image gray value的用法和样例：
例句
- Thirdly, all pixels' gray values are acquired by the interpolation of the matching pairs.
最后对匹配点的灰度进行插值，得到插值像素点的灰度值。 - The algorithm uses the obtained grey value characteristic point as the searching foundation, which is different from the traditional ergodic search strategy.
该算法利用得出的灰度值特征点作为搜索依据，改变了传统匹配方法遍历性质的搜索策略。
