Deep Learning-Based Multi-Species Appearance Defect Detection Model for MLCC

The appearance defects in Multilayer Ceramic Capacitor (MLCC) adversely affect its performance and reliability. Thus, detecting these defects during MLCC production is imperative. However, this task faces numerous challenges, such as significant variations in the shape and size of defects, indistinct defect boundaries, and the inefficiency of manual detection methods. To address these issues, this paper proposes the RSE-YOLO model for identifying, localizing, and classifying defects in MLCC images. We design a novel backbone structure, namely the Residual Coordinate Weighted Convolutional Network, which possesses enhanced feature information extraction capabilities for accurately locating defect areas. Additionally, we introduce the Space Attention Pyramid Pooling Module to achieve weighted fusion of local and global feature information. Furthermore, the ECA-PAN is employed as the model’s neck structure to facilitate the fusion of feature information at different scales, improving the model’s generalization ability in multi-scale defect detection. Experimental results demonstrate that the RSE-YOLO model exhibits excellent performance on the MLCC dataset, achieving an mAP ₅₀ of 93.9%, mAP _50-95 of 63.2%, F1 of 90.9%, and a frame rate of 57 FPS, meeting the requirements for the task of MLCC appearance defect detection.