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当前从遥感图像上借以识别地物的仍然是它的波谱特征。仅仅凭借这一特征,还不能充分利用遥感图象所包含的信息。从经验中知道,物体的阴影对于识别其三维结构有非常重要的作用,尤其在不同的入照和观测方向上,从观察到的阴影变化可以推断出物体的三维结构特征。本文着重讨论构成粗糙表面的基本颗粒之间相互遮蔽对二向性反射的影响。1 二向性反射分布函数(BRDF)及其几何-光学模型地面物体的反射是个非常复杂的物理现像,它是入射光天顶角θ_i和方位角φ_i,观测的天
The current borrowing from the remote sensing images to identify features is still its spectral features. Only by virtue of this feature, the information contained in remote sensing images can not be fully utilized. From experience, it is known that the shadow of an object plays an important role in recognizing its three-dimensional structure. In particular, the three-dimensional structural features of an object can be deduced from observed shadow changes, especially in different directions and directions. This article focuses on the influence of mutual shading among the elementary particles that make up a rough surface on bifurcation reflections. 1 BRDF and its geometrical-optical model The reflection of ground objects is a very complex physical phenomenon, which is the angle θ_i and the azimuth φ_i of the incident light, the observed day