Integrating Deformable Convolution and Pyramid Network in Cascade R-CNN for Fabric Defect Detection

Defects on the surface of fabrics seriously affect the production speed and quality of textile products. There are many difficulties in the detection of surface defects on fabrics, such as substantial differences in length-width ratio, uneven distribution, and few features. However, existing methods have the disadvantages of slow detection speed and high misdetection rate. This present study proposes a method of integrating deformable convolution and pyramid network in Cascade R-CNN (IDPNet) for fabric defect detection. First, image data are labeled according to the type and distribution of defects. Then we design a novel multi-stage object detection architecture named IDPNet to detect defects on the surface of fabrics. In the first stage, Resnet50, in combination with feature pyramid network and deformable convolution is used to improve the detection performance of small defects. Besides, we trained a sequence of detectors with increasing IoUs stage by stage based on Cascade R-CNN in the second stage. Finally, experimental results demonstrate that the proposed neural network equip an outstanding performance against other approaches and achieve the accuracy of 91.57% in fabric defect detection, which proves its utility in practice.