texture featuring based on watershed karsten rodenacker, uta jütting gsf-institut für...
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![Page 1: Texture Featuring Based on Watershed Karsten Rodenacker, Uta Jütting GSF-Institut für Biomathematik und Biometrie Neuherberg 11.05.98](https://reader035.vdocuments.us/reader035/viewer/2022062620/551b71f7550346d31b8b60fc/html5/thumbnails/1.jpg)
Texture Featuring Based on Watershed
Karsten Rodenacker, Uta JüttingGSF-Institut für Biomathematik und Biometrie
Neuherberg11.05.98
![Page 2: Texture Featuring Based on Watershed Karsten Rodenacker, Uta Jütting GSF-Institut für Biomathematik und Biometrie Neuherberg 11.05.98](https://reader035.vdocuments.us/reader035/viewer/2022062620/551b71f7550346d31b8b60fc/html5/thumbnails/2.jpg)
Content
Introduction Some remarks about watershed Textural featuring Examples Summary
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Introduction
TexturesProperties Texture elements
Regularity ?
What is texture ?Segmentation
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Some remarks about watershed
Definition Given an image and a local maximum at point m.
Consider all monotonous decreasing paths w(m,l) starting from m and ending in l.
The set of all points l is a connected region. The set of all such regions is a partition of the
input image, the order corresponds with the number of local maximums.
The borders of the regions are the watersheds
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Some remarks about watershed
Definition (continued) The inversion of the above definition
concerning maximum by minimum and decreasing by increasing delivers a second type of watershed.
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Some remarks about watershed
Explanation 1-dimensional
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Some remarks about watershed
Explanation 2-dimensional
![Page 8: Texture Featuring Based on Watershed Karsten Rodenacker, Uta Jütting GSF-Institut für Biomathematik und Biometrie Neuherberg 11.05.98](https://reader035.vdocuments.us/reader035/viewer/2022062620/551b71f7550346d31b8b60fc/html5/thumbnails/8.jpg)
Some remarks about watershed
Explanation 2-dimensional
![Page 9: Texture Featuring Based on Watershed Karsten Rodenacker, Uta Jütting GSF-Institut für Biomathematik und Biometrie Neuherberg 11.05.98](https://reader035.vdocuments.us/reader035/viewer/2022062620/551b71f7550346d31b8b60fc/html5/thumbnails/9.jpg)
Some remarks about watershed
Result of transformation Input image (original, smoothed 3x3)
![Page 10: Texture Featuring Based on Watershed Karsten Rodenacker, Uta Jütting GSF-Institut für Biomathematik und Biometrie Neuherberg 11.05.98](https://reader035.vdocuments.us/reader035/viewer/2022062620/551b71f7550346d31b8b60fc/html5/thumbnails/10.jpg)
Some remarks about watershed
Result of transformation Watersheds (labelled regions)
![Page 11: Texture Featuring Based on Watershed Karsten Rodenacker, Uta Jütting GSF-Institut für Biomathematik und Biometrie Neuherberg 11.05.98](https://reader035.vdocuments.us/reader035/viewer/2022062620/551b71f7550346d31b8b60fc/html5/thumbnails/11.jpg)
Some remarks about watershed
Result of transformation Watersheds
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Some remarks about watershed
Result of transformation Lower, upper ricefield
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Some remarks about watershed
Result of transformation Half height segmentation HU (black)/HL (white)
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Textural featuring
global Statistical estimators (moments) from:
– half height segmentations and original
– topological gradient
Derived parameters– stereological (volume densities)
– densitometric
– morphometric
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Textural featuring
global, e.g.
VVHUA
AU volume density
PAHUA
HUNOU mean particle area
E HUNO HLNO Euler number
RDDHUM HLM
M
1 1
1Rel. density difference
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Textural featuring
heuristical neighborhood related of connected regions
(graph theoretical approach)– connectivity
– distances
neighborhood AND intensity related– pattern matching
...
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Examples
global texture features: VVU Volume density
RDD Relative density difference
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Examples
Projects Differentiation of hormone status of breast
carcinoma patients VVU, RDD
Differentiation of osteoblasts under different growth conditions (Osteoporosis) RHUA
Differentiation of neuroendocrine lung tumours
HUCV
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![Page 20: Texture Featuring Based on Watershed Karsten Rodenacker, Uta Jütting GSF-Institut für Biomathematik und Biometrie Neuherberg 11.05.98](https://reader035.vdocuments.us/reader035/viewer/2022062620/551b71f7550346d31b8b60fc/html5/thumbnails/20.jpg)
Examples
global texture features: RDD
![Page 21: Texture Featuring Based on Watershed Karsten Rodenacker, Uta Jütting GSF-Institut für Biomathematik und Biometrie Neuherberg 11.05.98](https://reader035.vdocuments.us/reader035/viewer/2022062620/551b71f7550346d31b8b60fc/html5/thumbnails/21.jpg)
Examples
![Page 22: Texture Featuring Based on Watershed Karsten Rodenacker, Uta Jütting GSF-Institut für Biomathematik und Biometrie Neuherberg 11.05.98](https://reader035.vdocuments.us/reader035/viewer/2022062620/551b71f7550346d31b8b60fc/html5/thumbnails/22.jpg)
Examples
Projects
![Page 23: Texture Featuring Based on Watershed Karsten Rodenacker, Uta Jütting GSF-Institut für Biomathematik und Biometrie Neuherberg 11.05.98](https://reader035.vdocuments.us/reader035/viewer/2022062620/551b71f7550346d31b8b60fc/html5/thumbnails/23.jpg)
Summary
+ Topology by watershed Taxonomy of transformation results
+ Segmentation
+ Parameter free featuring
- Noise sensitivity of watershed
- Difficulties of interpretation for natural images (reflected light, shadows, ...)