关键词: 遥感影像 阴影检测 直方图 势函数 图像分割

Abstract:

Shadow brings difficulties to object recognition in the high-resolution panchromatic remote sensing images. On the other hand, it contains much inform ation about the hierarchy and height of the objects on the ground. We fit the gray histogram of the panchromatic remote sensing image by its potential f  unction, and find the first vale point by the first difference. Shadow detection is then performed by threshold segmentation using the gray value which  corresponds to the vale point. The experimental results show that this method is capable of selecting the segmentation threshold rapidly and auto- matic  ally in complex images,and the shadows are detected correctly.

Key words: remote sensing, shadow detection, histogram, potential function, image segmentation