Flash floods represent a serious problem, especially in urban areas, due to the consequences of sediment transport and other phenomena affecting security and life quality of citizens. The availability of low-cost solu...
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ISBN:
(数字)9798350369250
ISBN:
(纸本)9798350369267
Flash floods represent a serious problem, especially in urban areas, due to the consequences of sediment transport and other phenomena affecting security and life quality of citizens. The availability of low-cost solutions for the real-time monitoring of such phenomena, with particular regards to the water level in urban areas, is of main interest for the realization of early warning systems aimed to predict and handle hazardous events. In this paper a water level monitoring system, based on a low-cost vision system and a dedicated signal processing implemented on an embedded hardware platform, is presented. Main advantage of the proposed approach resides in the adopted sensing methodology, which besides being low-cost, allows for a robust estimation of the water level, without the need for active (powered) ground devices. A proof-of-concept aimed prototype has been realized and its performances have been assessed by means of a dedicated experimental survey. Obtained results highlight high sensitivity and specificity in the water level recognition, with an accuracy close to 100% over the whole explored detection range.
Computer vision and multimedia information processing have made extreme progress within the last decade and many tasks can be done with a level of accuracy as if done by humans, or better. This is because we leverage ...
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Satellite imagery is often composed of diverse terrains like forest, desert, snow and exhibits haze, fog, thin clouds which require dehazing in order to make them analysisready. Onboard processing of satellite imagery...
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Satellite imagery is often composed of diverse terrains like forest, desert, snow and exhibits haze, fog, thin clouds which require dehazing in order to make them analysisready. Onboard processing of satellite imagery requires the algorithm's parameters to be fine-tuned depending on the type of terrain encountered. From the atmospheric light scattering model, the estimation of atmospheric light and transmission map is performed in single image dehazing method. This paper focuses on tuning an existing method the “Efficient image Dehazing with Boundary Constraints and Contextual Regularization method for satellite imagery”. A new image quality assessment method is introduced to enable fine-tuning the exponent of the algorithm. With the onset of onboard processing requirements, parallel implementation and faster imageprocessing methods are explored for small run-times.
Recognizing the emotion an image evokes in the observer has long attracted the interest of the community for its many potential applications. However, it is a challenging task mainly due to the inherent complexity and...
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ISBN:
(数字)9783031133213
ISBN:
(纸本)9783031133213;9783031133206
Recognizing the emotion an image evokes in the observer has long attracted the interest of the community for its many potential applications. However, it is a challenging task mainly due to the inherent complexity and subjectivity of human feelings. Such a difficulty is exacerbated in the domain of visual arts, mainly because of their abstract nature. In this work, we propose a new version of the artistic knowledge graph we were working on, namely Artgraph, obtained by integrating the emotion labels provided by the ArtEmis dataset. The proposed graph enables emotion-based information retrieval and knowledge discovery even without training a learning model. In addition, we propose an artwork emotion classification system that jointly exploits visual features and knowledge graph-embeddings. Experimental evaluation revealed that while improvements in emotion classification depend mainly on the use of visual features, the prediction of style, genre and emotion can benefit from the simultaneous exploitation of visual and contextual features and can assist each other in a synergistic way.
An enormous progress in the fields of Artificial Intelligence, machine Learning, and Computer vision is witnessed over the last decade, owing to a doubling in processing capacity per year, as well as a massive rise in...
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Hyperspectral imaging has become crucial in various domains, especially for the accurate detection of human veins in medical diagnostics, though managing the extensive data from hyperspectral (HS) images remains a cha...
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ISBN:
(数字)9798331541842
ISBN:
(纸本)9798331541859
Hyperspectral imaging has become crucial in various domains, especially for the accurate detection of human veins in medical diagnostics, though managing the extensive data from hyperspectral (HS) images remains a challenge. To improve data handling during analysis, dimensionality reduction methods are frequently utilized. This paper presents a dimensionality reduction method for HS images using HS image inter-band cross-correlation and the K-means clustering algorithm. The proposed method computes inter-band correlations across all bands of the input HS image, which form a 2D correlation matrix. Eigen-decomposition is applied to the resulting matrix, extracting its eigenvectors and eigenvalues. The k-mean clustering algorithm is then applied to a selection of eigenvectors representing the largest eigenvalues, splitting the eigenvectors into several clusters. The reduced HS image is generated by averaging each cluster's image bands. The proposed dimensionality reduction method together with the Support Vector machine (SVM) classifier was then used for vein detection in HS images. The HyperVein image dataset was used to generate experimental results. Experimental results were generated for the proposed method and Principal Component Analysis (PCA) and Folded PCA (FPCA). Results show the proposed method outperforms PCA and FPCA in most performance metrics.
This paper presents a novel approach for enhancing vehicle safety and navigation through an integrated system for lane detection, vehicle alignment, and automatic braking using visual feedback. Our proposed system emp...
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ISBN:
(数字)9798350355611
ISBN:
(纸本)9798350355628
This paper presents a novel approach for enhancing vehicle safety and navigation through an integrated system for lane detection, vehicle alignment, and automatic braking using visual feedback. Our proposed system employs advanced deep learning and computer vision techniques with real-time processing to detect the exact boundaries of lane and ensures precise vehicle movement within the lane. The system continuously analyses lane markings and modifies the vehicle's position to ensure optimal lane adherence by utilizing a combination of machine learning algorithms and camera-based imageprocessing. Additionally, the system incorporates an adaptive braking mechanism that identifies vehicles ahead using visual inputs. Furthermore, the jerks experienced during steering alignment can be greatly reduced by the suggested steering control system. The system's efficiency in various driving conditions is evidenced by its experimental simulation results, which also show improvements in collision avoidance and lane-keeping accuracy. This approach contributes to improved driving convenience and road safety by marking a substantial advancement in autonomous driving technologies.
The reconfiguration of machinevision systems heavily depends on the collection and availability of large datasets, rendering them inflexible and vulnerable to even minor changes in the data. This paper proposes a ref...
The reconfiguration of machinevision systems heavily depends on the collection and availability of large datasets, rendering them inflexible and vulnerable to even minor changes in the data. This paper proposes a refinement of Miller’s Cartesian Genetic Programming methodology, aimed at generating filter pipelines for imageprocessing tasks. The approach is based on CGP-IP, but specifically adapted for imageprocessing in industrial monitoring applications. The suggested method allows for retraining of filter pipelines using small datasets; this concept of self-adaptivity renders high-precision machinevision more resilient to faulty machine settings or changes in the environment and provides compact programs. A dependency graph is introduced to rule out invalid pipeline solutions. Furthermore, we suggest to not only generate pipelines from scratch, but store and reapply previous solutions and re-adjust filter parameters. Our modifications are designed to increase the likelihood of early convergence and improvement in the fitness indicators. This form of self-adaptivity allows for a more resource-efficient configuration of image filter pipelines with small datasets.
image restoration, a critical task in computer vision and imageprocessing, focuses on recovering degraded or damaged images to their original, high-quality state. This paper introduces an innovative approach to image...
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ISBN:
(数字)9798331505134
ISBN:
(纸本)9798331505141
image restoration, a critical task in computer vision and imageprocessing, focuses on recovering degraded or damaged images to their original, high-quality state. This paper introduces an innovative approach to image restoration using Generative Adversarial Networks (GANs). GANs, a prominent deep learning framework, consist of two neural networks-a generator and a discriminator-that compete to produce and evaluate realistic images. The generator creates images, while the discriminator distinguishes between real and generated ones, refining the generator's capability through adversarial training. Leveraging GANs' ability to learn complex image features, the proposed algorithm restores degraded images affected by noise, blur, and low resolution, producing high-quality, realistic results. Simulation outcomes demonstrate significant advancements in image restoration, showcasing GANs as a powerful tool for addressing challenges in this domain. The study underscores the potential of GANs in generating visually appealing restorations and advancing the state-of-the-art in imageprocessing and restoration tasks.
The distributed stream processing system suffers from the rate variation and skewed distribution of input stream. The scaling policy is used to reduce the impact of rate variation, but cannot maintain high performance...
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ISBN:
(纸本)9783031124266;9783031124259
The distributed stream processing system suffers from the rate variation and skewed distribution of input stream. The scaling policy is used to reduce the impact of rate variation, but cannot maintain high performance with a low overhead when input stream is skewed. To solve this issue, we propose Alps, an Adaptive Load Partitioning Scaling system. Alps exploits adaptive partitioning scaling algorithm based on the willingness function to determine whether to use a partitioning policy. To our knowledge, this is the first approach integrates scaling policy and partitioning policy in an adaptive manner. In addition, Alps achieves the outstanding performance of distributed stream processing system with the least overhead. Compared with state-of-the-art scaling approach DS2, Alps reduces the end-to-end latency by 2 orders of magnitude on high-speed skewed stream and avoids the waste of resources on low-speed or balanced stream.
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