Papers by Dubravko Culibrk
arXiv (Cornell University), Mar 23, 2015
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The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2021
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The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Jun 29, 2021
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<p>The results presented in this contribution demonstrate the value of clim... more <p>The results presented in this contribution demonstrate the value of climate services for the planned construction of the new Wastewater Treatment Plant (WWTP) in Novi Sad, Serbia. In this case, climate services provided added value for the decision-making processes, in terms of enhanced effectiveness, optimized technological opportunities and minimized risks and by serving as the means of involving and better-informing end-users and stakeholders. The specific goal of the research was to improve climate change resilience of the WWTP and to facilitate better overall hygienic conditions in Novi Sad and to safeguard the potable water resources and the quality of the environment in the areas located downstream and under the influence of the Danube River.</p> <p>In order to achieve it, preliminary activities were oriented on analyzing the current climate and hydrological conditions, engaging the relevant data providers, stakeholders and policy makers and evaluating what relevant local data would be useful for the study. The data collected was applied in the testing and for improving the Future Danube Multi-hazard, Multi-risk Model (FDM), a catastrophe model implemented in the OASIS Loss Modeling Framework (Oasis-LMF). The FDM is implemented for the entire Danube Basin. High-resolution components for pluvial flood risks were further implemented to the city of Novi Sad, Serbia, after successful testing in the Budapest region. Observations and model results were used in a climate change impact assessment with the purpose of identifying adaptation options, appraisal of adaptation options and integration of an adaptation action plan into the Feasibility Study of the WWTP construction. The results of the pluvial flood model for Novi Sad clearly suggested that it is important to consider pluvial flood risks and that protective measures have to be considered as part of the WWTP construction, both under current and future climate conditions. Moreover, novel estimates of drainage water intensities during heavy rains would advise the design of the simultaneously planned pumping station on the banks of the Danube. Combined, this clearly demonstrates the added value of the climate services and risk information delivered by the FDM also beyond the insurance sector, as well as its potential to support adaptation decision making with respect to infrastructural investments in Novi Sad.</p>
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Springer eBooks, 2015
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at - Automatisierungstechnik, 2021
This work describes an approach to calculate pedological parameter maps using hyperspectral remot... more This work describes an approach to calculate pedological parameter maps using hyperspectral remote sensing and soil sensors. These maps serve as information basis for automated and precise agricultural treatments by tractors and field robots. Soil samples are recorded by a handheld hyperspectral sensor and analyzed in the laboratory for pedological parameters. The transfer of the correlation between these two data sets to aerial hyperspectral images leads to 2D-parameter maps of the soil surface. Additionally, rod-like soil sensors provide local 3D-information of pedological parameters under the soil surface. The goal is to combine the area-covering 2D-parameter maps with the local 3D-information to extrapolate large-scale 3D-parameter maps using AI approaches.
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Computational Intelligence and Neuroscience, 2019
Human strategies for solving the travelling salesperson problem (TSP) continue to draw the attent... more Human strategies for solving the travelling salesperson problem (TSP) continue to draw the attention of the researcher community, both to further understanding of human decision-making and inspiration for the design of automated solvers. Online games represent an efficient way of collecting large amounts of human solutions to the TSP, and PathGame is a game focusing on non-Euclideanclosed-form TSP. To capture the instinctive decision-making process of the users, PathGame requires users to solve the problem as quickly as possible, while still favouring more efficient tours. In the initial study presented here, we have used PathGame to collect a dataset of over 16,000 tours, containing over 22,000,000 destinations. Our analysis of the data revealed new insights related to ways in which humans solve TSP and the time it takes them when forced to solve TSPs of large complexity quickly.
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The paper presents a system for automatic video surveillance based on paired cameras in a stereos... more The paper presents a system for automatic video surveillance based on paired cameras in a stereoscopic setup. The system combines motion based object segmentation with tracking, and integrates depth information to achieve robust performance. The methodology encompasses object segmentation based on a class of probabilistic neural networks, shadow removal, computation of a depth map, and object tracking based on an extended set of MPEG-7like feature descriptors including intensity, color, shape, motion and depth. To evaluate the approach, experiments were conducted on a set of outdoor sequences containing both rigid objects and moving persons. The results presented in the paper indicate that the proposed approach is able to achieve accurate segmentation and tracking and handle occlusions efficiently.
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... Fig. 4. Sample result frame for the original approach of Viola and Jones. 5 CONCLUSION. ... (... more ... Fig. 4. Sample result frame for the original approach of Viola and Jones. 5 CONCLUSION. ... (2000). 5. Chien, S., Huang, Y., Hsieh, B., Ma, S., Chen, L.: Fast video segmentation algorithm with shadow cancellation, global motion compensation, and adaptive threshold techniques. ...
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An increasing amount of publicly available geo-referenced data enables the identification of patt... more An increasing amount of publicly available geo-referenced data enables the identification of patterns of behavior, habits and movements of people. This paper presents results of a case study analysis based on data ser containing publicly available geo-referenced videos downloaded from YouTube, tagged as recorded in Africa. Our goal was to determine major routes of movement across the continent, to determine when people start their trip and the basic means of transportation used. The paper presents results of the analysis conducted on 113.157 unique YouTube records. We were able to identify major travel routes, directions, carriers and even flights favored by people traveling across Africa, information that is potentially valuable to disease outbreak management, airline industry, etc.
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Multispectral remote sensing data are rich source of information for precision agriculture and ea... more Multispectral remote sensing data are rich source of information for precision agriculture and earth observation that requires advanced methods for its interpretation. In this paper we addressed the problem of crop classification on multispectral images. The aim is to learn classifier to discriminate between 6 crop types. Different techniques in learning classifiers were employed in order to achieve better accuracy and generalization. We compared obtained results and selected those with potential practical usage. In the light of increasing demand for the extraction of information from remotely collected data, our work contributes to the development of remote sensing inagriculture.
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The paper presents an efficient and reliable approach to automatic people segmentation, tracking ... more The paper presents an efficient and reliable approach to automatic people segmentation, tracking and counting, designed for a system with an overhead mounted (zenithal) camera. Upon the initial block-wise background subtraction, k-means clustering is used to enable the segmentation of single persons in the scene. The number of people in the scene is estimated as the maximal number of clusters
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The Scientific World Journal, 2014
Video quality as perceived by human observers is the ground truth when Video Quality Assessment (... more Video quality as perceived by human observers is the ground truth when Video Quality Assessment (VQA) is in question. It is dependent on many variables, one of them being the content of the video that is being evaluated. Despite the evidence that content has an impact on the quality score the sequence receives from human evaluators, currently available VQA databases mostly comprise of sequences which fail to take this into account. In this paper, we aim to identify and analyze differences between human cognitive, affective, and conative responses to a set of videos commonly used for VQA and a set of videos specifically chosen to include video content which might affect the judgment of evaluators when perceived video quality is in question. Our findings indicate that considerable differences exist between the two sets on selected factors, which leads us to conclude that videos starring a different type of content than the currently employed ones might be more appropriate for VQA.
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Visual attention deployment mechanisms allow the Human Visual System to cope with an overwhelming... more Visual attention deployment mechanisms allow the Human Visual System to cope with an overwhelming amount of visual data by dedicating most of the processing power to objects of interest. The ability to automatically detect areas of the visual scene that will be attended to by humans is of interest for a large number of applications, from video coding, video quality assessment to scene understanding. Due to this fact, visual saliency (bottom-up attention) models have generated significant scientific interest in recent years. ...
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Papers by Dubravko Culibrk