the second is utilizing surface fitting method to correct distorted pixels.Experiments have proved the method has a good effect, and its has been applied in practical data processing in HRIS.

• 第二步，通过曲面拟合方法，对检测出的畸变像元强度进行校正．实验表明该校正方法，具有很好的效果，并应用到了实际的HRIS数据处理中。