Mobile Interaction, Wolfgang Hürst @ VisHMC’14

Many thanks again to Prof. Wolfgang Hürst for giving a great keynote talk about “Mobile Interaction – Examples for Visualization of and Interaction with Different Media Types on Mobiles” at the 1st International Workshop on Visualization of Heterogeneous Multimedia Content (VisHMC’14), held together with the IEEE International Conference on Multimedia & Expo 2014 (ICME 2014) in Chengdu, China. The talk was very interesting and inspiring! Below you can find a few pictures of it. The slides of the talk are available as PDF here.


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3D Interfaces to Improve the Performance of Visual Known-Item Search

A preprint of our paper “3D Interfaces to Improve the Performance of Visual Known-Item Search”, to appear in IEEE Transactions on Multimedia, is available here.

Video Browsing – The Need for Interactive Video Search

Here are the slides from my talk about Video Browsing, which I gave in Klagenfurt on June 18, 2014 at the International Workshop on Content-Based Multimedia Indexing (CBMI) 2014.

Making Video Interaction on Touch Devices Consistent

screenshot1The video players on smartphones and tablets typically use seeker-bars for temporal navigation in videos. In order to jump to different positions in the video you simply have to drag the seeker-bar. However, we argue that this interaction concept is inconsistent to usual interaction with other media on touch devices. For example, in a photo collection you perform horizontal wipe (i.e., drag) gestures in order to browse through all photos of the collection. Similarly, when scrolling through documents or presentation slides, you perform horizontal (or vertical) wipe gestures. Hence, we propose to use such wipe gestures also for navigation in video. Our work combines the ideas proposed earlier by Huber et al. and Hürst et al. in order to allow flexible navigation within a single video but also in a video collection. More details can be found in the preprint of our paperVideo Navigation on Tablets with Multi-Touch Gestures”, to be presented at the 3rd International Workshop on Emerging Multimedia Systems and Applications (EMSA) at the IEEE International Conference on Multimedia & Expo (ICME) in July 2014 in Chengdu, China. Our prototype is also available on the App Store on iTunes for the Apple iPad (many thanks to Kevin Chromik for the implementation and evaluation)!

Deadline extension for ICME 2014 Workshops (MMC, VisHMC)

The paper submission deadline for ICME 2014 workshops has been extended to April 1, 2014. Please consider submitting a paper (6 pages in IEEE double-column style) to one of these interesting workshops:


Call for Papers: PCM 2014

The Pacific-Rim Conference on Multimedia (PCM) is the major annual international conference in Asia organized as a forum for the dissemination of state-of-the-art technological advances and research results in the fields
of theoretical, experimental, and applied multimedia analysis and processing. The conference calls for research papers reporting original investigation results and industrial-track papers reporting real-world multimedia applications and system development experiences. The conference also solicits proposals for tutorials on enabling multimedia technologies, and calls for dedicated special session proposals focusing on emerging challenges in the multimedia arena. PCM 2014 will be held in Kuching, Sarawak, Malaysia. Sarawak, also know as the “Land of the Hornbills”, offers an unforgettable mix of culture- and nature-based travel experiences.

PCM 2014 accepts both full, short and demo papers. Papers should be formatted according to the Lecture Notes in Computer Science template available at the PCM2014 website. A full paper should be 9-10 pages in length; short papers should be exactly 6 pages, and demo paper should be exactly 4 pages.

Important dates:
31 May 2014:  Regular paper submission
15 June 2014: Demo paper submission
10 Aug 2014:  Notification of acceptance
31 Aug 2014:  Camera ready submission


For more information please visit the PCM 2014 website!


OpenCV on Mobile Devices?

Our paper on “OpenCV Performance Measurements on Mobile Devices” has been accepted for the ACM International Conference on Multimedia Retrieval (ICMR 2014)! It investigates the run-time performance of typical image content analysis tasks performed with OpenCV on iOS-based mobile devices in direct comparison to a desktop computer. So in case you wonder whether it is a good idea to run content-based analysis methods  directly on the iPad, you should read our paper, which is available here as a preprint:

Mobile Multimedia Computing



The intimate presence of mobile devices in our daily life, such as smartphones and tablets, has dramatically changed the way we connect with the world around us. Users rely on mobile devices to maintain an always-on relation to information, personal, and social networks. With a growing number of powerful embedded mobile sensors like camera, microphone, GPS, gyroscope, accelerometer, digital compass, and proximity sensor, there is a variety of data recorded and hence enables new sensing applications across diverse research domains comprising mobile media analysis, mobile information retrieval, mobile computer vision, mobile social networks, mobile human-computer interaction, mobile entertainment, mobile gaming, mobile healthcare, mobile learning, and mobile advertising.

Regardless of the application fields, many issues and challenges brought by the emerging technologies for mobile multimedia still lie ahead and many research questions remain to be answered. For example, seamless user experience has been identified as one key factor in designing mobile multimedia applications for multiple form factors, but its provision can be challenging and require effective integration of rich mobile sensors and multidisciplinary research, such as multimedia content adaptation and user behavior analysis. In addition, for power saving purpose, application-driven energy management is an important technical consideration in mobile multimedia computing, e.g. what part of the computing should be performed on mobile devices, and what part is better shifted to the cloud servers?

This workshop, WMMC 2014, aims to bring together researchers and professionals from worldwide academia and industry for showcasing, discussing, and reviewing the whole spectrum of technological opportunities, challenges, solutions, and emerging applications in mobile multimedia.

More information here.

Visualization of Heterogeneous Content


Call for Papers

We are pleased to announce the 1st International Workshop on the Visualization of Heterogeneous Multimedia Content, held in conjunction with ICME 2014.

Most of the time when we speak of multimedia corpora, we think of homogeneous datasets consisting of either audio files, videos or sensor data. In recent years, however, we could observe the creation of more and more heterogeneous corpora that consist of data from different sources and of different modality. A typical example are visual lifelogs, i.e., private data collections consisting of large numbers of automatically recorded images, video snippets and accompanying sensor streams. Visualizing such heterogeneous and often large multimedia corpora raise novel challenges that cannot easily be addressed by existing visualization methodologies that have been developed for homogeneous datasets. However, not only visualizing but also browsing such multimedia corpora is a challenging task that needs new interaction and filtering methods in addition to textual queries. This workshop aims to provide a platform for multimedia practitioners and researchers to discuss emerging research trends in this field.

More information here.

Best Poster Paper at MMM2014

I am very glad that our paper on “How do Users Search with Basic HTML5 Video Players?” (by Claudiu Cobarzan and Klaus Schoeffmann) has been awarded last week at the 20th Anniversary International Conference on MultiMedia Modeling in Dublin, Ireland, January 6-10, 2014 (MMM2014), as Best Poster paper!  Many thanks and congratulations to Claudiu for this great achievement! The paper is available here: