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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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OpenCV Windows - The library is compiled without QT support in function displayOverlay

I'm getting the following error: python run.py OpenCV Error: The function/feature is not implemented (The library is compiled without QT support) in displayOverlay, file /build/opencv/src/opencv-3.4.0/modules/highgui/src/window.cpp, line…
João Cartucho
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OpenCV / HighGUI draws new windows for each attached object

I'm working through Learning OpenCV 3 by Kaehler & Bradski. I've applied all errata fixes to this code per http://www.oreilly.com/catalog/errata.csp?isbn=0636920044765. Expected behavior: the trackbar should be attached to the namedWindow…
frazbot
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OpenCV Failing to read from Video Capture Device

Long time listener, first time asker. Here is the situation: I'm trying to read frames from multiple opencv (python) video capture device using the .read() functionality. When using opencv 2.4.11 the following error occurs at random times: HIGHGUI…
Russell
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Assign a HWND to an OpenCV named window

I have a win32 child window handle from a win32 application and I want to draw my openCV stuff on that child window. Is there a way to set the HWND of an openCV named window. I only found a function cvGetWindowHandle to get the HWND of an already…
locke14
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'LNK1112: module machine type 'x64' conflicts with target machine type 'X86'

I am using visual studio 2012.i got the error LNK1112: module machine type 'x64' conflicts with target machine type 'X86'highgui248d.lib(opencv_highgui248d.dll)' while building a win32 console application. I have tried modifying the property to…
Prasrit Kumar
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Moving focus to console opencv c++

I have a c++ console application which creates an opencv window. I'm using cvWaitKey(1) in order to catch keyboard key presses. Here's what I would like to do: When the user presses the s key, I would like him to type-in something in the console.…
Idanis
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OpenCV 2.3.1 make highgui errors

I am attempting to build OpenCV 2.3.1 on a 64 bit OSX Mountain Lion machine and can't get past a particular set of "use of undeclared identifier" make errors. I have attempted to build both the taz.gz file and source from Git with the same…
Larry Hipp
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How to use opencv::highgui::get_trackbar_position

I just posted so recently but I'm new to rust and keep hitting walls with what I imagine is elementary for someone more documentation-literate than I am. I have been recreating my python code listed here while True: cv2.namedWindow("HSV") …
BioresearchCS
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How to implement HSV slider with OpenCV using BGR2HSV and opencv:highgui::create_trackbar in Rust

Please bear with me as this is my first post to stack overflow. I am attempting to learn rust with a fairly elementary background in OpenCV through python. In my original python script I could use createTrackbar() pretty easily but when converting…
BioresearchCS
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Opencv: false number of vertices of a circle

Im struggling with the shape detection using OpenCV for C++. The edged figures such as triangle and rectangular are detected trouble-free. But when it comes to circle it estimates number of vertices up to 6-8. Could somebody help me? void…
bkh6722
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C++ OpenCV - Is there no way to remove title bar of a window?

I am grabbing and displaying video using OpenCV and all I want is a window without the title bar. I've removed the Tool bar and Status bar but I also want to remove the title bar. I found some pointers using which I can display the video in…
Haroon
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Highgui class in OpenCV 3.4.0 Java API

I am learning OpenCV using Java and I wanted to create an application that reads an image from file and displays it on the screen. I've seen few threads here on Stackoverflow which say that Highgui class is not present in OpenCV 3.x, but it looks…
kkalwa
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Is it possible to read unicode value using cv::waitkey(0)

I am trying to read the unicode value of a pressed Arabic key using the waitkey() function on a Mac keyboard, this function only reads the ASCII code of the keys in C++. Is there like any trick that maps that key value ?
M.Saeed
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OpenCV read multiple images from a directory (java)

I'm trying to read multiple images from a file using OpenCV. The current code I have can only read one image at a time Mat source = Highgui.imread(filename,Highgui.CV_LOAD_IMAGE_COLOR); I'd like to load the images into an array and then read them…
diamondgirl
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Cannot handle cv::imshow gtk warning

On a headless test machine (Travis CI), while using cv::imshow I get a program crash and display: Gtk-WARNING **: cannot open display: The message seems normal. But I can not succeed in catching the error! I tried with that code: try { …
Grumot
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