Hi All,
Could you please expali how to use cvFindHomography? It would be good if you can show me some example where cvFindHomography is used for somethin other than chessboard callibration. I have a object in the image like "L" with five specific markers in it. I need to calculate the translation and rotation matrix with respect to the camera. Could you suggest few ideas please? I have added a sample image in http://picasaweb.google.de/sarf123456/SamplePics# Thanks in advance. Regards Sarfraaz |
Look at findobject.c example in OpenCV samples folder... it is the best
bay to understand it :) Walter sarfraaz ha scritto: > > > Hi All, > > Could you please expali how to use cvFindHomography? > It would be good if you can show me some example where > cvFindHomography is used for somethin other than chessboard > callibration. I have a object in the image like "L" with five specific > markers in it. I need to calculate the translation and rotation matrix > with respect to the camera. Could you suggest few ideas please? > > I have added a sample image in > > http://picasaweb.google.de/sarf123456/SamplePics# > <http://picasaweb.google.de/sarf123456/SamplePics#> > > Thanks in advance. > > Regards > Sarfraaz > > [Non-text portions of this message have been removed] |
Hello,
I had a look in find_obj.cpp butin thet example we need to give two image inputs. In mycase i just have the 2D projection of the image but i need to find the rotational and translational matrix from that. Please help me with this. Thanks in advance. Regards Sarfraaz --- In [hidden email], Walter Alex Lucetti <w.lucetti@...> wrote: > > Look at findobject.c example in OpenCV samples folder... it is the best > bay to understand it :) > > Walter > > sarfraaz ha scritto: > > > > > > Hi All, > > > > Could you please expali how to use cvFindHomography? > > It would be good if you can show me some example where > > cvFindHomography is used for somethin other than chessboard > > callibration. I have a object in the image like "L" with five specific > > markers in it. I need to calculate the translation and rotation matrix > > with respect to the camera. Could you suggest few ideas please? > > > > I have added a sample image in > > > > http://picasaweb.google.de/sarf123456/SamplePics# > > <http://picasaweb.google.de/sarf123456/SamplePics#> > > > > Thanks in advance. > > > > Regards > > Sarfraaz > > > > > > > [Non-text portions of this message have been removed] > |
sarfraaz wrote:
> Hello, > > I had a look in find_obj.cpp butin thet example we need to give two image inputs. > > In mycase i just have the 2D projection of the image but i need to find the rotational and translational matrix from that. Please help me with this. It's not part of OpenCV, but it's possible: http://citeseer.ist.psu.edu/triggs98autocalibration.html The paper includes a small snippet of MATLAB code for the difficult bit.. Samuel |
The method uses more than five views,
but i have just one view. would it be posssible to find the rotation and translation parameters?? 2009/9/28 Samuel Audet <[hidden email]> > > > sarfraaz wrote: > > Hello, > > > > I had a look in find_obj.cpp butin thet example we need to give two image > inputs. > > > > In mycase i just have the 2D projection of the image but i need to find > the rotational and translational matrix from that. Please help me with this. > > It's not part of OpenCV, but it's possible: > http://citeseer.ist.psu.edu/triggs98autocalibration.html > > The paper includes a small snippet of MATLAB code for the difficult bit.. > > Samuel > > [Non-text portions of this message have been removed] |
In reply to this post by Samuel Audet
The method uses more than five views,
but i have just one view. would it be posssible to find the rotation and translation parameters?? --- In [hidden email], Samuel Audet <samuel.audet@...> wrote: > > sarfraaz wrote: > > Hello, > > > > I had a look in find_obj.cpp butin thet example we need to give two image inputs. > > > > In mycase i just have the 2D projection of the image but i need to find the rotational and translational matrix from that. Please help me with this. > > It's not part of OpenCV, but it's possible: > http://citeseer.ist.psu.edu/triggs98autocalibration.html > > The paper includes a small snippet of MATLAB code for the difficult bit.. > > Samuel > |
In reply to this post by sarfraaz ahamed
This could help:
http://webdiis.unizar.es/~csagues/publicaciones/05JRS-cp.pdf sarfraaz ahamed ha scritto: > > > The method uses more than five views, > but i have just one view. > would it be posssible to find the rotation and translation parameters?? > > 2009/9/28 Samuel Audet <[hidden email] > <mailto:samuel.audet%40gmail.com>> > > > > > > > sarfraaz wrote: > > > Hello, > > > > > > I had a look in find_obj.cpp butin thet example we need to give > two image > > inputs. > > > > > > In mycase i just have the 2D projection of the image but i need to > find > > the rotational and translational matrix from that. Please help me > with this. > > > > It's not part of OpenCV, but it's possible: > > http://citeseer.ist.psu.edu/triggs98autocalibration.html > <http://citeseer.ist.psu.edu/triggs98autocalibration.html> > > > > The paper includes a small snippet of MATLAB code for the difficult > bit.. > > > > Samuel > > > > > > [Non-text portions of this message have been removed] > > [Non-text portions of this message have been removed] |
In reply to this post by sarfraaz ahamed
sarfraaz ahamed wrote:
> The method uses more than five views, > but i have just one view. > would it be posssible to find the rotation and translation parameters?? Yes, but only if your camera is already calibrated... read the paper! Samuel |
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