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However, due to the interference of complex environment, such as illumination, shadow and noise, the automatic crack detection solution cannot meet the requirements of accuracy and efficiency. In this paper, we present an extended version of U-Net framework, named MSK-UNet, for pavement crack to solve these challenging problems. Specifically, first, the U-shaped network structure is chosen as the framework to extract more hierarchical representation. Second, we introduce selective kernel (SK) units to replace U-Net\u2019s standard convolution blocks for obtaining the receptive fields with distinct scales. Third, multi-scale input layer establishes an image pyramid to retain more image context information at the encoder stage. Finally, a hybrid loss function including generalized Dice loss with Focal loss is employed. In addition, a regularization term is defined to reduce the impact of imbalance between positive and negative samples. To evaluate the performance of our algorithm, some tests were conducted on DeepCrack dataset, AsphaltCrack300 dataset and Crack500 dataset. Experimental results show that our approach can detect various crack types with diverse conditions, obtains a better performance in precision, recall and [Formula: see text]-score, with 97.43%, 96.95% and 97.01% precision values, 82.51%, 93.33% and 87.58% recall values and 95.33%, 99.24% and 98.55% [Formula: see text]-score values, respectively.<\/jats:p>","DOI":"10.1142\/s0218126623500068","type":"journal-article","created":{"date-parts":[[2022,7,9]],"date-time":"2022-07-09T02:19:40Z","timestamp":1657333180000},"source":"Crossref","is-referenced-by-count":15,"title":["MSK-UNET: A Modified U-Net Architecture Based on Selective Kernel with Multi-Scale Input for Pavement Crack Detection"],"prefix":"10.1142","volume":"32","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-1834-5774","authenticated-orcid":false,"given":"Xiaoliang","family":"Jiang","sequence":"first","affiliation":[{"name":"College of Mechanical Engineering, Quzhou University, Quzhou, Zhejiang 324000, P.\u00a0R.\u00a0China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jinyun","family":"Jiang","sequence":"additional","affiliation":[{"name":"College of Mechanical Engineering, Quzhou University, Quzhou, Zhejiang 324000, P.\u00a0R.\u00a0China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jianping","family":"Yu","sequence":"additional","affiliation":[{"name":"College of Mechanical Engineering, Quzhou University, Quzhou, Zhejiang 324000, P.\u00a0R.\u00a0China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jun","family":"Wang","sequence":"additional","affiliation":[{"name":"College of Mechanical Engineering, Quzhou University, Quzhou, Zhejiang 324000, P.\u00a0R.\u00a0China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ban","family":"Wang","sequence":"additional","affiliation":[{"name":"School of Mechanical Engineering, Hangzhou Dianzi University, Hangzhou, Zhejiang 310018, P.\u00a0R.\u00a0China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"219","published-online":{"date-parts":[[2022,7,28]]},"reference":[{"key":"S0218126623500068BIB001","doi-asserted-by":"crossref","first-page":"2451","DOI":"10.1007\/s11771-021-4779-6","volume":"28","author":"Yang Q.","year":"2021","journal-title":"J. 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