Detect sub-image(Irrespective of scale/angle) and crop that part from main image
Hi everyone, This is the issue of matching two images, one is the smaller one and other (main) image is the larger one. Here, i see it can be done by Template Matching, but template matching cannot be...
View ArticleCan not build contrib text-module
Hi. Please apologize for my english. Here is the problem: I'm using MS Visual Studio 2012 on Windows 7 64 (x86 proc). I have troubles with installing (building) text-module. I used...
View ArticleOpenCV was not initialized correctly
I am using snapdragon 820 processor to do android development. When I tried to install the samples it gave this error. I checked my OpenCV manager version it matches the device which is arm-v7a-neon...
View ArticleDetecting 'anomalies' in structured / textured image
Given a textured or a structured image, how can I localize anomalous segments ? For example a large crack or graffiti or just things that do not match well to the pattern (even a window like in the 3rd...
View ArticlePixel prime number.
 I want to find error between white position and white arrow. It's difference will be integer. But i want to know exact error like prime number. Is...
View ArticleGeneral People Cascade Classifier
Hello, I'm training a Haar Cascade Classfier to identify people based on a set of samples. It works with the people from the pictures, but how can I assure that the classifier will work with different...
View ArticleWebcams work on linux but not windows
I have a program that analyses live video from a webcam. All webcams I have tried on windows do not work but the same webcams work on linux with no problem. The issues I have on windows range from...
View Articleis there a way to display which camera opencv is using
As in, can it show which usb or onboard camera is currently in use ?
View ArticleSegmentation fault using OpenCV with Node.js
Hello, I am trying to detect faces on a series of images in a node script and I am getting a segmentation fault. This is the output of the console when the error occurs: OpenCV Error: Bad flag...
View ArticleMatrix Multiplication Values Not Correct
Matrix multiplication..... So i am converting some Opencv code to Opencvjs and i cannot get the correct matrix multiplication result. In C++ which appears to work. cv::Mat translation = -rotation * S;...
View ArticleAre there any ways to generate a HAAR cascade faster?
The current version of opencv train cascades seems to be single threaded other than precalculation steps and very very slow. I'm wondering if: a) there's any GPU accelerated version of...
View Articleerror with cv2.face.mindistancepredictcollector()
i have installed opencv 3.1.0 with extra modules. but when i try to use >>> s = cv2.face.MinDistancePredictCollector() it returns an error Traceback (most recent call last): File "", line 1,...
View Articlewhat's wrong with this
// Open a video file for writing (the MP4V codec works on OS X and Windows) cv::VideoWriter out("Motion", CV_FOURCC('m','p', '4', 'v'), FPS, cv::Size(width, height)); if(!out.isOpened()) { std::cout...
View ArticleWhere to find example for OpenCV on Android
Hi, OpenCV on android is quite different from the C++ version. Data in method are not the same. The vector as change to Mat. So it is quite difficult to use it without any documentation on the use of...
View ArticleTrouble setting up OpenCV with NDK in Android Studio
Hi, I would like to use OpenCV with the NDK in my Android Project. I am using Android Studio. I can't get it to compile properly. I am getting error while including opencv2 in my cpp file..... ** I...
View Articleestimating fwd motion
--Have a camera on a cart pointed straight down at ground (from a few feet)...need to estimate the forward speed (fwd direction only) as the cart moves straight along over dirt, rocks, lawn etc
View ArticleSkeleton_triple-points
I've a question about the skeletonization forms, have you an idea on how to detect the triple points and the junction in order to remove them, the aim is to calculate the length of segments inside a...
View ArticleIs there a way to import a RapidMiner MLP-ANN in OpenCV?
I trained and validated a MLP Model in RapidMiner Studio. My Input Values are already normalized to [-1, 1]. As far as I understood, the MLP is already defined by its weights. As you can see here, the...
View Articleshow the intermediate MAT in Android
Hi, On android we need to do this : Mat rgba = inputFrame.rgba(); // get the full picture Mat rgbaInnerWindow = rgba.submat(0, height, 0, width); // Procces it Imgproc.cvtColor(rgbaInnerWindow,...
View Articlehow to setup windows universal app using open cv
hi, i want to design a windows universal app using opencv how to step all things.
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