Evaluation of color representation for texture analysis

Since more than 50 years texture in image material is a topic of research. Hereby, color was ignored mostly. This study compares 70 different configurations for texture analysis, using four features. For the configurations we used: (i) a gray value texture descriptor: the co-occurrence matrix and a color texture descriptor: the color correlogram, (ii) six color spaces, and (iii) several quantization schemes. A three classifier combination was used to classify the output of the configurations on the VisTex texture database. The results indicate that the use of a coarse HSV color space quantization can substantially improve texture recognition compared to various other gray and color quantization schemes

TACOP: A Cognitive Agent for a Naval Training Simulation Environment

The full version of this paper appeared in: Doesburg, W. A. van, Heuvelink, A., and Broek, E. L. van den (2005). TACOP: A cognitive agent for a naval training simulation environment. In M. Pechoucek, D. Steiner, and S. Thompson (Eds.), Proceedings of the Industry Track of the Fourth International Joint Conference on Autonomous Agents and Multi-Agent Systems (AAMAS-05), p.34-41. July 25-29, Utrecht, The Netherlands

Modeling human color categorization: color discrimination and color memory

Color matching in Content-Based Image Retrieval is done using a color space and measuring distances between colors. Such an approach yields non-intuitive results for the user. We introduce color categories (or focal colors), determine that they are valid, and use them in two experiments. The experiments conducted prove the difference between color categorization by the cognitive processes color discrimination and color memory. In addition, they yield a Color Look-Up Table, which can improve color matching, that can be seen as a model for human color matching

Exploiting Coarse Grained Parallelism in Conceptual Data Mining

Contains fulltext : 73161.pdf (publisher's version ) (Open Access

Modality-specific Affective Responses and their Implications for Affective BCI

Reliable applications of multimodal affective brain-computer interfaces (aBCI) require a detailed understanding of the processes involved in emotions. To explore the modality-specific nature of affective responses, we studied neurophysiological responses of 24 subjects during visual, auditory, and audiovisual affect stimulation and obtained their subjective ratings. Coherent with literature, we found modality-specific responses in the EEG: parietal alpha power decreases during visual stimulation and increases during auditory stimulation, whereas more anterior alpha power decreases during auditory stimulation and increases during visual stimulation. We discuss the implications of these results for multimodal aBCI

Brain computer interfaces as intelligent sensors for enhancing human-computer interaction

BCIs are traditionally conceived as a way to control apparatus, an interface that allows you to act on" external devices as a form of input control. We propose an alternative use of BCIs, that of monitoring users as an additional intelligent sensor to enrich traditional means of interaction. This vision is what we consider to be a grand challenge in the field of multimodal interaction. In this article, this challenge is introduced, related to existing work, and illustrated using some best practices and the contributions it has received

Сравнительный анализ нелинейных резонансов механической системы с несимметричной кусочно-линейной характеристикой восстанавливающей силы

Представлены результаты численного сравнительного анализа супергармонических резонансов порядка 2/1...5/1 и субгармонического резонанса порядка 1/2 механической колебательной системы с одной степенью свободы с несимметричной кусочно-линейной характеристикой восстанавливающей силы при различных соотношениях жесткости системы на полуциклах и в условиях существенного изменения уровня демпфирования колебаний в системе.Представлено результати числового порівняльного аналізу супергармоніч- них резонансів порядку 2/1...5/1 і субгармонічного резонансу порядку 1/2 механічної коливної системи з одним ступенем вільності з несиметричною кусково-лінійною характеристикою відновлювальної сили при різних співвідношеннях жорсткості системи на півциклах і в умовах суттєвої зміни рівня демпфірування коливань у системі.We present results of the numerical comparative analysis of superharmonic resonances of 2/1-5/1 order and a sub-harmonic resonance of 1/2 order of mechanical vibratory systems with one degree of freedom with asymmetrical piecewise linear performance of recovering force for various system rigidity ratios in half-cycles and for conditions of significant variation of the level of vibration damping in the system

Continuous affect state annotation using a joystick-based user interface

Ongoing research at the DLR (German Aerospace Center) aims to employ affective computing techniques to ascertain the emotional states of users in motion simulators. In this work, a novel user feedback interface employing a joystick to acquire subjective evaluation of the affective experience is presented. This interface allows the subjects to continuously annotate their affect states, elicited in this scenario by watching video clips. Several physiological parameters (e.g. heart rate, electrodermal activity, respiration rate, etc.) were acquired during the viewing session. A statistical analysis is presented, which shows expected patterns in data that validate the design and methodology of the experiment and lay the groundwork for further experiments to be undertaken at the DLR