Abstract: The present invention relates to the field of pedestrian detection, and particularly relates to a multi-scale aware pedestrian detection method based on an improved full convolutional network. Firstly, a deformable convolution layer is introduced in a full convolutional network structure to expand a receptive field of a feature map. Secondly, a cascade-region proposal network is used to extract multi-scale pedestrian proposals, discriminant strategy is introduced, and a multi-scale discriminant layer is defined to distinguish pedestrian proposals category. Finally, a multi-scale aware network is constructed, a soft non-maximum suppression algorithm is used to fuse the output of classification score and regression offsets by each sensing network to generate final pedestrian detection regions.

Abstract: The present invention relates to the field of pedestrian detection, and particularly relates to a multi-scale aware pedestrian detection method based on an improved full convolutional network. Firstly, a deformable convolution layer is introduced in a full convolutional network structure to expand a receptive field of a feature map. Secondly, a cascade-region proposal network is used to extract multi-scale pedestrian proposals, discriminant strategy is introduced, and a multi-scale discriminant layer is defined to distinguish pedestrian proposals category. Finally, a multi-scale aware network is constructed, a soft non-maximum suppression algorithm is used to fuse the output of classification score and regression offsets by each sensing network to generate final pedestrian detection regions.

Abstract: The present invention provides a high speed signal fan-out method for BGA and a PCB using the same. The method comprises: providing a printed circuit board (PCB), providing a plurality of vias and signal traces of the vias on the PCB; and providing back-drilled holes for routing of other signal traces at positions corresponding to the vias. The vias are arranged into a plurality of straight lines from an edge to the center of the PCB. The plurality of straight lines each is horizontal or vertical. The signal traces of the vias in a straight line are arranged from high to low or from low to high with respect to routing positions of the vias, and the back-drilled holes of the plurality of vias are arranged in descending or ascending order corresponding to the depths of the back-drilled holes.

Abstract: The present invention provides a high speed signal fan-out method for BGA and a PCB using the same. The method comprises: providing a printed circuit board (PCB), providing a plurality of vias and signal traces of the vias on the PCB; and providing back-drilled holes for routing of other signal traces at positions corresponding to the vias. The vias are arranged into a plurality of straight lines from an edge to the center of the PCB. The plurality of straight lines each is horizontal or vertical. The signal traces of the vias in a straight line are arranged from high to low or from low to high with respect to routing positions of the vias, and the back-drilled holes of the plurality of vias are arranged in descending or ascending order corresponding to the depths of the back-drilled holes.

Abstract: The present invention provides a signal trace fan-out method for double-sided mounting on a PCB, including: respectively providing one or more blind vias on the top-layer surface and the bottom-layer surface of a PCB; and fanning out, through each of the blind vias, one or more signal traces of to-be-mounted components on the top-layer surface and the bottom-layer surface of the PCB. The number and positions of the blind vias are set based on the size of routing space when the to-be-mounted component is mounted on the top-layer surface or the bottom-layer surface of the PCB. In a manner of combining the blind vias with through holes, the present invention achieves successful fan-out of the signal traces when QSFP-DD connectors are mounted at same positions on both the top layer and the bottom layer of the PCB, and ensures relatively good signal integrality.