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Comparing Models, this is a feature of meshlab. there is a shot introdution in the web home of meshlab(http://www.meshlab.net/). but how ? there is none exmple. somebody can help me? give a exmple or a document, thanks a lot.
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In general, a model fits the data well if the differences between the observed values and the model's predicted values are small and unbiased. Before you look at the statistical measures for goodness-of-fit, you should check the residual plots.
The likelihood ratio test can be used to compare two models when one of the models is nested under the other. The likelihood associated with each of the models is equal to the probability with which the model would produce results that are identical to those produced by our observer.
In regression problems, mse or rmse is a way to identify how good your model is doing. Low rmse or mse is preferred. So, go with the model which gives the lowest mse or rmse value and try it on test data. Ensemble methods often give the best results.
There are two different ways to compare nested models using SPSS. Get the multiple regression results for each model and then make the nested model comparisons using the “R² change F-test” part of the FZT Computator. Use SPSS to change from one model to another and compute resulting the R²-change F-test for us.
As it has been mentioned in that short introduction, MeshLab compares two 3D models by calculating the Hausdorff distance between them. This option is available under Filters menu (Filters -> Sampling -> Hausdorff Distance). Before applying this filter, you need to open two 3D models in MeshLab and select them from drop down menu in filter options. By default the filter output will be logged in the MeshLab console on right-bottom corner (If it is not visible press Ctrl + L).
You can also compare 3D models in MeshLab by calculating per vertex geometric distance between them (Filters -> Sampling -> Distance from Reference Mesh). The distance will be stored as per vertex quality. You can visualize these distances by enabling Render -> Show Quality Contour or Render -> Show Quality Histogram.
Here is a two part article on the same topic from MeshLab author Paolo Cignoni (Part 1 and Part 2).
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