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Fusing filter enhancement and reverse attention network for polyp segmentation
LIN Jianzhuang, YANG Wenzhong, TAN Sixiang, ZHOU Lexin, CHEN Danni
Journal of Computer Applications    2023, 43 (1): 265-272.   DOI: 10.11772/j.issn.1001-9081.2021111882
Abstract239)   HTML7)    PDF (2283KB)(121)       Save
Accurate segmentation of the polyp region in the colonoscopic images can assist doctors in diagnosing intestinal diseases. However, the structure information of polyp region is missing in the down sampling process, and the existing methods have the problems of over segmentation and under segmentation.Aiming at the problems above, a Fusing Filter enhancement and Reverse attention segmentation Network (FFRNet) was proposed. Firstly, Filter Enhancement Module (FEM) was added to the skip-connection to enhance the structure information of local lesion region in the down-sampling features. Secondly, the global features were obtained by aggregating the shallow features. Finally, Multiscale reverse Attention Fusion Mechanism (MAFM) was adopted in the up-sampling process, by combining the global features and up-sampling features to generate the reverse attention weight, the polyp region information was mined in the features layer by layer, and the relationship between the target region and the boundary was established by the guidance network to improve the integrity of the model on polyp region segmentation. On Kvasir and CVC-ClinicDB datasets, compared with Uncertainty Augmented Context Attention Network (UACANet), FFRNet has Dice Similarity Coefficient (DSC) increased by 0.22% and 0.54% respectively. Experimental results show that FFRNet can effectively improve the accuracy of polyp image segmentation and has good generalization ability.
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