关键词: 微分几何 遥感影像 线状地物 提取

Abstract:

Automatic recognition and acquisition of the objective information from remote sensing images is a main development direction of remote sensing data p rocessing. Through studying some fundamental properties of the curved surface in differential geometry , a method of linear feature extraction based on  differential geometry is introduced. First, a conicoid function of the curved surface function is simulated in a given local area. And by this function, the gradient and curvature of the gray curved surface are estimated. Suitable gradient and curvature thresholds are established to detect linear featur es. Finally, post-processing is performed to remove a lot of noise particles and small areas. The experiments indicate that this method is effective in   the extraction of linear features with a certain width.

Key words: differential geometry, remote sensing image, linear feature, extraction