When I click on the Quality mapper I get an error window with the text 'The model has no vertex quality'. Could you help me here, please? Thanks a lot for sharing your knowledge
I know this is old, but if someone else is having this issue: You have to calculate a vertex quality first. In this example he uses the filter "Ambient Occulsion" with setting "per-Vertex". After execution you can see a new "Vert. Attr.", when you expand the mesh layer in the explorer on the right. Now each vertex posses a quality value, but it's not visible. That is what the Quality Mapper is for. There are a numerous of filters, that return a vertex quality. Note that "Face Quality" is a different property, that cannot be displayed by the quality mapper.
When you compute the Hausdorff distance between two meshes on vertices, there are point sets created (Sample Point and Closest Point). These contain the in information you need (quality and/or color). You can transfer these attributes back to your original mesh using the "Vertex Attribute Transfer" filter.
@@AHNT I have 2 skull stl files, one is pre-operative and one is post-operative.And I try to see a color map to check what we changed and how we changed things. First with the align tool, I superimpose them, and as I understand from your comment, I need to compute "Hausdorff Distance" or "Distance from reference mesh". But after that I couldn't find how to make color map. Can you help ?
@@sumermunevveroglu8858 Sure thing. You align the two meshes as good as you can, like you said. Then you apply the Hausdorff Distance on those two meshes. The Distances are stored as "vertex quality" on the sampled mesh (the first one you selected in the Hausdorff Distance filter). You can now visualize the vertex quality/distance on the sampled mesh by selecting the layer in the list on the righthand side and apply the the quality mapper (Edit > Quality Mapper), like you see in this video.
@@AHNT Thank you very much for your help. It worked! One last question. Do you have any idea about measurements. I mean, I get some values, do you think it is the change between stl files in millimeters ?
Very useful!!! Thanks for the tutorial.
When I click on the Quality mapper I get an error window with the text 'The model has no vertex quality'. Could you help me here, please? Thanks a lot for sharing your knowledge
I know this is old, but if someone else is having this issue: You have to calculate a vertex quality first. In this example he uses the filter "Ambient Occulsion" with setting "per-Vertex". After execution you can see a new "Vert. Attr.", when you expand the mesh layer in the explorer on the right. Now each vertex posses a quality value, but it's not visible. That is what the Quality Mapper is for.
There are a numerous of filters, that return a vertex quality. Note that "Face Quality" is a different property, that cannot be displayed by the quality mapper.
Great video, thank you! Do you know by any chance how to export the histogram values to e.g. Matlab/Excel?
Very informative video. I wonder how to colorize the difference between two meshes: Hausdorff distance?
When you compute the Hausdorff distance between two meshes on vertices, there are point sets created (Sample Point and Closest Point). These contain the in information you need (quality and/or color). You can transfer these attributes back to your original mesh using the "Vertex Attribute Transfer" filter.
@@AHNT I have 2 skull stl files, one is pre-operative and one is post-operative.And I try to see a color map to check what we changed and how we changed things.
First with the align tool, I superimpose them, and as I understand from your comment, I need to compute "Hausdorff Distance" or "Distance from reference mesh". But after that I couldn't find how to make color map. Can you help ?
@@sumermunevveroglu8858 Sure thing. You align the two meshes as good as you can, like you said. Then you apply the Hausdorff Distance on those two meshes. The Distances are stored as "vertex quality" on the sampled mesh (the first one you selected in the Hausdorff Distance filter). You can now visualize the vertex quality/distance on the sampled mesh by selecting the layer in the list on the righthand side and apply the the quality mapper (Edit > Quality Mapper), like you see in this video.
@@AHNT I will try and let you know !
@@AHNT Thank you very much for your help. It worked!
One last question. Do you have any idea about measurements. I mean, I get some values, do you think it is the change between stl files in millimeters ?
Hi,
Is there a way I can know the distance between 2 meshes in +ve and -ve values rather than just absolute differences?