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code ffmpeg graphics programming video

FFMPEG video writer – now with animated GIF support [w/ code]

rect3825So animated gifs are awesome if you’re writing a software blog. It saves all this time working with YouTube embeddings and stuff, and your “videos” are stored locally. The simplified FFMPEG writer was before unable to output animated GIFs, but I’ve tweaked it and now it does. It’s also a nice piece of code to learn how to FFMPEG in C.

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code electronics video

C++ library for the C329 SPI camera module [w/ code]

Just putting it out there for whoever is trying to use the C329 camera module of the SPI variety (the URAT module has code posted online)

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code ffmpeg programming video

Simplified FFMPEG video writer (also for OpenFramework) [w/ code]

I want to share a little snippet in case anyone is interested in writing video files from cpp context using FFMPEG, I’ve made it for usage with OpenFrameworks.
It’s basically a simple wrapper around the encoding mechanism of FFMPEG, so you can easily just say which file to write to and start dumping images into it. It will take care of choosing the codec, writing headers and trailers, encode (compress) the frames and write them to the file.

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code graphics opencv programming video vision

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 to store shape priors. Granted, it is not perfect, but for a simple 2D shape like a hand it works pretty good, and rather fast as well.
Let’s dive in then,

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code graphics opencv programming video vision

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

maskSharing a bit of code I created for skin detection.

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3d code graphics opencv opengl programming Recommended video vision Website

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 to perform Structure from Motion in OpenCV.
See related posts on using Qt instead of FLTK, triangulation and decomposing the essential matrix.
Update 2017: For a more in-depth tutorial see the new Mastering OpenCV book, chapter 3. Also see a recent post on upgrading to OpenCV3.
Let’s get down to business…

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3d code graphics gui opencv opengl programming school video vision

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

Hi!
I’ve been working on implementing a face image relighting algorithm using spherical harmonics, one of the most elegant methods I’ve seen lately.
I start up by aligning a face model with OpenGL to automatically get the canonical face normals, which brushed up my knowledge of GLSL. Then I continue to estimating real faces “spharmonics”, and relighting.
Let’s start!

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code graphics opengl programming video

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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code graphics opencv opengl programming school video vision

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 couple of minutes and it’s very simple…
This work is an academic research project, Please please, take the time to fill out the survey! It is very short..
The results of the survey (the survey alone, no photos of your work) will possibly be published in an academic paper.
Note: No information is sent anywhere in any way outside of your machine (you may even unplug the network). All results are saved locally on your computer, and no inputs are recorded or transmitted. The application contains no malware. The source is available here.
Note II: All stock photos of models used in the application are released under Creative Commons By-NC-SA 2.0 license. Creator: http://www.flickr.com/photos/kk/. If you wish to distribute your results, they should also be released under a CC-By-NC-SA 2.0 license.
Thank you!
Roy.

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code opencv programming Recommended Software video vision

A simple object classifier with Bag-of-Words using OpenCV 2.3 [w/ code]


Just wanted to share of some code I’ve been writing.
So I wanted to create a food classifier, for a cool project down in the Media Lab called FoodCam. It’s basically a camera that people put free food under, and they can send an email alert to the entire building to come eat (by pushing a huge button marked “Dinner Bell”). Really a cool thing.
OK let’s get down to business.