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Crop 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...

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Line detection and tracking algorithm for autonomous robot.

Hi there! I am wokring on an autonomous robot which has to run in a lane 2m wide with a yellow line marking the outer boundary and white line marking the inner boundary. What I have thought of is, that...

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How to find Delaunay Neighborhood of all the vertices in OpenCV.

Delaunay Neighborhood of a vertex is its immediate spatial neighbors in the Delaunay Triangulation i.e. the vertices which share an edge with that vertex. I wish to find Delaunay Neighborhood for all...

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Where 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...

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Using 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...

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parser.has() alway retruning true

Hello, I´m trying to use CommandLineParser and I have a problem : even if I don´t put anything when I lauch the program (only ./prog ), the function parser.has returns true, as if something was given...

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i 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...

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Image 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...

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Parallel version of SIFT?

I know that SIFT is considered (according to many paper) the most accurate detector & descriptor available. Btw, it's one the slowest solutions also. So, there is any parallel implementation...

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How to install and use pre-build opencv 2.4.13 for IOS on OSX El Capitan

I am trying to install opencv 2.4.13 for IOS to be used fir IOS project build in Xcode 7.3.1 I have downloaded opencv from here:...

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Lot os Issues in Xfeature 2D

error: no member named 'exp32f' in namespace 'cv::hal' cv::hal::exp32f(W, W, len); error: no member named 'magnitude32f' in namespace 'cv::hal'; did you mean 'magnitude cv::hal::magnitude32f(X, Y,...

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cudalegacy not compile -- nppiGraphcut missing

trying to build v3.1 opencv with cuda support. standard cmake. project of: opencv_cudalegacy and doing 'Build' 1>------ Build started: Project: opencv_cudalegacy, Configuration: Debug x64 ------...

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Get 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.

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problems 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...

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OpenCV 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...

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How 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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Suddenly cannot compile opencv applications, windows 10

I have been using openCv for a while, but have just moved to windows 10. Now, existing applications will compile, but I cannot make a new one. In a new project (visual studio 2015, release 64) I am...

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unable to read image using opencv-2.4.13

I have statically cross compiled opencv-2.4.13 for ARM. I use this command to compile my code : g++ cppcode.c -L/Desktop/opencvBuild -lopencv_highgui -lopencv_imgproc -lopencv_core...

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How to find the highest middle point in a flood filled image in opencv?

Hey I am new to OpenCV and Image Processing stuff and need help in order to find the highest middle point of a flood filled image or the highest middle point of a contour. These are the pictures of a...

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How to use Opencv 3 particle filter api

I have built the opencv_contirb for opencv 3.1, and I got the tracking module. The document : http://docs.opencv.org/trunk/dc/d75/classcv_1_1TrackerSamplerAlgorithm.html#gsc.tab=0 The 3.0 doc also...

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