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- research-articleSeptember 2024
Omnidirectional image quality assessment with local–global vision transformers
AbstractWith the rising popularity of omnidirectional images (ODIs) in virtual reality applications, the need for specialized image quality assessment (IQA) methods becomes increasingly critical. Traditional IQA approaches, designed for rectilinear ...
Highlights- Introduces LGT360IQ, a dual-branch framework for 360° image quality assessment (IQA).
- Mimics top-down and bottom-up visual attention for omnidirectional images (ODIs).
- Employs Transformers for local and global processing to ...
- research-articleJuly 2022
Automatic content moderation on social media
Multimedia Tools and Applications (MTAA), Volume 82, Issue 3Pages 4439–4463https://doi.org/10.1007/s11042-022-11968-3AbstractMillions of users produce and consume billions of content on social media. Therefore, human-reviewed content moderation is not achievable in such volume. Automating content moderation is a scalable solution for social media platforms. In this ...
- tutorialOctober 2020
Immersive Imaging Technologies: From Capture to Display
MM '20: Proceedings of the 28th ACM International Conference on MultimediaPages 4787–4788https://doi.org/10.1145/3394171.3418550New immersive imaging technologies enable creating multimedia systems that would increase the viewer presence and provide an immersive experience. This half-day tutorial aims to give an overview of these new immersive imaging systems and help the ...
- research-articleJuly 2020
Cycle-consistent generative adversarial neural networks based low quality fingerprint enhancement
- Dogus Karabulut,
- Pavlo Tertychnyi,
- Hasan Sait Arslan,
- Cagri Ozcinar,
- Kamal Nasrollahi,
- Joan Valls,
- Joan Vilaseca,
- Thomas B. Moeslund,
- Gholamreza Anbarjafari
Multimedia Tools and Applications (MTAA), Volume 79, Issue 25-26Pages 18569–18589https://doi.org/10.1007/s11042-020-08750-8AbstractDistortions such as dryness, wetness, blurriness, physical damages and presence of dots in fingerprints are a detriment to a good analysis of them. Even though fingerprint image enhancement is possible through physical solutions such as removing ...
- research-articleMay 2020
Do Users Behave Similarly in VR? Investigation of the User Influence on the System Design
ACM Transactions on Multimedia Computing, Communications, and Applications (TOMM), Volume 16, Issue 2Article No.: 46, Pages 1–26https://doi.org/10.1145/3381846With the overarching goal of developing user-centric Virtual Reality (VR) systems, a new wave of studies focused on understanding how users interact in VR environments has recently emerged. Despite the intense efforts, however, current literature still ...
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- correctionMay 2020
Correction to: Optimal image compression via block-based adaptive colour reduction with minimal contour effect
- Pejman Rasti,
- Iiris Lüsi,
- Anastasia Bolotnikova,
- Morteza Daneshmand,
- Cagri Ozcinar,
- Gholamreza Anbarjafari
Multimedia Tools and Applications (MTAA), Volume 79, Issue 19-20Pages 14313–14314https://doi.org/10.1007/s11042-019-08204-wAfter the publication of this work [1], it was noticed that the co-author Pejman Rasti was omitted as the first author following an institutional investigation. The first author’s name is inserted in this erratum article.
- research-articleSeptember 2019
A novel deep network architecture for reconstructing RGB facial images from thermal for face recognition
- Andre Litvin,
- Kamal Nasrollahi,
- Sergio Escalera,
- Cagri Ozcinar,
- Thomas B. Moeslund,
- Gholamreza Anbarjafari
Multimedia Tools and Applications (MTAA), Volume 78, Issue 18Pages 25259–25271https://doi.org/10.1007/s11042-019-7667-4AbstractThis work proposes a fully convolutional network architecture for RGB face image generation from a given input thermal face image to be applied in face recognition scenarios. The proposed method is based on the FusionNet architecture and increases ...
- research-articleMay 2019
On the effect of age perception biases for real age regression
- Julio C. S. Jacques Junior,
- Cagri Ozcinar,
- Marina Marjanovic,
- Xavier Baró,
- Gholamreza Anbarjafari,
- Sergio Escalera
2019 14th IEEE International Conference on Automatic Face & Gesture Recognition (FG 2019)Pages 1–8https://doi.org/10.1109/FG.2019.8756595Automatic age estimation from facial images represents an important task in computer vision. This paper analyses the effect of gender, age, ethnic, makeup and expression attributes of faces as sources of bias to improve deep apparent age prediction. ...
- articleMarch 2019
Adaptive multi-view video streaming using side information over peer-to-peer networks
Multimedia Tools and Applications (MTAA), Volume 78, Issue 6Pages 7225–7242https://doi.org/10.1007/s11042-018-6492-5Multi-view plus-depth-map (MVD) video streaming with autostereoscopic displays provides multi-user immersive media experiences. In this context, delivery of MVD representation to multiple clients remains a challenging problem because of the high-volume ...
- research-articleDecember 2018
Director's cut: a combined dataset for visual attention analysis in cinematic VR content
CVMP '18: Proceedings of the 15th ACM SIGGRAPH European Conference on Visual Media ProductionArticle No.: 3, Pages 1–10https://doi.org/10.1145/3278471.3278472Methods of storytelling in cinema have well established conventions that have been built over the course of its history and the development of the format. In 360° film many of the techniques that have formed part of this cinematic language or visual ...
- ArticleDecember 2018
Director’s Cut - Analysis of Aspects of Interactive Storytelling for VR Films
AbstractTo explore methods that are currently used by professional virtual reality (VR) filmmakers to tell their stories and guide users, we analyze how end-users view video in the presence of directional cues and evaluate if they are able to follow the ...
- articleDecember 2018
Optimal image compression via block-based adaptive colour reduction with minimal contour effect
Multimedia Tools and Applications (MTAA), Volume 77, Issue 23Pages 30939–30968Current image acquisition devices require tremendous amounts of storage for saving the data returned. This paper overcomes the latter drawback through proposing a colour reduction technique which first subdivides the image into patches, and then makes ...
- research-articleDecember 2018
Optimal image compression via block-based adaptive colour reduction with minimal contour effect
Multimedia Tools and Applications (MTAA), Volume 77, Issue 23Pages 30939–30968https://doi.org/10.1007/s11042-018-6118-yAbstractCurrent image acquisition devices require tremendous amounts of storage for saving the data returned. This paper overcomes the latter drawback through proposing a colour reduction technique which first subdivides the image into patches, and then ...
- articleSeptember 2018
Imperceptible non-blind watermarking and robustness against tone mapping operation attacks for high dynamic range images
Multimedia Tools and Applications (MTAA), Volume 77, Issue 18Pages 24521–24535https://doi.org/10.1007/s11042-018-5759-1High dynamic range (HDR) imaging has experienced a widespread during the recent years through various technologies, including social network applications, which necessitates robust watermarking schemes to protect the copyright and image authentication. ...
- research-articleAugust 2018
Spatio-temporal constrained tone mapping operator for HDR video compression
Journal of Visual Communication and Image Representation (JVCIR), Volume 55, Issue CPages 166–178https://doi.org/10.1016/j.jvcir.2018.06.003Highlights- We propose a spatio-temporal tone mapping operator (ST-TMO) for high dynamic range video compression.
With the growing popularity of high dynamic range (HDR) imaging, efficient compression techniques are demanded, as HDR video entails typically higher raw data rate than traditional video. For this purpose, we introduce a hybrid ...
- research-articleMay 2018
Changes in Facial Expression as Biometric: A Database and Benchmarks of Identification
- Rain Eric Haamer,
- Kaustubh Kulkarni,
- Nasrin Imanpour,
- Mohammad A. Haque,
- Egils Avots,
- Michelle Breisch,
- Kamal Nasrollahi,
- Sergio Escalera,
- Cagri Ozcinar,
- Xavier Baro,
- Ahmad R. Naghsh-Nilchi,
- Thomas B. Moeslund,
- Golamreza Anbarjafari
2018 13th IEEE International Conference on Automatic Face & Gesture Recognition (FG 2018)Pages 621–628https://doi.org/10.1109/FG.2018.00098Facial dynamics can be considered as unique signatures for discrimination between people. These have started to become important topic since many devices have the possibility of unlocking using face recognition or verification. In this work, we evaluate ...
- research-articleSeptember 2017
Viewport-aware adaptive 360° video streaming using tiles for virtual reality
2017 IEEE International Conference on Image Processing (ICIP)Pages 2174–2178https://doi.org/10.1109/ICIP.2017.8296667360° video is attracting an increasing amount of attention in the context of Virtual Reality (VR). Owing to its very high-resolution requirements, existing professional streaming services for 360° video suffer from severe drawbacks. This ...
- research-articleAugust 2017
A new low‐complexity patch‐based image super‐resolution
- Pejman Rasti,
- Kamal Nasrollahi,
- Olga Orlova,
- Gert Tamberg,
- Cagri Ozcinar,
- Thomas B. Moeslund,
- Gholamreza Anbarjafari
IET Computer Vision (CVI2), Volume 11, Issue 7Pages 567–576https://doi.org/10.1049/iet-cvi.2016.0463In this study, a novel single image super‐resolution (SR) method, which uses a generated dictionary from pairs of high‐resolution (HR) images and their corresponding low‐resolution (LR) representations, is proposed. First, HR and LR dictionaries are ...
- research-articleMay 2017
Joint Challenge on Dominant and Complementary Emotion Recognition Using Micro Emotion Features and Head-Pose Estimation: Databases
- Iiris Lüsi,
- Julio C. S. Jacques Junior,
- Jelena Gorbova,
- Xavier Baró,
- Sergio Escalera,
- Hasan Demirel,
- Juri Allik,
- Cagri Ozcinar,
- Gholamreza Anbarjafari
2017 12th IEEE International Conference on Automatic Face & Gesture Recognition (FG 2017)Pages 809–813https://doi.org/10.1109/FG.2017.102In this work two databases for the Joint Challenge on Dominant and Complementary Emotion Recognition Using Micro Emotion Features and Head-Pose Estimation1 are introduced. Head pose estimation paired with and detailed emotion recognition have become very ...
- articleOctober 2016
Adaptive delivery of immersive 3D multi-view video over the Internet
Multimedia Tools and Applications (MTAA), Volume 75, Issue 20Pages 12431–12461https://doi.org/10.1007/s11042-016-3475-2The increase in Internet bandwidth and the developments in 3D video technology have paved the way for the delivery of 3D Multi-View Video (MVV) over the Internet. However, large amounts of data and dynamic network conditions result in frequent network ...