Find center and radius of fisheye image
Hi Guys, I have a video from a fisheye camera with an image like this. Dont mind the cutout of the person. :)  I would like to find the center and...
View Articleerror: No member named 'getMat' in 'cv::face::FaceRecognizer'
Hello im low on time. I need a quick solution to this. I'm using opencv 3.0 and trying to get eigenvalues from this Fisherface recognizer model: ****Mat eigenvalues =...
View ArticleLoad cv triangulate points()
Hi everyone, I am working on cv triangulatepoints(). I have keypoint values and projection matrix and I did tringulation using opencv function. But I could not able to load the points to point3d...
View Articlehaarcascade face detection for loop
In implementing haarcascade for face detection , after reading video file the following loop is used . I need explanation on how it works for exmaple what is the meaning of faces[i].x+faces[i].width,...
View ArticleInstall Opencv on FreeBSD 8.2
Hi everyone, I'm having a problem trying to install OpenCV in FreeBSD 8.2. I have done all steps in order to complete the installation and I've tried different versions of OpenCv but I'm still having...
View ArticleReading a water meter
Hello all, I would like your advice with the implementation of the following. We are creating an app which can take a picture of your water meter and fill in the meter reading as text on your mobile...
View ArticleCircle Detection
Hello! I try to get the center of circles using Hough Circle algoritm from https://github.com/Itseez/opencv/blob/master/samples/cpp/houghcircles.cpp but i need exactly coordinates .When i get those...
View Articleimread returns empty Mat
hello everyone, I have been working on OpenCV 2.4.7 with Visual Studio 2012 express edition for quite a long time and it was working without any flaws. I recently upgraded to OpenCV 2.4.9 and given...
View ArticleFinding Connected Components in Natural Color Images
I've been working on an application that extracts characters from natural images, i.e. color images with a lot of structure. Up to now I've been using Canny Edge Detector and the Stroke Width Transform...
View ArticleHow can I get a realtime screenshot to process?
I want to use realtime screenshots to get my program recognize what's on screen and act accordingly, say move the mouse or simulate keyboard events. I can definitely use a camera, but for one thing it...
View ArticleWhich VStudio version for pre-built?
Hi, I would like to use the prebuilt binaries for opencv 3.0. The documentation says, the latest Visual studio version must be used. So, is it VS 2015? Pardon me, but I have searched all over the...
View ArticleProgramm running on Win XP Intel Processor and don't on AMD Processor
Hi all, I'm new here and hope to get some help or at least a hint. I wrote a dll which is running on WIn XP with an Intel Processor, but it creates an error (defective plugin) on Win XP with AMD...
View ArticleUMat on Android Release?
I am porting to OpenCV 3.0 to explore the potential GPU acceleration. Various documents I read suggest one should change all instances of Mat to UMat. However, there doesn't seem to be the class UMat...
View ArticleMSB6006 Error when building OpenCV from source in VS2015
I'm following the instructions [here](http://docs.opencv.org/doc/tutorials/introduction/windows_install/windows_install.html) for compiling OpenCV 2.4.11 from source. I'm using Windows 7 and Visual...
View ArticleOpencv 3.0 + visual studio 2013 + CUDA + CMake
I've successfully compiled OpenCV 3.0 with CUDA 7 with Visual Studio 2013 makeing the solution with CMake for x64 architecture. I've notice that my *300.dll performances are slower than the already...
View ArticleSpectral Residual Saliency map output does not match actual implementation
The implementation of Spectral Saliency algorithm in the opencv extra module (StaticSaliencySpectralResidual::computeSaliencyImpl) does not generate a saliency map similar to that of the implementation...
View Articlemouse click and draw circle
Hi My topic is draw circle with mouse click method I click 3 points on the image and draw circle I have got a code for drawing circle with given three points but my code is not working this code for...
View ArticleUnknown CMake command "ocv_clear_vars"
CMake Error at CMakeLists.txt:62 (include): include could not find load file: cmake/OpenCVUtils.cmake CMake Error at CMakeLists.txt:64 (ocv_clear_vars): Unknown CMake command "ocv_clear_vars". when i...
View ArticleHow does solvePnP (iterative) initialize its solution
Documentation says that solvePnP uses iterative method by default. However iterative method needs an initial solution to work and it does not say how the solution is initialized. I would like to know...
View ArticleHow can I solve this error while making OpenCV?
I am trying to compile OpenCV but I get this error almost at the end of running make. [ 93%] Built target pch_Generate_opencv_videostab [ 96%] Built target opencv_videostab Linking CXX shared library...
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