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ndltd-OhioLink-oai-etd.ohiolink.edu-toledo1260901996
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oai_dc
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ndltd-OhioLink-oai-etd.ohiolink.edu-toledo12609019962021-08-03T06:07:33Z Pavement Information System: Detection, Classification and Compression Hong, Lihao This thesis presents a crack detection and classification algorithm and describes the procedure of pavement image compression for efficient storage. The algorithm is built upon wavelet transform. The application of wavelets to images yields different frequency sub-bands. Also, this algorithm is based on the fact that crack pixels are darker than their surroundings. The crack detection algorithm decomposes a pavement image into four sub-bands: one low frequency sub-band called approximation and three high frequency sub-bands called detail. Cracks appear clearly in the low frequency subband at the first level through extended pseudo color matrix scaling. The algorithm of classification first revises and re-computes the horizontal, vertical and diagonal details at the first level through the energy conservation function, and then forms a new image through adding corresponding points in the four new sub-bands; finally it applies Radon transform to this new image. For images compressed for storage, the algorithm combining noise reduction and compression through wavelet transform is used. 2009 English text University of Toledo / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=toledo1260901996 http://rave.ohiolink.edu/etdc/view?acc_num=toledo1260901996 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws.
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| collection |
NDLTD
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| language |
English
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| sources |
NDLTD
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| author |
Hong, Lihao
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| spellingShingle |
Hong, Lihao
Pavement Information System: Detection, Classification and Compression
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| author_facet |
Hong, Lihao
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| author_sort |
Hong, Lihao
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| title |
Pavement Information System: Detection, Classification and Compression
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| title_short |
Pavement Information System: Detection, Classification and Compression
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| title_full |
Pavement Information System: Detection, Classification and Compression
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| title_fullStr |
Pavement Information System: Detection, Classification and Compression
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| title_full_unstemmed |
Pavement Information System: Detection, Classification and Compression
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| title_sort |
pavement information system: detection, classification and compression
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| publisher |
University of Toledo / OhioLINK
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| publishDate |
2009
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| url |
http://rave.ohiolink.edu/etdc/view?acc_num=toledo1260901996
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| work_keys_str_mv |
AT honglihao pavementinformationsystemdetectionclassificationandcompression
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| _version_ |
1719431308204048384
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