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MatrixNets: A New Scale and Aspect Ratio Aware Architecture for Object Detection

by   Abdullah Rashwan, et al.

We present MatrixNets (xNets), a new deep architecture for object detection. xNets map objects with similar sizes and aspect ratios into many specialized layers, allowing xNets to provide a scale and aspect ratio aware architecture. We leverage xNets to enhance single-stage object detection frameworks. First, we apply xNets on anchor-based object detection, for which we predict object centers and regress the top-left and bottom-right corners. Second, we use MatrixNets for corner-based object detection by predicting top-left and bottom-right corners. Each corner predicts the center location of the object. We also enhance corner-based detection by replacing the embedding layer with center regression. Our final architecture achieves mAP of 47.8 on MS COCO, which is higher than its CornerNet counterpart by +5.6 mAP while also closing the gap between single-stage and two-stage detectors. The code is available at


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Code Repositories


PyTorch implementation for MatrixNet object detection architecture.

view repo


work in progress for masters' thesis.

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目标检测任务通用网络架构MatrixNet:corners and centers

view repo