Tag Archive: opencv

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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May 08

Quickly: How to render a PDF to an image in C++?

How to render a PDF to an image in C++ using Poppler

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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 05

Using Hidden Markov Models for staff line removal (in OMR) [w/code]

From left to right: Original binarized images, staff lines annotated by HMM,  staff lines removed.

So lately I'm into Optical Music Recognition (OMR), and a central part of that is doing staff line removal. That is when you get rid of the staff lines that obscure the musical symbols to make recognition much easier. There are a lot of ways to do it, but I'm going to share with you …

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Jan 21

Run length encoding in OpenCV [w/code]

RLE example

Code snippet for RLE calculation on OpenCV Mats

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Jan 14

Simplest Color Balance with OpenCV [w/code]

Color balance

A very simple color balancing algorithm in OpenCV C++

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May 26

Extending the hand tracker with snakes and optimizations [w/ code, OpenCV]

output-comp

Continuing the work on a hand curve particle filter following Heap&Hogg's work, adding active contours and optimizations

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May 25

OpenNI 2.x and OpenCV interoperability [w/ code]

A simple wrapper around OpenNI 2.x drives for interoperability with OpenCV

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Mar 16

Curve tracking with a Heap&Hogg's Particle Filters [w/ code, OpenCV]

Screen Shot 2013-03-15 at 6.18.30 PM

I wanna share some code for 2D curve tracking with a particle filter, implementing the body of work of Tony Heap and David Hogg. These guys presented a relatively easy to implement method for tracking deformable curves through space and change in form using a Hierarchical Point Distribution Models (HPDM), which is another elegant way …

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Mar 05

Skin Detection with Probability Maps and Elliptical Boundaries [OpenCV, w/code]

Skind detection wit Skin Probabilty Maps and Elliptical Boundary Models, implementations in c++ with OpenCV

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