This thesis is devoted to the shadow detection and compensation in aerial
images with application of the detection results to building height detection.
Shadows could be defined as the parts of the scene that is not directly
illuminated by a light source due to obstructing object or objects. Usually the
shadows in images or video are undesirable, since they could cause
degradation of the expected results during processing of the image or video
for object detection, segmentation, scene surveillance or similar purposes.
However shadow information could also be used for beneficial purposes like
revealing information about the object&rsquo / s shape, orientation and even about
the light source. In this thesis firstly shadow detection methods are
overviewed. Beside the selected methods from literature, some novel
approaches are also proposed and experimented. Then shadow
compensation methods are overviewed and experimented. Finally an
example of beneficial utilizations of shadow information is studied, where
buildings&rsquo / heights are estimated from their shadow length and sun angles.
| Identifer | oai:union.ndltd.org:METU/oai:etd.lib.metu.edu.tr:http://etd.lib.metu.edu.tr/upload/12612560/index.pdf |
| Date | 01 September 2010 |
| Creators | Seref, Ahmet |
| Contributors | Alatan, A. Aydin |
| Publisher | METU |
| Source Sets | Middle East Technical Univ. |
| Language | English |
| Detected Language | English |
| Type | M.S. Thesis |
| Format | text/pdf |
| Rights | To liberate the content for public access |
Page generated in 0.0015 seconds