gameguy326 | 23 Jul 23:10 2012
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Difficulty using features2d module

Hi all,

I'm trying to use OpenCV 2.40 on Windows 7 x64 Release, Visual Studio 10.

I'm able to use core functionality, such as the Mat datatype, imshow, namedWindow, etc.

When I try to use the features2d module, I run into trouble.

These are my includes:
#include <opencv2/core/core.hpp>
#include <opencv2/highgui/highgui.hpp>
#include <opencv2/imgproc/imgproc.hpp>
#include <opencv2/features2d/features2d.hpp>
#include <opencv2/highgui/highgui.hpp>
#include <opencv2/calib3d/calib3d.hpp>

These are my Additional Include Directories:
C:\OpenCV\opencv\build\include

These are my Additional Library Directories:
C:\OpenCV\opencv\build\x64\vc10\lib

And these are my additional dependencies:
C:\OpenCV\opencv\build\x64\vc10\lib\opencv_calib3d240.lib
C:\OpenCV\opencv\build\x64\vc10\lib\opencv_calib3d240d.lib
C:\OpenCV\opencv\build\x64\vc10\lib\opencv_contrib240d.lib
C:\OpenCV\opencv\build\x64\vc10\lib\opencv_contrib240.lib
C:\OpenCV\opencv\build\x64\vc10\lib\opencv_core240.lib
C:\OpenCV\opencv\build\x64\vc10\lib\opencv_core240d.lib
C:\OpenCV\opencv\build\x64\vc10\lib\opencv_features2d240.lib
(Continue reading)

artur.lugmayr | 24 Jul 01:47 2012
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2 WEEKS LEFT - 5th Nokia Ubimedia MindTrek Award Competition - 6.000 Euros Award Sum

---------------------------------------------------------------------------------

            The 6th Nokia Ubimedia MindTrek Awards Competition - NUMA2012

                 EXTENDED DEADLINE 6th AUGUST on: http://www.numa.fi 

                 Call for the best UBIMEDIA, PERVASIVE, AMBIENT MEDIA
                  ... products, services, applications, concepts...

      Check out previous years' entries on: http://www.ambientmediaassociation.org

                         The total AWARD SUM: 6.000? 

---------------------------------------------------------------------------------

NUMA2012 seeks for novel ways to combine ubiquitous computing to media. We are 
looking for disruptive artistic visions as well as clever near-to-market 
solutions off the beaten tracks! This includes any range of innovative ubimedia, 
pervasive, or ambient products and services. The Nokia Ubimedia MindTrek Awards 
is a highly interdisciplinary competition and we invite Designers, Computer 
Scientists, Artists, Economists and Engineers to take a stand on one of the 
following questions with their entries:

// What is the aesthetic experience opened up by the rise of ubiquitous and ambient media?
// What constitutes the specific intelligence that drives future media environments?
// How will location- and context-aware media services change our social life?
// How will our future lives look like in the era of ubiquitous computation?
// How can society as a whole benefit from these advanced technologies?

Valid competition entries include:
(Continue reading)

dmitryponv | 24 Jul 02:41 2012
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uselessness of Hough Circles and Lines algorithms in openCv

Good afternoon,
I'm trying to run a Hough circle detection algorithm from EmguCV but I cannot get the accumulator values for
each circle from the algorithm. So what it does is find a a number of circles in the image and get me their
radii, position, and for some unnecessary reason the area, but it will not output the accumulator value of
each circle. This way I cannot tell which circles are better detected than others. It's the same issue with
hough lines. 
Because of this, I can only use the algorithm by starting at an accumulator threshold high enough not to
detect any circles and decrement it until 1 or 2 circles appear, having to re-run the algorithm many times
more than needed.

The only other option i have is editing the OpenCV sources until I get the accumulator values with the circles.

Same issue has been documented here:
http://stackoverflow.com/questions/3265987/opencv-get-hough-accumulator-value

Why is it this way? I know this is not an EmguCV issue, because cvHoughCircles doesn't return the
accumulator values either.

Thanks,
-Dmitry

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aravind_livewire | 24 Jul 18:01 2012
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Sixth sense using opencv..

I have seen a video on youtube Sign Language Recogniton http://www.youtube.com/watch?v=cxHMgl2_5zg , I
am really impressed . I am trying to implement it my project as a part using Open cv in python  could you please
show me the link and reference to the project . I will send it to you once its done.
I am trying to do this for a open source implementation of Pranav Mistry's sixth sense .
http://www.youtube.com/watch?v=YrtANPtnhyg heres the link.

I would really like to know how you used SVM in this project ... (i just couldnt figure how to use it)That  all .
And by the way thanks in advance .... ;-)

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Seereen Noorwali | 24 Jul 21:50 2012
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SIFT in avi videos



Hi everyone 

I am trying to write a code that apply SIFT on avi videos ... 
I can apply SIFT on a single image , but I do not know how can I do it in the videos ...

any suggestions will be so appreciated

Thanks in advance 
Seereen  


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levent bal | 24 Jul 23:46 2012
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metal surface smoothness measurement




hello,

how can i measure a metal surface smoothness?. it is very important for me. i couldnt find a function for it.

thanks for ur answers




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SIVA | 25 Jul 06:42 2012
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Computer vision job opening in a start-up



We are a start-up based in Hyderabad, India. We are working on the next generation software products. We are looking for experienced(2+years) professionals in computer vision space to work with us. Attractive packages will be given.

Qualifications

- Strong background in C/C++ programming.
- Familiarity with image processing libraries (Matlab) or vision libraries (OpenCV).
- Practical experience with image seg mentation, feature extraction and 3D reconstruction preferred


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prashantbox12 | 25 Jul 08:01 2012
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Algorithm for image rotation at different angle other than multiple of 90

Sir, I am working on a class project on image processing. Task is to rotate the image at specified angle i have
done the rotation of image at the multiple of 90degree but not getting idea how to rotate image at other
angles. Please help me out.

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Apostolis Glenis | 25 Jul 13:59 2012
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[GPU]visualisation of the corner detection algorithm



Hi all,
I am trying to use the harris corner detection and visualise the results.
The cornerness seems to work but i cant visualise  the results.
Also the code takes 13 seconds to initialise which is a bit weird (Is there any JIT compiling going on?)

The code is the following:

#include <iostream>
#include "opencv2/opencv.hpp"
#include "opencv2/gpu/gpu.hpp"


int main (int argc, char* argv[])
{
    try
    {
        cv::Mat src_host_or = cv::imread("checker_board2.bmp", CV_LOAD_IMAGE_COLOR);
    cv::Mat src_host;
    src_host.create(src_host_or.rows,src_host_or.cols,CV_8UC(3));
    cv::cvtColor(src_host_or, src_host, CV_BGR2GRAY);
        cv::gpu::GpuMat src,cornerness;
        src.upload(src_host);


    int blockSize=9;
    int k=0.04;
    int ksize=9;

    cv::gpu::cornerHarris(src,cornerness,blockSize,ksize,k);

    double max_cornerness,minVal;

    cv::gpu::minMax(cornerness, &minVal,&max_cornerness);
    std::cout<<"max cornerness is "<<max_cornerness<<std::endl;
        cv::Mat cornerness_host;
    cornerness.download(cornerness_host);
    int height=src_host.rows;
    int width=src_host.cols;
    if(src_host_or.isContinuous())std::cout<<"everything is good "<<std::endl;    
        for (int i=0;i<height;i++)
        {
          const unsigned char* ptr_cornerness = cornerness_host.ptr<unsigned char>(i);
           unsigned char* ptr_src_host = src_host_or.ptr<unsigned char>(i);
           unsigned char* ptr_src_host2 = src_host_or.ptr<unsigned char>(0);
              for (int j=0;j<width;j++)
             {

                if ( ptr_cornerness[j] > 0 )
                 {
                    float w = ptr_cornerness[j] /(float) max_cornerness;
                    //std::cout << "relative cornerness: " << w << "\n";
                    ptr_src_host2[3*(i*width+j)] = 255 * w + ( 1-w ) * ptr_src_host2[3*(i*width+j)];
                    ptr_src_host2[3*(i*width+j)+1] *= (1-w) ;
                    ptr_src_host2[3*(i*width+j)+2] *= (1-w);
                 }
                
            }
        }
   
   
        cv::imshow("Result", src_host_or);
//     cvSaveImage("cc.png", &(cvArr)src_host_or);

        cv::waitKey();
    }
    catch(const cv::Exception& ex)
    {
        std::cout << "Error: " << ex.what() << std::endl;
    }
    return 0;
}


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Vadim Pisarevsky | 25 Jul 17:20 2012

http://code.opencv.org migrated to new server and code repository



Greetings, dear OpenCV users!

We would like to inform everybody who already enjoys using our developer zone site at http://code.opencv.org or plans to do so that we migrated to the new much more powerful server (that is accessible at the same URL).

On http://code.opencv.org we now use Chiliproject instead of Redmine. You can use the same old login and password. Please, take some time to get yourself accustomed to the new look and feel of the site (it will be further improved soon).

Regarding the code repositories: the main OpenCV repository was transferred to git and is available at git://code.opencv.org/opencv.git. Repository history now begins with OpenCV pre 2.2 (around 2010 May). The older history plus matches between git commits and SVN revisions are stored at a separate OpenCV Attic repository: git://code.opencv.org/opencv_attic.git.

There is also a mirror of our main repository, opencv, at GitHub: https://github.com/itseez/opencv. We are going to organize the process of adopting pull requests a bit later.

OpenCV Extra, for whose who needs it, was put into a separate repo: git://code.opencv.org/opencv_extra.git.

Now we are working on modifying our continuous integration system to grab the code from git, but you can already take the latest code from GIT, as you previously did it with SVN. For Windows users there is popular Tortoise GIT program; Linux and Mac users could install the command-line git utility quite easily (run "sudo apt-get install git" on Ubuntu, install Xcode on Mac).


Yours, OpenCV dev team.

Oh, btw, on our main site, http://opencv.org, there is now "donate" button in the top-right corner. Feel free to use it, your money will help make OpenCV more solid, efficient and functional than ever.




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frondeur | 24 Jul 12:14 2012
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opencv with gpu crash in debug mode

Hi,

I am using opencv2.4.2 with visual studio 2010 build with cmake (CUDA
enabled). The problem is i consistently get a crash when accessing gpu
methods/initializations while being in debug mode. It works in release mode
although that too needs to be run outside visual studio otherwise some crash
occur. The exception that i receive is as follows:

First-chance exception at 0x76dbfbae in opencvGPUtest.exe: Microsoft C++
exception: cudaError_enum at memory location 0x00a3e258

The error is very consistent, and i have seen couple of examples over the
internet with others
(http://tech.groups.yahoo.com/group/OpenCV/message/77905). It is very
difficult to work without debug support while working with large projects,
so kindly help me fix this.

Thanks,

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View this message in context: http://opencv-users.1802565.n2.nabble.com/opencv-with-gpu-crash-in-debug-mode-tp7581077.html
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Gmane