用多幅照片求取机翼面积率的方法

与传统的查找表法不同， 本文提出利用一般光滑物体表面反函数的近似公式来获得反射率图，并根据图像照度等式建立一个关于表面梯度的非线性方程组，通过求解这一方程组可以得到物体的表面梯度，从而得到物体（如机翼）表面方向。并用此方法来计算机翼的面积率。

Solving the Rate of Wing Cross Sectional Area from Multiple Images

This paper introduces a method with which the surface orientation of the object is solved. It is different from the traditional look-up table method. The reflectance map is obtained by use of an approximate formula for the surface reflectance function of a general smooth object, and a group of nonlinear equations that relate the map with the image intensities are established in the method. The surface gradient and surface orientation of the object is got'when the group of equations are solved,and the rate of the cross sectional area of the wings may be computed.