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Questions tagged [highgui]

A module of OpenCV, the graphical and computer vision library, that provides high ordered features related to GUI(Graphical User Interface).

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ld can't find opencv highgui symbols (undefined reference)

I have a program correctly compiling and working on a machine and I'm trying to run it on another similar machine: same OS (Debian Stretch), same related packages installed, and same version of opencv (libopencv-dev version: 2.4.9.1+dfsg-2).…
Perdu
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Ubuntu 14.04 LTS: How to install OpenCV highgui module

I am trying to install the highgui module of opencv so that I can get a Qt Creator project to run properly. However, continued searching of the internet has yielded absolutely nothing. The project was originally configured to run using version 2.3…
Coliwack
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Why do I get this error when using OpenCV? error: undefined reference to `cvCreateFileCapture'

I'm trying to run a simple code using openCV but I keep getting this errors. error: undefined reference to `cvCreateFileCapture' error: undefined reference to `cvQueryFrame' error: undefined reference to `cvReleaseCapture' As far as I know these…
whoAmI
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highgui and videocapture libraries missing in OpenCV 3.0

I was trying to compile OpenCV 3.0 in java netbeans but there was an error: package org.opencv.highgui does not exist After a bit of research I came to know the jar file of OpenCV 3.0 doesn't include highgui. Can anyone help me what should I do if…
the_unknown_spirit
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OpenCV VideoCapture.open() keep changing indexes

I'm trying to open my usb camera on my Raspberry Pi using the following code: VideoCapture capture; capture.open(0); The code can work perfectly one time but after running it again later I get: HIGHGUI ERROR: V4L: index 0 is not…
DMEM
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Android - Template Matching

I want to create an android application. Program steps are below Open camera Get frames Select a frame by touch screen Load template image under drawable folder Apply template matching Show result The mat object of template image is not empty. I…
zakjma
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Highgui V4L error when using MJPEG for OpenCV

I am running OpenCV on an ARM A9 processor. I am trying to use MJPEG so my C920 webcam runs a lot faster. The beginning of my program is as follows: VideoCapture cap(CV_CAP_ANY); cap.set(CV_CAP_PROP_FOURCC, CV_FOURCC('M', 'J', 'P',…
Stefan G.
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How to distinguish between click and double-click in opencv

In OpenCV, it seems a double-click action also triggers a single-click event. Here is a sample code. The single_click() is always called before double_click(). Is it possible to trigger double_click() without triggering single_click() first?…
Vince
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OpenCV's highgui in C++ Qt application

I am trying to combine OpenCV's webcam access and image display functions with Qt's Network capabilities (Qt 4.8.1 C++ console application using OpenCV 2.4.2 highgui). I am currently trying to avoid converting a cv::Mat to a Qt format and displaying…
handle
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cvCreateTrackbar() not working

i am building an app with openCV book for beginners. here is the code for the main.m file: #include #include int g_slider_position = 0; CvCapture *g_capture = NULL; void onTrackBarSlide(int pos){ …
orthehelper
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OpenCV ios project crash

i have build OpenCV framework for IOS and i am learning OpenCV from scratch, the framework compiled well and when i am running this code : IplImage *img =…
orthehelper
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