Tag Archive: augmented reality

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 …

Continue reading »

Share

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.

Share

Nov 10

20-lines AR in OpenCV [w/code]

Hi, Just wanted to share a bit of code using OpenCV's camera extrinsic parameters recovery, camera position and rotation - solvePnP (or it's C counterpart cvFindExtrinsicCameraParams2). I wanted to get a simple planar object surface recovery for augmented reality, but without using any of the AR libraries, rather dig into some OpenCV and OpenGL code. …

Continue reading »

Share

Mar 19

Quick and Easy Head Pose Estimation with OpenCV [w/ code]

j5

Update: check out my new post about this http://www.morethantechnical.com/2012/10/17/head-pose-estimation-with-opencv-opengl-revisited-w-code/ Hi Just wanted to share a small thing I did with OpenCV - Head Pose Estimation (sometimes known as Gaze Direction Estimation). Many people try to achieve this and there are a ton of papers covering it, including a recent overview of almost all known methods. …

Continue reading »

Share

Mar 06

Implementing PTAM: stereo, tracking and pose estimation for AR with OpenCV [w/ code]

frames_correl

Hi Been working hard at a project for school the past month, implementing one of the more interesting works I've seen in the AR arena: Parallel Tracking and Mapping (PTAM) [PDF]. This is a work by George Klein [homepage] and David Murray from Oxford university, presented in ISMAR 2007. When I first saw it on …

Continue reading »

Share

Aug 26

iPhoneOS 3.1 will not allow marker-based AR

no-ar

Hi I had very high hopes for iPhoneOS 3.1 in the AR arena. With all the hype about it, I naturally thought that with 3.1 developers will be able to bring marker-detection AR to the app-store - meaning, using legal and published APIs. A look around 3.1's APIs I wasn't able to find anything that …

Continue reading »

Share

Jul 01

Augmented reality on the iPhone using NyARToolkit [w/ code]

nyarrr

Hi I saw the stats for the blog a while ago and it seems that the augmented reality topic is hot! 400 clicks/day, that's awesome! So I wanted to share with you my latest development in this field - cross compiling the AR app to the iPhone. A job that proved easier than I originally …

Continue reading »

Share

Jun 28

Augmented Reality with NyARToolkit, OpenCV & OpenGL

ar

Hi I have been playing around with NyARToolkit's CPP implementation in the last week, and I got some nice results. I tried to keep it as "casual" as I could and not get into the crevices of every library, instead, I wanted to get results and fast. First, NyARToolkit is a derivative of the wonderful …

Continue reading »

Share