Paper
Geometric Rectification Using Feature Points Supplied by Straight-lines
- Authors:
- Tengfei Long; Weili Jiao; Wei Wang
- Abstract
- As the geometric rectification methods are mostly based on ground control points (GCPs), the geometric accuracy of remote sensing image usually fails to meet the demand in the area lack of GCPs. In the paper, the advantages and disadvantages of ground control straight-lines (GCLs) used for geometric rectification are discussed in detail first. After introducing the conventional geometric correction methods based on points, a novel geometric correction method based on straight-line features is proposed, the method is not confined to a specific imaging geometric model, and feature points and straight-line features are united to estimate the geometric model. Bundled aerial triangulation equations with tied straight-lines are deduced, and tied straight-lines are applied to block adjustment when GCPs or GCLs are adequate. In the test, instead of merely using control points, the geometric accuracy is guaranteed by using control points together with control straight-lines in the region deficient in feature points.
- Keywords
- Linear feature; Ground control straight-line; Geometric rectification; Generic imaging model
- StartPage
- 25
- EndPage
- 33
- Doi