In the past few decades, deep learning technology has been widely used in
medical image segmentation and has made significant breakthroughs in the fields
of liver and liver tumor segmentation, brain and brain tumor segmentation,
video disc segmentation, heart image segmentation, and so on. However, the
segmentation of polyps is still a challenging task since the surface of the
polyps is flat and the color is very similar to that of surrounding tissues.
Thus, It leads to the problems of the unclear boundary between polyps and
surrounding mucosa, local overexposure, and bright spot reflection. To counter
this problem, this paper presents a novel U-shaped network, namely DSFNet,
which effectively combines the advantages of Dual-GCN and self-attention
mechanisms. First, we introduce a feature enhancement block module based on
Dual-GCN module as an attention mechanism to enhance the feature extraction of
local spatial and structural information with fine granularity. Second, the
stand-alone self-attention module is designed to enhance the integration
ability of the decoding stage model to global information. Finally, the Fast
Normalized Fusion method with trainable weights is used to efficiently fuse the
corresponding three feature graphs in encoding, bottleneck, and decoding
blocks, thus promoting information transmission and reducing the semantic gap
between encoder and decoder. Our model is tested on two public datasets
including Endoscene and Kvasir-SEG and compared with other state-of-the-art
models. Experimental results show that the proposed model surpasses other
competitors in many indicators, such as Dice, MAE, and IoU. In the meantime,
ablation studies are also conducted to verify the efficacy and effectiveness of
each module. Qualitative and quantitative analysis indicates that the proposed
model has great clinical significance.Comment: 10 pages, 6 figures, 3 table