ABSTRACT
Here blue from the sky is the dominant color of the power line.
2 FOUR STEP APPROACH
The goal to extract the power lines from the background is achieved by segmentation:
• Point operations (e.g. convert to binary by thresholding)
• Edge operations ( differential) • Region based operations (e.g. dilation) • Object identification (e.g. with Hough
transformation)
2.1 Pre-processing
The lines are finally detected by a Hough transformation which is difficult to interpret with too much texture in the image. Since the background may be highly structured and the contrast between
1 INTRODUCTION
For collision avoidance and also for tracking of power lines during inspection an unmanned airship is equipped with a high-resolution camera. The lines are detected by image processing.
