Needing some help on integration of the webcam
Needing some help on integration of the webcam I am getting these errors on ubuntu 15 HIGHGUI ERROR: V4L2: Unable to get property (7) - Invalid argument HIGHGUI ERROR: V4L2: Unable to get property (5)...
View ArticleOpenCV 3.0 Missing files
Can anyone provide CLEAR instructions on how to build OpenCV on Windows x64 (in my case, Windows 10), using Visual Studio 2015 Express? I have downloaded the OpenCV 3.0.0 self-extractor file, unpacked...
View ArticleHow to determine if gamma decorrection is required?
I've read that OpenCV does not enforce its own version of the RBG color space (say sRGB or AdobeRGB) - this depends on the image capture device and/or image file format and `imread` will simply load...
View ArticleMissing HOG Cascade in Ver 3
It seems that opencv 3 no longer support HOG Cascade. Why is that? in cascadedetect.cpp: if( featureTypeStr == CC_HAAR ) featureType = FeatureEvaluator::HAAR; else if( featureTypeStr == CC_LBP )...
View ArticleOpenCv 3 and link problem
eigen_faces.cpp:-1: error: **undefined reference to `cv::LDA::subspaceProject(cv::_InputArray const&, cv::_InputArray const&, cv::_InputArray const&)'** eigen_faces.cpp:-1: error:...
View ArticleDivide an image into lower regions
Hi, I explain my problem, I have an image of MxN and I want ti create regions of lower dimensions. for example I want to divide the image into 4x2, so 8 regions I have the next code: # Numbers of rows...
View ArticleOpenCV4Android - balanceWhite?
Does OpenCV4Android have a balanceWhite function? I know it's contained in xphoto but I can't seem to find that in the Java API docs. I'm using OpenCV4Android 2.4.11
View ArticleCreating debug (static) libraries with CodeBlocks/MinGW
Hello, I've successfully used CMake to configure and generate a CodeBlocks/MinGW project for OpenCV. When I open up CodeBlocks, I am given many target options including "all". I am able to build "all",...
View ArticleOpenCV compile error
On Compiling opencv 2.4.11 on the ubuntu 14.04, I received the following error: - Linking CXX shared library ../../lib/libopencv_core.so /usr/bin/ld: skipping incompatible...
View Articleopencv 3.0 with contrib installation guide
Hi there, I've tried a few different methods in order to install opencv 3.0 gold WITH the opencv_contrib modules (I would like to use the tracking ones in particular), none of which seem to work. Can...
View ArticleProblems Building/Compiling OpenCV 3.0
Hello all, I downloaded OpenCV to my laptop earlier today in hopes of using it. I previously had v2.4.8 on my desktop and the whole 'no more prebuilt binaries for MinGW' has been causing me grief all...
View ArticleProblem building Opencv3.0 with IPP and TBB using mingwx64(4.8.1)
Hello, I got following error while building opencv3.0 with IPP(Inbuilt) and TBB(Open-source) using mingw x64 r2 sjlj 4.8.1 compiler in windows.  If...
View ArticleFrom which location does openCV2 capture the calibration file fo the camera?
I have already calibrated my camera and now wish to use the opencv2 library for ROS. However my program is not able to find the calibration file. Where should the camera calibration file should be saved?
View ArticleDo OpenCV's BundleAdjuster classes also adjust camera pose?
The documentation does not state that OpenCV's BundleAdjuster classes also adjust the camera pose of the input. From the code, however, it seems that steps are taken to adjust at least the rotation...
View ArticleIs there is a way to get what is the percentage of the correctness for the...
i.e Is there a way to get the confidence values in SVM prediction ?
View Articlecv::Mat assignment to Scalar
I am getting unexpected behavior for assigning the elements of a matrix--it seems the last element of the matrix is not assigned properly. The following is a minimum code example and output. typedef...
View ArticleWhats' the best way to speed up filtering a very large image by...
I'd like to perform Guassian filtering on a very large image (80,000 x 60,000) in memory using multiple cores. After some reading, I concluded that there are two possible route: 1) Using...
View Articlethe findTransformECC function in Opencv-3.0.0 returns a NaN as the ECC value
Hi, I am using findTransformECC function (*ecc.cpp*) from Opencv-3.0.0 beta version. I have build the libraries with Intel's Integrated Performance Primitives (IPP) libraries. I am using this for image...
View ArticleDetect cattle in drone video footage
I’m looking at using OpenCV to detect cattle within footage taken from a drone. Every time I get to the point of making a decision on what technique I should use I either read something contradictory...
View ArticleSignal processing to detect "jag-iness"?
 I have an industrial application where I am using a camera to measure the gap between two pieces of plastic. In the above image I have found the...
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