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Question regarding thinning out point clouds

  • Sep 16, 2021 9:13 AM UTC
  • 3 replies
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eriblan
Contributor
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Hi! I need to thin out a uniform(?) point cloud where the points are spaced out evenly, the result should also be spaced out evenly. I tried the PointCloudThinner but it does not seem to do what I want. See attached pictures. The circled objects are the ones that need to be removed. I Hope I explained the problem clearly enough😊 punkter2punkter

Best answer by itsmatt

If the points are aligned to a grid and are integers (e.g., x and y do not have decimals) then you can try this option.

filterThe unfiltered result should contain what you want.

 

This works by just filtering out all the points (x or y) which are even and keeps the odd points.

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3 replies

itsmatt
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  • Best Answer
  • Sep 16, 2021 11:43 AM UTC

If the points are aligned to a grid and are integers (e.g., x and y do not have decimals) then you can try this option.

filterThe unfiltered result should contain what you want.

 

This works by just filtering out all the points (x or y) which are even and keeps the odd points.


itsmatt
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  • Celebrity
  • Sep 16, 2021 11:46 AM UTC

Another option is to force to a raster (you could try the NumericRasteriser) here you can specify cell spacing. Just pick twice the spacing of the point cloud. Next step is the then pass the raster through a PointCloudCombiner which will turn it back into a PointCloud.


eriblan
Contributor
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  • Author
  • Contributor
  • Sep 20, 2021 8:50 AM UTC

Another option is to force to a raster (you could try the NumericRasteriser) here you can specify cell spacing. Just pick twice the spacing of the point cloud. Next step is the then pass the raster through a PointCloudCombiner which will turn it back into a PointCloud.

Thank you! I managed to solve the problem with the help of your input.