The function/feature is not implemented (Odd-size DCT's are not implemented)...
I've built a pre-processing script in OpenCV that takes user uploaded images as input. While trying to take DCT of an image, I get the following error > OpenCV Error: The function/feature is not...
View ArticleIs white pixels value in binary image 255?
Hi i wonder why white pixels value is 255? This is not intuitively.
View ArticleOpenCV for iOS - Linking Libraries in Xcode
Hi, as part of a team project I intend to implement obstacle detection for a robot using open cv. I am now at a point where I have functional code that runs on OS X and uses my laptop camera to detect...
View Articleatan on GPU
Hello, I am developing a function that does per-pixel operations on an image and there is a step where I have to compute the arctan (atan) for each pixel. I have not found any atan function for GPU...
View ArticleOpen Gopro hero wifi live streaming with VS C++
I saw some tutorials that they can open a Gopro hero wifi livefeed by its url with Videocapture function. Is it possible? if can open, is there any sample video tutorials for my reference? if cannot...
View Articlefind_split_cat_reg() implementation.
hello, I have a question about [this function](https://github.com/Itseez/opencv/blob/master/apps/traincascade/old_ml_boost.cpp#L552). It is supposed to find the best split of categorial variable. I am...
View ArticleC++ exception in cv::BFMatcher
I am having problems with the cv::BFMatcher when I try to perform the feature matching. I compute the descriptors with the xfeatures2D::SIFT descriptor. When I try to perform the matching the...
View ArticleException using UMat
Hi, I've got a system exception using following code when ocl::setUseOpenCL(true);. Can you check it? Thanks in advance #include #include "opencv2/imgproc/imgproc.hpp" #include...
View ArticleOpenCV 3.0.0 extern modules error
I am busy for days with OpenCV 3.0.0 + external module + OpenNI + cuda, but I cannot make it work. I tried it with vc10 + cmake and the git files. I can somehow sometimes generate it, but when i try to...
View ArticleMultithreading OpenCV GPU Crash
My multithreaded application (using C++, OpenCV 2.4.10, CUDA 5.2) crashes frequently, the debugger hangs always at a "cudaSafeCall( cudaDeviceSynchronize() );" call. But the "cudaDeviceSynchronize"...
View Articleimshow full resolution too slow
Hello forum, I have a video with an original resolution of 1920 x 1080. Original Image ( 1920 x 1080 ) Resized Image ( 960 x 540 ) On the first program, Background subtraction is done on the **Resized...
View ArticleOpenCL in 3.0 and Nvidia card
I am trying to run some of the **OpenCL** code examples with OpenCV 3.0, and have many problems when running on **Nvidia** card ("Quadro K2100M", in case it's important). Same examples run perfectly...
View ArticleMoment and Archlength return values - confused
Hello, I had used the moment coding together with the arch length [code](http://docs.opencv.org/doc/tutorials/imgproc/shapedescriptors/moments/moments.html) and found out the number do not match what...
View Articlebanana pi camera not working
I got a Banana Pi with the Banana Pi Camera. I would like to get a video stream with OpenCV. The Banana Pi runs current Bananian (uname: bananapi 3.4.104-bananian, lsb_release: Debian GNU/Linux 7.8...
View ArticleNeed dataset for: car, truck, bus, motorbikes
Hi, I need dataset for car, truck, bus, motorbikes. Pls share, thanks
View Articletrouble porting RGB2CMYK method from c++ to java
I am trying to convert a method from c++ to java. Here is the method: void rgb2cmyk(cv::Mat& src, std::vector& cmyk) { CV_Assert(src.type() == CV_8UC3); cmyk.clear(); for (int i = 0; i < 4;...
View ArticlePerformance GPU implementation on NVIDIA Jetson TK1
Hello, I recently have implemented a simple algorithm for GPU that works on the pixels of an image. It performs operations such as additions, subtractions, multiplications, divisions, max, split, merge...
View ArticleOpenCV-2.4.11
Dear friends MyFile.pro unix { CONFIG += link_pkgconfig PKGCONFIG += opencv } Note: Please help me? How do I get this package to the unix {} works. On the site took the opencv-2.4.11 sources, did...
View ArticleHow do I access Opencv-3.0.0's expectation maximization algorithm through Python
Hi, I am using Opencv-3.0.0 through Python 2.7.x on Ubuntu 14.04 LTS. I wanted to use the expectation maximization algorithm of Opencv. In Opencv-2.4.x the expectation maximization algorithm used to be...
View Articlehow to write two dimensional vector to file
I have two dimensional vector vector> test; I want to save it to file and read it back. I tried to write it to a FileStorage, but after I read it back, it became one dimension vector. Does anybody...
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