Automated evaluation of three dimensional ultrasonic datasets:
Gespeichert in:
| 1. Verfasser: | |
|---|---|
| Format: | Abschlussarbeit Buch |
| Sprache: | English |
| Veröffentlicht: |
2013
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| Schlagworte: | |
| Online-Zugang: | Volltext Volltext http://d-nb.info/1037020626/34 Inhaltsverzeichnis |
| Beschreibung: | VII, 175 S. Ill., graph. Darst. 30 cm |
Internformat
MARC
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| 245 | 1 | 0 | |a Automated evaluation of three dimensional ultrasonic datasets |c vorgelegt von Ahmad Osman |
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| 502 | |a Erlangen-Nürnberg, Univ., Diss., 2013 und Lyon, Ecole Doctorale: Electronique, Electrotechnique, Automatique de l'Institut National des Sciences Appliquées, Diss., 2013 | ||
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Datensatz im Suchindex
| _version_ | 1804151446279553024 |
|---|---|
| adam_text | IMAGE 1
CONTENTS
1. CONTEXT OF THE THESIS 1
1.1. INTRODUCTION 1
1.2. SCIENTIFIC FOCUS AND CONTRIBUTIONS 3
1.3. OUTLINE 4
2. ULTRASOUND NDT TECHNIQUE: ACQUISITION AND IMAGE ANALYSIS 5
2.1. INTRODUCTION 5
2.2. PHASED ARRAY TECHNIQUE 6
2.2.1. PRINCIPLE 7
2.2.2. APPLICATIONS OF PHASED ARRAY TECHNIQUES IN NON-DESTRUCTIVE
TESTING 9 2.2.3. ADVANTAGES AND LIMITATIONS OF THE PHASED ARRAY
TECHNIQUE ... 11 2.2.4. RECONSTRUCTION ALGORITHMS 13
2.3. SAMPLING PHASED ARRAY TECHNIQUE 15
2.3.1. PRINCIPLE 15
2.3.2. SAMPLING PHASED ARRAY ADVANTAGES 18
2.3.3. ACQUISITION SYSTEM 20
2.4. INSPECTION OF COMPOSITE COMPONENTS 23
2.5. ULTRASOUND IMAGE ANALYSIS 24
2.5.1. ARTIFACTS OF ULTRASOUND IMAGES 25
2.5.2. SEGMENTATION OF ULTRASOUND IMAGES 27
2.6. CONCLUSION 30
3. SPECKLE CHARACTERIZATION IN SPA DATA 31
3.1. INTRODUCTION 31
3.2. MODELING THE SPECKLE 32
3.2.1. THEORETICAL PARAMETRIC MODELS OF SPECKLE 33
3.2.2. EMPIRICAL MODELS OF SPECKLE 37
3.3. SPECKLE DISTRIBUTION IN SPA DATA 38
3.3.1. PROPOSED MODEL 39
3.3.2. EXPERIMENTAL RESULTS 40
3.4. SPECKLE NOISE REDUCTION 46
3.4.1. SPATIAL DOMAIN FILTERING TECHNIQUES 48
3.4.2. TRANSFORM-DOMAIN FILTERING TECHNIQUES 50
3.5. CONCLUSION 50
4. PROPOSED METHOD FOR AUTOMATED SEGMENTATION AND CLASSIFICATION OF SPA
DATA 51
4.1. ANALYSIS CHAIN 51
VII
HTTP://D-NB.INFO/1042409544
IMAGE 2
4.2. SEGMENTATION PROCEDURE 52
4.2.1. OVERVIEW 52
4.2.2. DEFINITIONS 53
4.2.3. DATA CORRECTION 55
4.2.4. DATA ENHANCEMENT 57
4.2.5. DETECTION OF ENTRANCE AND BACKWALL LAYERS 63
4.2.6. THRESHOLDING 66
4.2.7. FEATURES EXTRACTION 70
4.3. CLASSIFICATION PROCEDURE 73
4.3.1. BASIC CONCEPT AND DEFINITIONS 74
4.3.2. INFORMATION COMBINATION 76
4.3.3. DATA FUSION CLASSIFICATION 77
4.4. CONCLUSION 87
5. EXPERIMENTAL EVALUATION OF THE PROPOSED SEGMENTATION AND
CLASSIFICATION METHOD 89
5.1. EXPERIMENTAL ENVIRONMENT 89
5.1.1. 3D ULTRASOUND DATASETS OF CFRP SPECIMENS 90
5.1.2. ULTRASOUND DATA SEGMENTATION TOOL 91
5.1.3. DATA FUSION CLASSIFICATION TOOL 91
5.2. EXPERIMENTAL RESULTS OF THE SEGMENTATION PROCEDURE 93
5.2.1. DATA CORRECTION RESULTS 93
5.2.2. DATA ENHANCEMENT RESULTS 96
5.2.3. ENTRANCE AND BACKWALL LAYERS DETECTION RESULTS 105
5.2.4. THRESHOLDING RESULTS 107
5.2.5. FEATURES EXTRACTION RESULTS 116
5.3. EXPERIMENTAL RESULTS OF THE CLASSIFICATION PROCEDURE 117
5.3.1. RESULTS FOR CFRP-14 117
5.3.2. RESULTS FOR CFRP-8 122
5.4. DISCUSSION 124
6. SUMMARY AND OUTLOOK 127
6.1. SUMMARY 127
6.2. OUTLOOK 129
A. DEFINITIONS 131
A.L. ULTRASONIC IMAGING CONCEPTS 131
A.L.L. REFLECTION AND TRANSMISSION COEFFICIENTS 131
A.1.2. ULTRASOUND DISPLAY FORMATS 134
A. 1.3. A-SCAN DISPLAYS 134
A. 1.4. B-SCAN DISPLAYS 134
A. 1.5. C-SCAN DISPLAY 135
B. LIST OF FEATURES 137
B.L. INPUT DATA FORMAT FOR THE DFC METHOD 137
B.2. FEATURES CHARACTERIZING SUSPICIOUS REGIONS 137
IMAGE 3
C. EXPERIMENTAL RESULTS: ENTRANCE AND BACKWALL LAYERS DETECTION 139
C.L. RESULTS FOR THE CFRP-14 VOLUMES 139
C.2. V8-21 AND V8-24 141
C.3. V8-22 142
D. EXPERIMENTAL RESULTS: HYSTERESIS THRESHOLDING 145
D.L. V14-15 145
D.2. V14-100 147
D.3. V8-21 149
D.4. V8-24 150
E. LIST OF PUBLICATIONS 151
LIST OF ABBREVIATIONS AND SYMBOLS 152
BIBLIOGRAPHY 161
|
| any_adam_object | 1 |
| author | Osman, Ahmad |
| author_facet | Osman, Ahmad |
| author_role | aut |
| author_sort | Osman, Ahmad |
| author_variant | a o ao |
| building | Verbundindex |
| bvnumber | BV041361649 |
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| ctrlnum | (OCoLC)862823330 (DE-599)DNB1042409544 |
| dewey-full | 620.11274 |
| dewey-hundreds | 600 - Technology (Applied sciences) |
| dewey-ones | 620 - Engineering and allied operations |
| dewey-raw | 620.11274 |
| dewey-search | 620.11274 |
| dewey-sort | 3620.11274 |
| dewey-tens | 620 - Engineering and allied operations |
| discipline | Maschinenbau / Maschinenwesen |
| format | Thesis Book |
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| indexdate | 2024-07-10T00:54:57Z |
| institution | BVB |
| language | English |
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| spelling | Osman, Ahmad Verfasser aut Automated evaluation of three dimensional ultrasonic datasets vorgelegt von Ahmad Osman 2013 VII, 175 S. Ill., graph. Darst. 30 cm txt rdacontent n rdamedia nc rdacarrier Erlangen-Nürnberg, Univ., Diss., 2013 und Lyon, Ecole Doctorale: Electronique, Electrotechnique, Automatique de l'Institut National des Sciences Appliquées, Diss., 2013 Merkmalsextraktion (DE-588)4314440-8 gnd rswk-swf Bildverarbeitung (DE-588)4006684-8 gnd rswk-swf Mustererkennung (DE-588)4040936-3 gnd rswk-swf Ultraschalldiagnostik (DE-588)4061557-1 gnd rswk-swf Datenfusion (DE-588)4582612-2 gnd rswk-swf (DE-588)4113937-9 Hochschulschrift gnd-content Bildverarbeitung (DE-588)4006684-8 s Datenfusion (DE-588)4582612-2 s Ultraschalldiagnostik (DE-588)4061557-1 s DE-604 Mustererkennung (DE-588)4040936-3 s Merkmalsextraktion (DE-588)4314440-8 s Erscheint auch als Online-Ausgabe urn:nbn:de:bvb:29-opus-47642 https://open.fau.de/handle/openfau/3478 Verlag kostenfrei Volltext https://nbn-resolving.org/urn:nbn:de:bvb:29-opus-47642 Resolvingsystem kostenfrei Volltext http://d-nb.info/1037020626/34 Langzeitarchivierung Nationalbibliothek DNB Datenaustausch application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=026809984&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis |
| spellingShingle | Osman, Ahmad Automated evaluation of three dimensional ultrasonic datasets Merkmalsextraktion (DE-588)4314440-8 gnd Bildverarbeitung (DE-588)4006684-8 gnd Mustererkennung (DE-588)4040936-3 gnd Ultraschalldiagnostik (DE-588)4061557-1 gnd Datenfusion (DE-588)4582612-2 gnd |
| subject_GND | (DE-588)4314440-8 (DE-588)4006684-8 (DE-588)4040936-3 (DE-588)4061557-1 (DE-588)4582612-2 (DE-588)4113937-9 |
| title | Automated evaluation of three dimensional ultrasonic datasets |
| title_auth | Automated evaluation of three dimensional ultrasonic datasets |
| title_exact_search | Automated evaluation of three dimensional ultrasonic datasets |
| title_full | Automated evaluation of three dimensional ultrasonic datasets vorgelegt von Ahmad Osman |
| title_fullStr | Automated evaluation of three dimensional ultrasonic datasets vorgelegt von Ahmad Osman |
| title_full_unstemmed | Automated evaluation of three dimensional ultrasonic datasets vorgelegt von Ahmad Osman |
| title_short | Automated evaluation of three dimensional ultrasonic datasets |
| title_sort | automated evaluation of three dimensional ultrasonic datasets |
| topic | Merkmalsextraktion (DE-588)4314440-8 gnd Bildverarbeitung (DE-588)4006684-8 gnd Mustererkennung (DE-588)4040936-3 gnd Ultraschalldiagnostik (DE-588)4061557-1 gnd Datenfusion (DE-588)4582612-2 gnd |
| topic_facet | Merkmalsextraktion Bildverarbeitung Mustererkennung Ultraschalldiagnostik Datenfusion Hochschulschrift |
| url | https://open.fau.de/handle/openfau/3478 https://nbn-resolving.org/urn:nbn:de:bvb:29-opus-47642 http://d-nb.info/1037020626/34 http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=026809984&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA |
| work_keys_str_mv | AT osmanahmad automatedevaluationofthreedimensionalultrasonicdatasets |