grab frames from camera buffer and display them in an image view using...
Hi, I am trying to make an app that shows camera preview, And i want to take frames of the shown preview and do on it processing. What is working is the camera preview,but I don't find any solution...
View ArticleWrite a text in dlib image
i'm using dlib for face detection and i would like to write a text in the image. Can you please help me.
View ArticleOpenCV4Android - Erode a Contour? Or some form of a distance transform?
So let's say that I have the contour of an object but I want to shave off the outer 5 pixels from the contour what would be the best way to do that? Some form of erosion? A distance transform? or...
View ArticleFisheye has been not declared in this scope error
I am trying to call cv::fisheye::undistortImage for removing distortion from image but in the compilation time its showing fisheye not declared in this scope . How to resolve this error? #include...
View ArticleSaving Image in new folder created during runtime.
I am creating a new folder with user defined name to it and I want to store image in that folder I tried this string foldername; Mat frame = imread("D:\\Sample\\ag.jpg", 1); cout << "Enter Name...
View ArticleCan I port python opencv project to android?
I want to work on an open cv project to be used on android but I have never built for android before, so this got me wondering if I can build the opencv project in python then port the project to...
View ArticleHow can I compile the evaluation.cpp in opencv?
[`evaluation.cpp`][1] contains an useful function for computing a detector through `evaluateFeatureDetector` and even `computeRecallPrecisionCurve`. **Any useful alternative to compute these metrics...
View ArticleHow to use Mikolajczyk evaluation for detectors/descriptors?
I want to compare different detectors/descriptors (**both binaries and not**) for my application and I want to use the [Mikolajczyk evaluation framework][1], which is became a standard in the...
View ArticleParallel Lines - Draw shortest connection line
Hello, I am currently facing a problem in one of my projects, I have 2 parallel lines, each defined by 2 QPoints and I want to draw the line and get the Points of the line that is the shortest and...
View ArticleProblem to set Visual Studio for OpenCV
I have followed the OpenCV guides for installation in Windows and setting of Visual Studio but I have problem if I understood all step correctly. The folder structure is different. My system is Windows...
View ArticleWhere are OpenCV 3.1 VC10 Windows x86 binaries?
I read the guide how to install the OpenCV but it is old and totaly confusing. In the files which I have extracted I cannot find any x86 dll for OpenCV, but some folders for 64 bit system and VC 12 and...
View ArticleCrop an non rectangle area
I want to crop a area which is not like rectangle using use OpenCV C++ with different 4 coordinates. or i want to color not selected region to get the selected area clear . Please tell me the solution...
View ArticleWhere to get MAT sources and how configure it for CMAKE?
I am new to OpenCV. I try to build OpenCV on Windows XP 32bit. I want to use MAT library because I plan to use this code...
View ArticleUsing the IR image as a mask for RGB image
I'm passing the RGB, Depth and IR image through from libfreenect2 to opencv, and I am having trouble working out how to use the the IR image as a mask over the RGB image to remove everything except...
View Articlei am doing project using opencv on raspberian wheezy (Linux) platform.Can...
I have two images, one source and one target. I want to get the histograms of both source and target. Finally match the histogram of target wrt source. The opnenCv method 'equalizeHist' does it for...
View ArticleImage Calibration Depth from RGB
Hi, I have a dataset where is a depth and rgb images taken by Kinect. And i have the information about bounding box on Rgb image, but not for depth, and this two sensor are not calibrate. I have also...
View ArticleGet a probability out of svm
I'm using SVM classifier and i did the training with 6 classes. Is it possible to get a probability when using an SVM in OpenCV? Thank you.
View Articleproblems with using Haar Cascade
I have problems with using Haar Cascade. I'd like to train каскад to find certain birds(Toucan) on the photos.. Cascade works if I just cut out Toucan with frame and background, but with bird it finds...
View ArticleOpenCV 3.1: cvflann::anyimpl::bad_any_cast
Hi there, I have an iOS project running OpenCV 3.1. I have this bit of code that crashes ONLY in debug mode. If I run this exact same code but change Xcode to run the project in release mode, the...
View ArticleHow to normalize image with opencv and java
I want to normalize an image using opencv and java before resizing it (changing size will make some changes in the image so i should normalized it this is the reason for choosing normalization).How...
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