Tag Archive: 3d

Dec 10

Model and render a folded paper with FreeCAD, Blender

Hello, I created a little video tutorial to model and render a folded piece of paper for a project I'm working on... Here it is, enjoy!

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Oct 17

Structure-from-Motion Toy Lib Upgrades to OpenCV 3

sfm toy lib

The toy SfM library is upgraded to OpenCV 3.x and gets a ton of simplifications.

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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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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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Jan 04

Simple triangulation with OpenCV from Harley & Zisserman [w/ code]

Easily using OpenCV 2.3+ to triangulate points from known camera matrices and point sets.

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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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Oct 30

A GLSL shader showing the normal map [w/ code]

Screen shot 2011-10-30 at 11.13.48 AM

A very simple thing, although I couldn't find on Google some place to copy-paste off, so here it is:

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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. …

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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 …

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