Easy3DPCBWarpage

Support
Required licenses	Easy3D and EasyGauge
Recommended images	The images from the folder Sample Images/3D/PCB Warpage
Location	3D Processing/Easy3DPCBWarpage

Purpose

This sample program demonstrates how to:

• Measure the warpage of a PCB with Easy3D.

Code highlights

1. Search for the PCB plane.

   float maximumDistanceToPlane = 1.0f; // 1.0 mm (the warpage is assumed to be smaller than this)
   EPlaneFinder finder(maximumDistanceToPlane); // tolerance for plane search = 1.0 mm
   E3DPlane refPlane1 = finder.Find(pc_); // finds the largest plane in the point cloud
   

2. Crop any point distant from PCB plane.

   EPlaneCropper cropperPCB(refPlane1); // 'refPlane_1' = ref. plane for the cropper
   EPointCloud pcPlaneOnly; // only keep points close to the ref. plane
   cropperPCB.Crop(pc_, pcPlaneOnly, EPlaneCropperType_KeepClose, maximumDistanceToPlane);
   

3. Apply a noise removal filter: zmapBeforeAlignment > zmapBeforeAlignmentFilter1.

   EZMap16 zmapBeforeAlignmentFilter1; // output of the filter
   zmapBeforeAlignmentFilter1.SetSize(zmapBeforeAlignment);
   EFilters::RemoveNoise(zmapBeforeAlignment, zmapBeforeAlignmentFilter1, ENoiseRemovalMethod_AbsoluteDifferenceFromMean,halfKernelSizeFilter, thresholdFilter, ratioValidPixelsFilter, false);
   

4. Calculate the warpage in metric units.

   OEV_UINT32 validCount;
   float minValue, maxValue, averageValue;
   EStatistics::ComputeStatistics(zmap_, validCount, minValue, maxValue, averageValue);
   float warpage = maxValue - minValue;