dennyabrain | 12 Jun 07:56 2012
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Finding Orientation of a colored object



Hi,

I am trying to find the orientation (angle) of a colored object using OpenCV 2.4. My program detects blue colored objects successfully. I am using minAreaRect to find a RotatedRect that bounds that object. the angle attribute of this RotatedRect gives an angle between 0 and 90 degrees. But I want the object's orientation in the range of 0 to 360 degree. Can anyone tell me how I could do this.

Would shifting the origin to the center of image work?
I am attaching a picture of the output just to give you an idea - http://anarcissist.files.wordpress.com/2012/06/input.jpg

Thank you



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Somnath Mukherjee | 12 Jun 13:25 2012
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For Face Detection

HI All,
          I am using HaarClassifier in Open Cv for Face Detection ,
but I can not create Haar Cascade .xml file from an input image ,
please can any one help me regarding this problem, and tell me step by
step process in face  Detection

--

-- 
   Somnath Mukherjee
somnath.7.mukherjee <at> gmail.com

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pac0mo | 11 Jun 21:25 2012
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Haarcascade XML file description

Hi all, i'm working on a project where i have to use xml cascade files included in OpenCV
(haarcascade_frontalface_alt.xml, haarcascade_frontalface_default.xml, ...) in another
face-detection application written by me.
I searched the documentation in order to find how the values included in those xml files (especially
righvalue and leftvalue for each feature) are obtained and how they are related to the values mentioned in
viola-jones paper (alpha values).
Unfortunately i havent found any reference to them in the official documentation.

I found some discussion on StackOverflow regarding the issue:
http://stackoverflow.com/questions/978742/what-do-the-left-and-right-values-mean-in-the-haar-cascade-xml-files
and
http://stackoverflow.com/questions/4482123/whats-inside-a-haar-cascade-classifier
, but there are very different responses and none is really confirmed.

If someone could shed some light on the problem, i would be very grateful.

Thanks,
Giacomo

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gokhan.varlikli | 12 Jun 11:14 2012
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Character Recognition with C++

Hello ,

I am Gökhan new member of this group. I am studying computer engineering and i am at internship now.

Almost 3 weeks, i have been focusing open cv for my internship project.It is so enjoyable but little bit
complicated library. My project is to read video or image and recognize the words at there and get them to
write office word. 

I didnt reach result ,are there anyone to help me.Any link, any suggestion etc.

I am looking forward ur messages.
Thank you.

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Nabiha | 11 Jun 23:26 2012
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Calibrage de camera

bonjour, j'ai lu pas mal des documents sur le sujet de calibration ainsi que les discussions de ce forum,
mais j'ai trouvé un problème avec la détermination des points objectpoints et imagepoints de la
fonction 
double cvCalibrateCamera( const CvMat* objectPoints, const CvMat* imagePoints, const CvMat*
pointCounts, CvSize imageSize,
CvMat* cameraMatrix, CvMat* distCoeffs, CvMat* rvecs=NULL, CvMat* tvecs=NULL, int flags=0 ); 
j'ai pas trouvé des réponses pour ces questions,

_quelle est l'unité de coordonnées de points??
_sachant que j'ai les deux images de chessboard enregistrés sur l'ordinateur captées par la caméra à
calibrer, alors est il possible de déterminer les coordonnées 3D des objectpoints par la fonction reprojectImageTo3D()??

_ce instructions déterminent elles la disparité :

int Stereo::GetDisparity(IplImage *disp_map, CvPoint right)
{	
uchar disp_value;
disp_value = ((uchar*)(disp_map->imageData+disp_map->widthStep*right.y))[right.x];

return (int)disp_value;

} 
et merci d'avance pour votre aide 

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pattern | 12 Jun 10:22 2012
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Video file formats supported in OpenCV 2.4

Hallo All,
Previously, I used to use video files of ".avi" format in all my opencv programs. Now I wanna experiment
other formats. So I wanna know other video formats supported in OpenCV 2.4 (i.e. acceptable by
VideoCapture, and Video Writer functions). Sorry, if this issue was posted previously.
I am thankful for any help from you.

vielen dank,

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Imen | 11 Jun 12:53 2012
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changing code source

Hi. 
I want to change some lines in the code source of Opencv and specially in the file "blobtrackgenyml.cpp". is
that possible, and if so, how can I rebuild and generate the Opencv. 
I tried to this using Cmake-gui and visual studio 2008 but nothing changes. 

thanks for help

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IBA7T | 11 Jun 11:55 2012
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changing code source

Hi.
I want to change some lines in the code source of Opencv and specially in
the file "blobtrackgenyml.cpp". is that possible, and if so, how can I
rebuild and generate the Opencv. 
I tried to this using Cmake-gui and visual studio 2008 but nothing changes.

thanks for help

--
View this message in context: http://opencv-users.1802565.n2.nabble.com/changing-code-source-tp7580333.html
Sent from the opencv-users mailing list archive at Nabble.com.

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Imen | 11 Jun 12:55 2012
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changing code source

Hi. 
I want to change some lines in the code source of Opencv and specially in the file "blobtrackgenyml.cpp". is
that possible, and if so, how can I rebuild and generate the Opencv. 
I tried to this using Cmake-gui and visual studio 2008 but nothing changes. 

thanks for help

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aromanino81 | 11 Jun 12:05 2012
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cv::PatchGenerator generator

Can anyone help me? in my opencv Project, I use the cv::PatchGenerator generator object, today i have
update the open cv libraries from 2.2 to 2.4 and i have this error by the compiler:
`PatchGenerator' in namespace `cv' does not name a type.
This was implemented in features2d.hpp ,i search this but they disappear from features2d.hpp. Can Anyone
help me?
thanks

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aromanino81 | 11 Jun 12:06 2012
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cv::PatchGenerator problem

Can anyone help me? in my opencv Project, I use the cv::PatchGenerator generator object, today i have
update the open cv libraries from 2.2 to 2.4 and i have this error by the compiler:
`PatchGenerator' in namespace `cv' does not name a type.
This was implemented in features2d.hpp ,i search this but they disappear from features2d.hpp. Can Anyone
help me?
thanks

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Gmane