MVTec Software GmbH
 

3D 视觉技术 – 单目 2½D(高度图像)

HALCON 和 MERLIC 特色技术
Depth from focus
在不同距离拍摄物体的若干图像。焦点的变化可用于计算距离信息。
Sheet of light
沿一束投影光线测量物体的轮廓,可以确定物体的 3D 形状。

单目 2½D – Depth from Focus 和 Sheet of Light

有多种“主动技术”可用于通过一台相机提取高度信息。得到的 3D 信息非常类似于双目立体。最常用的方法有:

  • Depth from focus (DFF) 通过计算图像所有像素的焦点来提取距离信息。使用小景深计算物体表面与相机的距离。
  • Sheet of light 意指通过重建物体上的投射光线来测量物体的高度轮廓。

这些技术尤其适用于三维重建,DFF 特别适用于小型物体,sheet of light 则适用于没有纹理的物体。典型应用示例包括 3D 物体的质量检查以及 3D 物体的位置识别。

对于密集的高度图,我们的软件提供了多种可用于处理 2½D 图像的方法,例如确定 3D 平面之间的物体边缘或角度。Sheet of light 还可以实现面向线或点的高精准度 3D 测量。

 

DFF 示例
使用我们的软件,通过 DFF 进行 PCB 跟踪检查。
Sheet of light 示例
使用我们的软件,通过 sheet of light 测量物体。

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