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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kkovali | 10 Jun 18:13 2012
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Loading a 16 bit grayscale image

I'm trying to read a 16 bit grayscale image using OpenCV 2.4 in Python, but it seems to be loading it as 8 bit.

I'm doing:

im = cv2.imread(path,0)
print im

[[25 25 28 ...,  0  0  0]
[ 0  0  0 ...,  0  0  0]
[ 0  0  0 ...,  0  0  0]
..., 

How do I load it as 16 bit? 

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Mahdi Sheida | 10 Jun 14:19 2012
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Laplacian of the Gaussian



Hi, How can I use OpenCV to do :
A Laplacian of the Gaussian (LoG)
Can  please suggest something. 
Thanx in advance 




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jac30851 | 8 Jun 01:44 2012
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OpenCV Image conversion issue.



I have a socket connection where a jpeg has come through as an AMF bytearray. I have the data in a string right now and when I save out the string, it saves perfectly as a jpg, formatted and all. However, when I try to take the string or char and convert it into aMat or IplImage it comes back as being formatted incorrectly.

How can I convert my jpeg string into an IplImage/Mat?

Here's the basic snippet of what I'm doing which should work but comes back wrong when I try to use the Mat.

string myImgString = (string)ev.getParams()["data"];//The image as string
vector
<char> imgStringVector(myImgString.begi n(), myImgString.end());
vector
<uchar> imgStringVectorUnsigned(myImgString.begin(), myImgString.end());
Mat myIMG = imdecode(Mat(imgStri ngVectorUnsigned), 0);


// ---SIDE TEST TO SEE THE IMAGE GET SAVED PROPERLY WHICH WORKS--------------///
ofstream outfile
;
outfile
.open("imageTest.jpg");
outfile
<< myImgString << endl;
outfile
.close();
// ----------------------------------------------------------------//


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bearti11 | 8 Jun 15:16 2012

Problem with cvLoadImage

Hi!

I´ve a problem with the "cvLoadImage" function.
I make a photo with my playbook in JPG-format and on depth of 24bit.
Now i want to read this photo via:

"IplImage* src = cvLoadImage(img_path, CV_LOAD_IMAGE_COLOR);"

But this don´t work. Is it possible that the bit-depth is the problem?

what can i do?

Thanks

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supadoggy | 8 Jun 16:31 2012
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Laser Scanner Calibration

Hello,

I have a 3D laser scanner (Minolta VI-700) that ultimately outputs a .ply file with a point cloud of the
scanned object. The problem is that the object described in the ply file is smaller than the one in reality.
I'm a bit stuck because this is slightly different to normal camera calibration due to the additional
depth variable on only one camera. Could someone help me out here, please?

Thank you,
Ziggy

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Jon | 9 Jun 02:45 2012
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OpenCV 2.4 error

I have been trying to get OpenCV 2.4 to work with Visual Studio 2010 on Windows 7, 64 bit, as per the
instructions on

http://docs.opencv.org/doc/tutorials/introduction/windows_install/windows_install.html#windowssetpathandenviromentvariable 

and 

http://docs.opencv.org/doc/tutorials/introduction/windows_visual_studio_Opencv/windows_visual_studio_Opencv.html#windows-visual-studio-how-to

The instructions in the first link seem to work out just fine (though some buttons are missing in
Contours.exe, which I assumed might be because I skipped the extras in step 5). The final testing step in
the second link, however, gives me these two errors:

error LNK2001: unresolved external symbol_mainCRTstartup
error LNK1120: 1 unresolved externals

I do not know where to go from here and am wondering what I could be missing. The instructions are not that
clear as to what to do in Visual Studio 2010 (as in some of the options that are mentioned do not seem to exist
in the 2010 version), so the problem may stem from those options being improperly configured. Thank you
all for your help and your patience in reading this and figuring it out. It seems to be a basic problem, so I do
not think that it will cause much trouble for anyone to find a solution for - I just do not seem to be able to
figure out what might be missing.

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OpenCV 2.4 with Qt Enhancements AND full Qt

I moved up to 2.4 and saw the same issue as reported in Bug #1890.  Many of the Qt features work, but not the
enhanced sliders or buttons.

I tried both debug and non-debug versions of highgui  When I use the non-debug dll's I also see strange
behavior in cv::addText.  The strings passed get prefixed with extra characters for some reason.  So, I'm
just sticking with the debug dlls for now.

I don't see any discussion about these issue or plans to fix in future releases.  The Qt features have been
labeled "experimental". Will they be maintained in future releases?

I've been planning to "bite the bullet" and learn Qt anyway, so I can get a better Gui implementation than
what's possible with highgui.  Since the Qt support in 2.4 seems at least partially broken, I figure others
might be interested in my progress.

So far, I've using Qt Designer in Visual Studio 10 to create a main window and launch my multi-threaded
openCV application from that GUI. I'll add buttons and sliders under menu items accessible from the
MainWindow widget.

I'm already taking care to limit Qt calls to the main thread only.  I want strict control of when GUI events are
processed, so it works well for them to be processed only when cvWaitKey calls are made.

So far, I've seen no additional issues.

I'm not sure if I'll change my applications threading mechanisms to use those provided by Qt.  Those were
tricky to debug, so I hesitate to mess with them.  Two threads run asynchronous to each other, but each must
communicate synchronously with the main thread. Someday I do want multi-platform support so that's
probably the way to go.

If anyone knows of why this won't work or major "Show Stoppers" (using full blown Qt with OpenCv 2.4 with Qt
enhancements), I'd appreciate hearing why.

Thanks,

Dave Thomas

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Sajjad | 9 Jun 17:51 2012
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OpenCV 2.4.1 installation problem

Hi,
I've downloaded OpenCV v.2.4.1 and tried to install it in Windows 7 and MSVS2008. I followed the "The OpenCV
Tutorials, Release 2.4.1" instructions but it didn't work. When I run the project a system error appears
and says "The program can't start because opencv_highgui241.dll is missing from your computer. ...."
but it exists!
Can anyone help me with this?
Thanks.

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Gmane