| 1. |
- Fahlquist, Karin, et al.
(författare)
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Human animal machine interaction : Animal behavior awareness and digital experience
- 2010
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Ingår i: Proceedings of ACM Multimedia 2010 - Brave New Ideas, 25-29 October 2010, Firenze, Italy.. - New York, NY, USA : ACM. - 9781605589336 ; , s. 1269-1274
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Konferensbidrag (refereegranskat)abstract
- This paper proposes an intuitive wireless sensor/actuator based communication network for human animal interaction for a digital zoo. In order to enhance effective observation and control over wild life, we have built a wireless sensor network. 25 video transmitting nodes are installed for animal behavior observation and experimental vibrotactile collars have been designed for effective control in an animal park. The goal of our research is two-folded. Firstly, to provide an interaction between digital users and animals, and monitor the animal behavior for safety purposes. Secondly, we investigate how animals can be controlled or trained based on vibrotactile stimuli instead of electric stimuli. We have designed a multimedia sensor network for human animal machine interaction. We have evaluated the effect of human animal machine state communication model in field experiments.
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| 2. |
- Li, Fei, et al.
(författare)
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A quantum search based signal detection for MIMO-OFDM systems
- 2011
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Ingår i: 18th International Conference on Telecommunications, ICT 2011. - : IEEE. - 9781457700248 - 9781457700255 ; , s. 276-281
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Konferensbidrag (refereegranskat)abstract
- Multiple input multiple output-orthogonal frequency division multiplexing (MIMO-OFDM) is considered as candidates for future broadband wireless services. In this paper a novel signal detection scheme based on Grover's quantum search algorithm is proposed for MIMO-OFDM systems. Grover's quantum search algorithm is based on the concept and principles of quantum computing, such as quantum bit, quantum register and quantum parallelism. An analysis is given to the theoretical basis of Grover's algorithm and the performance of Grover's algorithm is evaluated. A novel signal detector based on Grover's algorithm (GD) for MIMO-OFDM system is proposed. The simulation results show that the proposed detector has more powerful properties in bit error rate than MMSE detector and VBLAST-MMSE detector. The performance of the proposed GD detector is close to optimal when the failure probability is 0.001. When the failure probability is 0.00001, the performance of GD detector declines. In this case, our proposed improved Grover's algorithm based detector is still close to the optimal ML detector. The complexity of GD and IGD is O(√N). It's much better than classical ML detector which complexity is O(N).
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| 3. |
- Li, Liu, 1965-, et al.
(författare)
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Vibrotactile chair : A social interface for blind
- 2006
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Ingår i: Proceedings SSBA 2006. - Umeå : Umeå universitet. Institutionen för datavetenskap. ; , s. 117-120
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- In this paper we present our vibrotactile chair, a social interface for the blind. With this chair the blind can get on-line emotion information from the person he / she is heading to. This greatly enhances communication ability and improve the quality of social life of the blind. In the paper we are discussing technical challenges and design principles behind the chair, and introduce the experimental platform: tactile facial expression appearance recognition system (TEARS)TM".
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| 4. |
- ur Réhman, Shafiq, 1978-, et al.
(författare)
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Facial expression appearance for tactile perception of emotions
- 2007
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Ingår i: Proceedings of Swedish symposium on image analysis, 2007. ; , s. 157-160
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Konferensbidrag (refereegranskat)abstract
- To enhance the daily life experience for visually challengedpersons, the Facial Expression Appearance for Tactile systemis proposed. The manifold of facial expressions is used fortactile perception. Locally Linear Embedding (LLE) codingalgorithm is implemented for tactile display. LLE algorithmis extended to handle the real time video coding. The vibrotactilechair as a social interface for the blind is used to displaythe facial expression. The chair provides the visuallyimpaired with on-line emotion information about the personhe/she is approaching. The preliminary results are encouragingand show that it greatly enhances communication abilityof the visually impaired person.
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| 5. |
- ur Réhman, Shafiq, 1978-, et al.
(författare)
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How to use manual labelers in evaluation of lip analysis systems?
- 2009
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Ingår i: Visual speech recognition. - USA : IGI Global. - 9781605661865 ; , s. 239-259
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Bokkapitel (övrigt vetenskapligt/konstnärligt)abstract
- The purpose of this chapter is not to describe any lip analysis algorithms but rather to discuss some of the issues involved in evaluating and calibrating labeled lip features from human operators. In the chapter we question the common practice in the field: using manual lip labels directly as the ground truth for the evaluation of lip analysis algorithms. Our empirical results using an Expectation-Maximization procedure show that subjective noise in manual labelers can be quite significant in terms of quantifying both human and algorithm extraction performance. To train and evaluate a lip analysis system one can measure the performance of human operators and infer the “ground truth” from the manual labelers, simultaneously.
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| 6. |
- ur Réhman, Shafiq, 1978-, et al.
(författare)
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Lip segmentation : performance evaluation criteria
- 2006
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- In this work, we determined the measure to compare and evaluate the performance of lip detection techniques.Despite of a number of methods used for lip-detecction/localization, a reliable method for comparing and determining the quality of the result is still missing. The proposed criterion ensures the clear and fair way to report the results so that mentioned results can be comparable and measurable to enhance the quality of lip detection and/or error rate. After applying the EM-like algorithm it is showed that performance of the specific technique can be evaluated.
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| 7. |
- ur Réhman, Shafiq, 1978-, et al.
(författare)
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Lipless tracking and emotion estimation
- 2007
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Ingår i: <em>Proceedings of IEEE 3rd International Conference on Signal ImageTechnology & Internet based Systems </em>. - Shanghai, China : IEEE. - 9780769531229 ; , s. 768-774
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Konferensbidrag (refereegranskat)abstract
- Automatic human lip tracking is one of the key components to many facial image analysis tasks, such as, lip-reading and emotion from lips. It has been a classical hard image analysis problem over decades. In this paper, we propose an indirect lip tracking strategy: ‘lipless tracking’. It is based on the observation that many of us don’t have clear lips and some even don’t have visible lips. The strategy is to select and localize stable lip features around the mouth for tracking. For this purpose deformable contour-segments are modelled based on lip features and tracking is done using dynamic programming and viterbi algorithm. The strength of proposed algorithm is demonstrated in emotion estimation domain. Finally, real-time video experiments performed on private and publicly available data sets (MMI face database) have shown the robustness of our proposed lipless tracking technique.
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| 8. |
- ur Réhman, Shafiq, 1978-, et al.
(författare)
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Tactile car warning system
- 2005
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Ingår i: Proceedings of first joint Euro Haptics conference and symposium on haptic interfaces for virtual environment and teleoperator systems. - Pisa, Italy : IEEE.
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- Driving on the busy road is a critical job. Drivers need to combine all senses to solve to handle upcoming events and situations. According to recent survey pedestrian based accidents represent a huge portion of traffic accidents in EU, it is stated that more than 200,000 pedestrians are injured and about 9,000 are killed in accidents yearly. Enormous amounts of research have been on the detectionDriving on the busy road is a critical job. Drivers need to combine all senses to solve to handle upcoming events and situations. According to recent survey pedestrian based accidents represent a huge portion of traffic accidents in EU, it is stated that more than 200,000 pedestrians are injured and about 9,000 are killed in accidents yearly. Enormous amounts of research have been on the detection of pedestrian from moving platform using different image processing techniques like shape/texture-based method. Currently, Guilloux and his colleague pointed out the advantages of using infrared cameras. A few pedestrian detection systems using infrared video sequences have been experimented as well. The possibilities of using the human hands as tactile sensory input are explored by the researchers in order to obtain precise knowledge for building tactual display. Recently a number of vibrotactile devices have been accessible for experimental as well as commercial reason. We present a driver assistant system which will provide tactual alert on detection of the pedestrians. The Different issues regarding the development of driver assistant program are considered. Here the Template matching based pedestrian detection in infrared videos is performed. Finally, ‘Driver assistant system’ experiment is presented.
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| 9. |
- Li, Fei, et al.
(författare)
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Quantum Bacterial Foraging Optimization Algorithm
- 2014
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Ingår i: 2014 IEEE CONGRESS ON EVOLUTIONARY COMPUTATION (CEC). - : IEEE Press. - 9781479914883 ; , s. 1265-1272
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Konferensbidrag (refereegranskat)abstract
- This paper proposes a novel swarm intelligence optimization method which integrates bacterial foraging optimization (BFO) with quantum computing, called quantum bacterial foraging optimization (QBFO) algorithm. In QBFO, a multi-qubit which can represent a linear superposition of states in search space probabilistically is used to represent a bacterium, so that the quantum bacteria representation has a better characteristic of population diversity. A quantum rotation gate is designed to simulate the chemotactic step to drive the bacteria toward better solutions. Several tests are conducted based on benchmark functions including multi-peak function to evaluate optimization performance of the proposed algorithm. The numeric results show that the proposed QBFO has more powerful properties in convergence rate, stability and the ability of searching for the global optimal solution than the original BFO and quantum genetic algorithm. In addition, we applied our proposed QBFO to solve the traveling salesman problem, which is a well-known NP-hard problem in combinatorial optimization. The results indicate that the proposed QBFO shows better convergence behavior without premature convergence, and has more powerful properties in convergence rate, stability and the ability of searching for the global optimal solution, as compared to ant colony optimization algorithm and quantum genetic algorithm.
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| 10. |
- ur Réhman, Shafiq, 1978-, et al.
(författare)
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Turn your mobile into the football : rendering live football game by vibration
- 2008
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Ingår i: IEEE transactions on multimedia. - 1520-9210 .- 1941-0077. ; 10:6, s. 1022-1033
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Tidskriftsartikel (refereegranskat)abstract
- Vibration offers many potential benefits for the use of mobile phones. In this paper, we propose a new method of rendering live football game on mobile phones using vibration. A mobile phone is “synchronized” with the ball in the real field. By holding the phone, users are able to experience dynamic movements of the ball, to know attacking directions and which team is leading the attack. The usability test of our system shows that vibrotactile display is suitable for rendering live football information on mobile phones by adopting designed coding schemes with a right training process.
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