Category Archive: opengl

Apr 24

WTH OpenGL 4? Rendering elements arrays with VAOs and VBOs in a QGLWidget

Simple example usage of OpenGL 4 and vertex array / vertex buffer rendering in a Qt QGLWidget.

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Mar 16

Bootstrapping planar AR and tracking without markers [w/code]

Years ago I wanted to implement PTAM. I was young and na├»ve Well I got a few moments to spare on a recent sleepless night, and I set out to implement the basic bootstrapping step of initializing a map with a planar object - no known markers needed, and then tracking it for augmented reality …

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Feb 17

Augmented Reality on libQGLViewer and OpenCV-OpenGL tips [w/code]

How to create an augmented reality app with QGLViewer, including some tips on camera calibration and extrinsic parameters from OpenCV to OpenGL.

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Nov 09

Vertex array objects with shaders on OpenGL 2.1 & GLSL 1.2 [w/code]

Using VAOs and shaders under OpenGL 2.1 and GLSL 1.2

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Nov 04

How I fell for QGLViewer for my Qt/OpenGL projects [w/ code]

A simple quick recipe for using OpenGL in Qt environment using libQGLViewer

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Oct 17

Head Pose Estimation with OpenCV & OpenGL Revisited [w/ code]

Using Perspective-N-Point to get the position and orientation of a human head, with basic OpenCV and OpenGL.

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Feb 07

Structure from Motion and 3D reconstruction on the easy in OpenCV 2.3+ [w/ code]

Hello This time I'll discuss a basic implementation of a Structure from Motion method, following the steps Hartley and Zisserman show in "The Bible" book: "Multiple View Geometry". I will show how simply their linear method can be implemented in OpenCV. I treat this as a kind of tutorial, or a toy example, of how …

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Dec 20

Spherical harmonics face relighting using OpenCV, OpenGL [w/ code]

Implementing a face image relighting algorithm using spherical harmonics, based on a paper written by Wang et al (2007).

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Dec 02

A Kinect browser plugin with FireBreath [w/ code]

Hi, Just reporting on a small achievement, part of a big project: Creating a browser plugin to display the Kinect depth map on screen. The integration was fairly easy, which leads me to think that both FireBreath and OpenNI/Nite are pretty neat framework that are robust.. So let's see how it's done

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Dec 01

Identity Transfer in Photographs

Hi! I would like to present something I have been working on recently, a work that immensely affect what I wrote in the blog in the past two years... To use it: Go on this page, Watch the short instruction video, download the application (MacOSX-Intel-x64 Win32) and make yourself a model! It takes just a …

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