Reconstruction and object classification results for three samples

The reconstruction results from four-sided scanning using our previously developed MMW point cloud reconstruction algorithm are illustrated. The light blue part is the perimeter of the cardboard box, the pink part is the scissors, the dark blue part is the knife, and the red part is the hammer. The results show that even though the objects overlap each other, the reconstruction results of four-sided scanning can still get the rough outline of each object, which is unachievable with 2D imaging. Due to the fact that some of the canceled objects are made of non-metallic materials such as wood and plastic, the reconstructed contours of the objects appear uneven and hollow. The object classification outcome, wherein the concealed objects are boxed, and the object classification results are displayed beneath the box.

本研究展示了使用我方此前研发的毫米波（MMW）点云重建算法完成四面扫描后的物体重建结果。其中浅蓝色区域为硬纸板箱的外轮廓，粉色区域为剪刀，深蓝色区域为刀具，红色区域为榔头。实验结果表明，即便目标物体间存在相互遮挡的情况，四面扫描的重建结果仍可还原出各物体的大致轮廓，这一效果是二维成像无法实现的。由于部分被扫描的物体采用木材、塑料等非金属材质制作，重建得到的物体轮廓会呈现出凹凸不平且存在空洞的状态。在物体分类结果中，被遮挡的物体已通过框体标注，分类结果则展示于对应框体的下方。