This research work aims to develop an AI-based plant growth monitoring system using computer vision. By leveraging computer vision algorithms and artificial intelligence techniques, the system will enable real-time an...
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High dynamic range (HDR) imaging is a technique that allows an extensive dynamic range of exposures, which is important in imageprocessing, computer graphics, and computer vision. In recent years, there has been a si...
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High dynamic range (HDR) imaging is a technique that allows an extensive dynamic range of exposures, which is important in imageprocessing, computer graphics, and computer vision. In recent years, there has been a significant advancement in HDR imaging using deep learning (DL). This study conducts a comprehensive and insightful survey and analysis of recent developments in deep HDR imaging methodologies. We hierarchically and structurally group existing deep HDR imaging methods into five categories based on (1) number/domain of input exposures, (2) number of learning tasks, (3) novel sensor data, (4) novel learning strategies, and (5) applications. Importantly, we provide a constructive discussion on each category regarding its potential and challenges. Moreover, we review some crucial aspects of deep HDR imaging, such as datasets and evaluation metrics. Finally, we highlight some open problems and point out future research directions.
Failures of tailings dams have been happening lately. Due to the lack of laws on particular design criteria and stability requirements related monitoring during construction and maintenance, they are thought to be mor...
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Convolutional neural networks (CNNs) are a widely researched neural network architecture that has demonstrated exemplary performance in imageprocessing tasks and applications compared to other popular deep learning a...
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Classification and retrieval of medical images (MedIR) are emerging applications of computer vision for enabling intelligent medical diagnostics. Medical images are multi-dimensional and require specialised processing...
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Classification and retrieval of medical images (MedIR) are emerging applications of computer vision for enabling intelligent medical diagnostics. Medical images are multi-dimensional and require specialised processing for the extraction of features from their manifold underlying content. Existing models often fail to consider the inherent characteristics of data and have thus often fallen short when applied to medical images. In this paper, we present a MedIR approach based on the bag of visual words (BoVW) model for content-based medical image retrieval. When it comes to any medical approach models, an imbalance in the dataset is one of the issues. Hence the perspective is also considering a balanced set of categories from an imbalanced dataset. The proposed work on BoVW model extracts features from each image are used to train supervised machine learning classifier for X-ray medical image classification and retrieval. During the experimental validation, the proposed model performed well with the classification accuracy of 89.73% and a good retrieval result using our filter-based approach.
image segmentation models are often evaluated using measures of overlap and boundary deviation between a ground truth and a prediction. These measures do not indicate whether a prediction is an overestimation or under...
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In the current era, machinevision systems are being implemented widely in varied fields due to its key features, such as rapid processing, non-contact-based technology and in-situ measurements. This technology also p...
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In the current era, machinevision systems are being implemented widely in varied fields due to its key features, such as rapid processing, non-contact-based technology and in-situ measurements. This technology also possesses wide applications in the manufacturing sector. The surface texture properties of any machined component vary based on the manufacturing process, machining parameters, tool and machine conditions etc. As the surface texture of the machined components greatly influences the functional performance, it is vital to examine the surface characteristics. The surface texture of the machine component can be assessed by implementing a series of imageprocessing techniques on its speckle images. Speckle image refers to the randomly distributed granular pattern which is obtained when a rough or textured surface is illuminated using a laser beam. This paper focuses on estimating the orientation of the workpiece and examining the surface characteristics based on the post-processing of the speckle images. The hardened steel workpieces used in this investigation were ground by varying the process parameters and speckle images were obtained at 0°, 30°, 60° and 90° orientations. The shifted power spectral density of the ground sample images contains high-energy coefficients which mimic a line and its orientation varies based on the sample orientation. The Hough transform technique was applied to the binary image of shifted PSD to efficiently determine the orientation. Furthermore, correlations have been established between several surface texture characteristics and GLCM parameters with the surface roughness of ground samples.
Background: Recent advances in signal processing technology and computational power have increased the attention towards computer vision-based techniques in diverse applications such as agriculture, food processing, b...
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Background: Recent advances in signal processing technology and computational power have increased the attention towards computer vision-based techniques in diverse applications such as agriculture, food processing, biomedical, and military. Especially in agricultural and food processing, computer vision can replace most of the manual methods for screening of seed, grain and food quality. Scope and approach: The objective of present study is to review the recent advancements in computer vision techniques for predicting quality of various raw materials and food products. This review paper is focused on the quality determination of grains, vegetables, fruits, beverages, meat, sea food and edible oils using Digital imageprocessing (DIP). Several studies have reported the successful applications of DIP techniques for feature extraction, classification and quality prediction of foods. DIP algorithms are used to extract the significant features from images which are further used as input for machine learning (ML) algorithms to classify them based on different criteria. These feature extraction methods have been improved by Deep Learning (DL) algorithms. Features can be automatically extracted by DL algorithms resulting in higher accuracy. DL algorithms require huge data management and computational resources which can be a major limitation. Key findings and conclusion: A significant literature is available for quality estimation of food products by using computer vision algorithms, but they lack commercial exploitation. Android based applications have not yet been developed for this specific purpose. User friendly, low cost and portable devices equipped for quality estimation would be helpful for rapid quality measurement of food products in real time.
In recent years, great progress has been made on 2D and 3D image understanding tasks, such as object detection and instance segmentation. The recent trends in technology driverless cars are making a difference in dail...
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In this work, a coordinate positioning method based on machinevision with reference point assistance is proposed to apply to the size measurement for large rectangular plate parts. This method first obtains the coord...
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ISBN:
(纸本)9798350320428
In this work, a coordinate positioning method based on machinevision with reference point assistance is proposed to apply to the size measurement for large rectangular plate parts. This method first obtains the coordinate information of the reference point through circular detection, and uses the line detection and mean-shift clustering algorithm to fit the plate vertex information. Then the pixel coordinate relationship between the reference point and the plate vertex is used to solve the world coordinate of the plate vertex. Finally, the world coordinate of the plate vertex is used to calculate the length and width dimensions of the plate. Instead of other methods which unify coordinate system by moving cameras, this method uses reference point assistance system on measuring plate to unify the coordinate system, simplifying the difficulty of the unification of coordinate system and ensuring accuracy. Effectiveness of such method is verified by measuring rectangular plates with scales from centimeters to meters. The results showed that the measurement error could be controlled within 5 millimeters. In practical applications, the measurement accuracy has been much higher than the processing accuracy during the plate manufacturing, meeting the needs of size measurement.
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