;
	int flag;
	/* int index = 0; */
	for (int i = 0; i<frame_num; i++)
	for (int j = 0; j<FRAME_HEIGHT; j++){
		flag = 1;
		if (feature[i][j] == 0)
			continue;
		count = 0;
		for (pi = i + PAIR_OFFSET; flag && pi<i + PAIR_DX && pi<frame_num; pi++)
		for (pj = max(j - PAIR_DY, 0); flag && pj<j + PAIR_DY && pj<FRAME_HEIGHT; pj++){
			if (feature[pi][pj] == 0)
				continue;
			count++;
			hash.Vote(j, pj-j+f2_f1_max, pi-i, i);
			/* if (count >= MAX_PAIR_PER_FEATURE) flag = 0; */
		}
	}
	return 0;
}