Hi James

Thanks for your kindly reply! It's very helpful.

Now I have an another problem.. Yes the two lines are gotten by ransac, but the lines are not very accurate. Even there is no intersection, the two lines are just very closed. I got two points with getMinMax3D on one of these two lines and the third point on the other line as samples. But after using ransac_plane, the resultant plane is not exactly include these two lines.

Do you have any suggestion for fix this?

Thank you!