Error: fundamental matrix size overgrowing to 3x9
I am trying to find the fundamental matrix by manually identifying 7 corresponding points in two images and using the findFundamentalMatrix function. However on printing the matrix, it turns out to be...
View ArticleDetect real time face only
Hi, I am trying to detect real time face detection. I have run `face-detection-sample` but the problem is sample is also detecting the faces from images as well. `How can I setup Open CV to detect...
View ArticleAndroid application on the basis of facial emotion
I want to develop android app on the basis of facial emotion. app will perform some action on the basis of recognized user emotion e.g. play some song when user is happy. I develop an initial emotion...
View ArticleIP camera video corruption - solutions?
Has anyone been able to get an HD (720p or higher) IP camera working with OpenCV consistently and reliably? If so, did you use the standard VideoCapture interface or something else? Many OpenCV users...
View ArticleWhere to find string.h??
**fatal error C1083: Cannot open include file: 'string/string.h': No such file or directory**
View ArticleSave Image with saveFileDialog
Hi! I am new to OpenCv and C++. I word with Visual Studio 2013 and I want save an image with the saveFileDialog or with folderBrowserDialog from windows forms? Is that even possible? I tried this but...
View ArticleHow to use correctMatches to improve camera calibration accuracy
I am looking for information on how to use correctMatches() to improve any errors in the chessboard points found during calibration. I understand that this function determines the average epipolar...
View ArticleSuper Resolution gives error with CUDA or with TVL1
I tried running the super resolution OpenCV sample. I built OpenCV 3.0.0 with CUDA on my 64-bit machine. The function `cv::superres::createFrameSource_Video_CUDA` gives the following error OpenCV...
View ArticleChessboard and Circle calibration provide radically different results
I have a 35mm nominal focal length camera that I'm trying to calibrate using a PyQt front end I'm building onto OpenCV's python library. It finds and displays matched points. Everything works except...
View Articlerefcount attribute
Can anyone explain how exactly the refcount attribute is used in OpenCV structs? I am specifically looking at refcount in CvMat. I expected refcount to be used memory management, but looking at the...
View Articlestd::thread & imshow() - no windows created
Hi dears, First of all, thanks for your time :). I'm trying to create thread (yes I know, multi-thread is bad however I'd like to experiment) in which I would display an image. I have read OpenCV...
View ArticleBuild for Visual Studio 2015
Hello, Please could you help me - I'm struggling to get going with OpenCV. I'm having significant difficulties Building OpenCV 3.0.0 for Microsoft Visual Studio 2015 v14.0.24720.00 Following the steps...
View ArticleProblem with pyzo and opencv
Good morning everybody !! I'm working on ubuntu 14.04 LTS and I use pyzo for programing python. For my studies, I must use opencv, so I have instaled it but he doesn't work on pyzo but he work on an...
View ArticleSuccinct way to assign values to Mat
I want to assign values to a 4x3 `Mat` in C++. Right now, I'm doing it like this: Mat P = Mat(Size(4, 3), CV_64F); //Create matrix with four corners of output image P.at(0,0)=0;...
View ArticleWhere to find many uniform backgrounds to train a classifier?
I need to have a classifier to detect and recognize coins but all tutorials I have read up to know suggest as negative/background images this archive...
View ArticleC wrapper for C++ OpenCV
I am trying to integrate OpenCV into a large codebase (order of 100K lines) that I have. To do this ideally, I would like to create C wrappers to the OpenCV C++ interface, since the C interface to...
View ArticlePointer to cv::Mat and sizeof underlying structure
Hi, I have to use an interface which 'transmits' data between different execution units in a pipeline. The interface of the correspoding transmit function looks similar to this: transmit(TimeStamp...
View ArticleBuilding OpenCV 3.1.0 on Windows with viz3d
Hi, I tried to build opencv 3.1.0 from source on windows (windows 10, visual studio 2015, 64 bit), to get the viz3d module. I downloaded and build the vtk (I tried both 7.0.0 and 6.3.0). But I get the...
View Articlei found this program ,i would save the image after counter detection but i...
package com.example.essai; import java.io.File; import java.text.SimpleDateFormat; import java.util.ArrayList; import java.util.Date; import java.util.List; import java.util.Locale; import...
View ArticleFrame Grabber to use with VideoCapture()
Does anyone know if there is an hdmi to usb frame grabber or capture card that is compatible with opencv 3.0 videoCapture object? I'm on a windows machine and am trying to pull hd video from a gopro...
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