Search found 9 matches

by ripo
Thu May 28, 2015 1:59 pm
Forum: Questions
Topic: Mean distance with absolute value and Max relative error
Replies: 1
Views: 2539

Mean distance with absolute value and Max relative error

Hi Daniel, I have two question for you. 1. I have a point cloud with a fitted primitive. I used “compute cloud/mesh distance” and it show the “mean distance” from point cloud and primitive. This value is calculated with positive (above the primitive) and negative (under the primitive) distance compa...
by ripo
Wed Apr 15, 2015 9:09 am
Forum: Questions
Topic: Size Primitives
Replies: 3
Views: 1937

Re: Size Primitives

In previous release (I think 2.5.2) if I selected the plane in the properties appeared this type of information (width and lenght). Now there is only the box dimension of the plane and the center of this. Is or isn't possibile in 2.6.1? It is possible restore it or there is another method for know t...
by ripo
Tue Apr 14, 2015 9:45 am
Forum: Questions
Topic: Size Primitives
Replies: 3
Views: 1937

Size Primitives

Hi Daniel,
Sorry for a question, it is a stupid question, but I don't remeber it or I can't find it after new update. How can I get the size of a simple plane or primitive inserted by the software? For example x=3.51 and y=6.3.
Thank You Very Much!!!!
by ripo
Thu Apr 09, 2015 1:57 pm
Forum: Questions
Topic: Tools>Fit>Plane and RANSAC
Replies: 14
Views: 12444

Re: Tools>Fit>Plane and RANSAC

Is there a method in cloudcompare how the RANSAC algorithm accurately approximates the plan? I want to know the error that the algorithm RANSAC commits and the relative goodness of approximation between the plane and the point cloud.
by ripo
Wed Apr 01, 2015 1:50 pm
Forum: Questions
Topic: Tools>Fit>Plane and RANSAC
Replies: 14
Views: 12444

Re: Tools>Fit>Plane and RANSAC

I read some articles on RANSAC method. It is based on two kind of points: inliers and outliers. I have a question on the parameter "e" in plugin parameters dialog. Is the parameter "e" the size of "inliers box"? Or includes it outliers point so and in a second moment ma...
by ripo
Tue Mar 31, 2015 3:05 pm
Forum: Questions
Topic: Tools>Fit>Plane and RANSAC
Replies: 14
Views: 12444

Re: Tools>Fit>Plane and RANSAC

This is the problem. If I can understand which parameters are good, the problem is solved otherwise I have to change them. What do you mean by "good value"?
by ripo
Tue Mar 31, 2015 1:11 pm
Forum: Questions
Topic: Tools>Fit>Plane and RANSAC
Replies: 14
Views: 12444

Re: Tools>Fit>Plane and RANSAC

I try to set the parameters of RANSAC method in plugin parameters dialog. Each point cloud selected has a different set of parameters. For example a point cloud has automatically the parameter e=0.053 and another point cloud has e=0.045. Why are there different values? What causes different paramete...
by ripo
Mon Mar 30, 2015 8:16 am
Forum: Questions
Topic: Tools>Fit>Plane and RANSAC
Replies: 14
Views: 12444

Re: Tools>Fit>Plane and RANSAC

Thanks for the answer!
I would like to know how the software inserts the plane with "Fit" method. It uses a linear regression for example?
by ripo
Sat Mar 28, 2015 10:26 am
Forum: Questions
Topic: Tools>Fit>Plane and RANSAC
Replies: 14
Views: 12444

Tools>Fit>Plane and RANSAC

Hello Daniel, I’m using cloudcompare for my thesis and I have a problem. I have to find the best plane to fit a point cloud. The software allows you to use two methods (at least I think so): tools> fit> plane and RANSAC. My questions are: what is the difference between two commands? what criteria th...