Click here to Skip to main content
13,553,244 members
Click here to Skip to main content
Add your own
alternative version


25 bookmarked
Posted 25 Mar 2009
Licenced GPL3

Video Texture in OpenGL

, 25 Mar 2009
Rate this:
Please Sign up or sign in to vote.
This article describes how a texture can be created in OpenGL from a live video stream from a web cam or a video file.


This short program shows how a live video stream from a web cam (or from a video file) can be rendered in OpenGL as a texture. The live video stream is captured using the Open Source Computer Vision library (OpenCV). The program also shows how an OpenCV image can be converted into OpenGL texture. This code can be used as the first step in the development of an Augmented Reality application using OpenCV and OpenGL.

Understanding the Code

The program renders an OpenGL textured quad which shows a live video stream. The code does not contain any additional functionality, and is kept very simple for easy understanding.

The OpenGL texture is continuously created in the OnIdle callback function. The next available frame in the video stream is captured first:

IplImage *image = cvQueryFrame(g_Capture);

The image is stored in the OpenCV data structure IplImage. Please see the OpenCV documentation for details. The image captured by OpenCV is stored as a BGR. It is first converted to RGB using the OpenCV function cvCvtColor.

cvCvtColor(image, image, CV_BGR2RGB);

Then, the following magic call creates a 2D OpenGL texture from the OpenCV image:

gluBuild2DMipmaps(GL_TEXTURE_2D, GL_RGB, image->width, image->height, 
                  GL_RGB, GL_UNSIGNED_BYTE, image->imageData);

The texture is loaded into memory and is available for rendering.

Compiling and Running

The code is compiled and tested using Microsoft Visual Studio 2008. However, it can be compiled using any C++ compiler on any platform. The program uses the OpenGL, GLUT, and OpenCV libraries. Please make sure that you have installed them and paths to the include and lib directories are set. OpenCV can be downloaded from here.


This article, along with any associated source code and files, is licensed under The GNU General Public License (GPLv3)


About the Author

Arsalan Malik
Software Developer (Senior)
Pakistan Pakistan
No Biography provided

You may also be interested in...

Comments and Discussions

GeneralRe: [My vote of 1] Check Nehe SDK Pin
Ben_King14-Oct-09 22:37
memberBen_King14-Oct-09 22:37 
GeneralMy vote of 1 Pin
Adrian Pasik25-Mar-09 10:51
memberAdrian Pasik25-Mar-09 10:51 
GeneralRe: My vote of 1 Pin
Arsalan Malik26-Mar-09 4:14
memberArsalan Malik26-Mar-09 4:14 

General General    News News    Suggestion Suggestion    Question Question    Bug Bug    Answer Answer    Joke Joke    Praise Praise    Rant Rant    Admin Admin   

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.

Permalink | Advertise | Privacy | Terms of Use | Mobile
Web01-2016 | 2.8.180515.1 | Last Updated 25 Mar 2009
Article Copyright 2009 by Arsalan Malik
Everything else Copyright © CodeProject, 1999-2018
Layout: fixed | fluid