The problem of overbuffering in today’s Internet (termed as bufferbloat) has  recently drawn a great amount of attention from the research community. This  has led to the development of various active queue management (AQM) schemes.  The last years have seen a lot of effort to show the benefits of AQMs over simple  tail-drop queuing and to encourage deployment. Yet it […] Continue reading

Redundant Data Bundling in TCP

Redundant Data Bundling (RDB) is a mechanism for TCP that aims to reduce the per-packet latency for traffic produced by interactive applications. The master’s thesis Taming Redundant Data Bundling: Balancing fairness and latency for redundant bundling in TCP[1] presents a new implementation in the Linux kernel, along with a detailed set of experiments that show the benefits of RDB. The […] Continue reading

OpenSea – A search based classification tool

OpenSea contains software for experimenting with image recognition and classification based on global image features. It is able to classify single images but it also can extract frames from videos and classify them in real time. The software is easy to handle and can for example be used as a simple but strong baseline for evaluating classifiers. This video https://www.youtube.com/watch?v=gb2BqMuZ2h0 […] Continue reading

Kenneth Klette Jonassen’s proposed CDG patch featured in lwn.net

Master student Kenneth Klette Jonassen has spent his thesis exploring congestion controls for low latency and has ported the Caia Delay-Gradient (CDG) algorithm from FreeBSD to Linux. His RFC posting of the CDG code to the netdev list got a lot of attention and was featured on the LWN kernel update last week. His thesis documents significant differences between the […] Continue reading

OpenVQ – an objective quality assessment tool

OpenVQ is a video quality assessment toolkit. It is the result of a two-person master thesis that we initiated to fix the general trend of excusing video quality estimation with PSNR by providing a tool that comes closer to the standardized objective metrics of VQEG. It can be accessed here: https://bitbucket.org/mpg_code/openvq OpenVQ provides anyone interested in video quality assessment with […] Continue reading

Bagadus pipeline is open source

The Bagadus system is a panorama capturing system that has been put to good use in capturing football events for immediate as well as off-line analysis, as well as the enjoyment of its users. The software allows you use a multi-camera array to produce cylindrical panoramas like the one shown in the picture in real-time. At the conclusion of the […] Continue reading

Image transparency overlay with GNU Octave using YCbCr

So, let’s say someone sends you a Matlab file displaying interesting image regions using the AlphaData figure property. You, a free software hippie, are using Debian 7.5 and Octave 3.6.2. Trying to run the file with Octave, it spits out this message: error: get: unknown image property AlphaData You spend the next 15 mins Googling and find that there are […] Continue reading

New trigger box design released

Our Alfheim setup requires that several cameras record a football stadium in a synchronized manner. Earlier trigger boxes, which were designed for an indoor scenario in the Verdione project, required a long time to build and quite a bit of care.