In this paper we focus on the recognition of threedimensional objects captured by an active stereo vision sensor. The study is related to our research project Cyclope, this embedded sensor based on active stereo-visio...
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In this paper we focus on the recognition of threedimensional objects captured by an active stereo vision sensor. The study is related to our research project Cyclope, this embedded sensor based on active stereo-vision approach allows real time 3D objects reconstruction. Our medical application requires differentiation between hyperplastic and adenomatous polyps during 3D endoscopic imaging. The detection algorithm consists of SVM classifier trained on robust feature descriptors of a surfacic 3D point cloud extracted from the surface of studied object. We compared our feature extraction method with others. Experimental results were encouraging and show correct classification rate of approximately 97%. The work contains many techniques concerning image processing and system calibration and provides detailed statistics about the detection rate and the computing complexity.
This paper presents a new approach for controlling robotic hand or an individual robot by merely showing hand gestures in front of a camera. With the help of this technique one can pose a hand gesture in the vision ra...
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We consider the task of scene recognition, in the context of a robot-like navigation application, using a visual attention model of bottom-up saliency, invariant local features and visual landmarks, and the Nearest Ne...
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ISBN:
(纸本)9781601321541
We consider the task of scene recognition, in the context of a robot-like navigation application, using a visual attention model of bottom-up saliency, invariant local features and visual landmarks, and the Nearest Neighbor rule for classification. Experimental work shows that important reductions in the number of prototypes used by the NN classifier can be achieved using saliency maps. We also present a novel approach to extract visual landmarks that uses the model of bottom-up saliency to localize interest points, and color centiles plus local binary pattern histograms to collect local description of them. In the experiments, this later approach outperforms SIFT features by achieving similar recognition results but further reductions in the size of the database of prototypes, thus providing bigger savings in computational costs.
In the patternrecognition subspace method, the researcher has paid more attention to extract feature subspace, then expressed individual prototype with the training sample mean. Because the number of training sample ...
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The Gaussian mixture model (GMM) has been widely used in patternrecognition problems for clustering and probability density estimation For pattern classification however, the GMM has to consider two issues model stru...
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ISBN:
(纸本)9783642149214
The Gaussian mixture model (GMM) has been widely used in patternrecognition problems for clustering and probability density estimation For pattern classification however, the GMM has to consider two issues model structure in high-dimensional space and discriminative training for optimizing the decision boundary In this paper we propose a classification method using subspace GMM density model and discriminative training During discriminative training under the minimum classification error (MCE) criterion both the GMM parameters and the subspace parameters are optimized discriminatively Our experimental results on the MNIST handwritten digit data and UCI datasets demonstrate the superior classification performance of the proposed method
A primary task in 3D medical image segmentation is classifying voxels/pixels into an object or discrete blobs. This is used to create a 3D rendering for multiple objects and supports quantitative analysis for estimati...
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ISBN:
(纸本)9781601321541
A primary task in 3D medical image segmentation is classifying voxels/pixels into an object or discrete blobs. This is used to create a 3D rendering for multiple objects and supports quantitative analysis for estimating density, size and other morphometric parameters. A pulmonary embolism (PE) is a sudden blockage in the pulmonary artery which has very serious consequence which can be fatal in some of cases. A major clinical challenge is to correctly diagnosis patients with PE. In this paper we use a level set algorithm for 3D segmentation of pulmonary embolism from CT image datasets. In order to have a desirable segmentation of pulmonary embolism, we first apply a morphological erosion operation to reduce the connectivity between the pulmonary embolism and its neighbourhood and then apply the level set method to segment the pulmonary embolism. The results show the capability of the methodology to segment a PE from the surrounding tissues in 3D.
Nowadays in printing industry most of information processing steps are highly automated, except the last one-print quality assessment and control. We present a way to assess one important aspect of print quality, name...
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ISBN:
(纸本)9781424469208
Nowadays in printing industry most of information processing steps are highly automated, except the last one-print quality assessment and control. We present a way to assess one important aspect of print quality, namely the distortion of halftone dots printed colour pictures are made of. The problem is formulated as assessing the distortion of circles detected in microscale images of halftone dot areas. In this paper several known circle detection techniques are explored in terms of accuracy and robustness. We also present a new circle detection technique based on the fuzzy Hough transform (FHT) extended with k-means clustering for detecting positions of accumulator peaks and with an optional fine-tuning step implemented through unsupervised learning. Prior knowledge about the approximate positions and radii of the circles is utilized in the algorithm. Compared to FHT the proposed technique is shown to increase the estimation accuracy of the position and size of detected circles. The techniques are investigated using synthetic and natural images.
Feature extraction is an important issue in graphics retrieval. Local feature based descriptors are currently the predominate method used in image retrieval and object recognition. Inspired by the success of Haar feat...
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This article proposes a discrete particle swarm optimization (DPSO) for solution of the shortest path problem (SPP). The proposed DPSO adopts a new solution mapping which incorporates a graph decomposition and random ...
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This article proposes a discrete particle swarm optimization (DPSO) for solution of the shortest path problem (SPP). The proposed DPSO adopts a new solution mapping which incorporates a graph decomposition and random selection of priority value. The purpose of this mapping is to reduce the searching space of the particles, leading to a better solution. Detailed descriptions of the new solution and the DPSO algorithm are elaborated. Computational experiments involve an SPP dataset from previous research and road network from Malaysia. The DPSO is compared with a genetic algorithm (GA) using naive and new solution mapping. The results indicate that the proposed DPSO is highly competitive and shows good performance in both fitness value and processing time.
The proceedings contain 31 papers. The topics discussed include: extracting membership functions by ACS algorithm without specifying actual minimum support;application of TTCN-3 test language to testing information sy...
ISBN:
(纸本)9781424470037
The proceedings contain 31 papers. The topics discussed include: extracting membership functions by ACS algorithm without specifying actual minimum support;application of TTCN-3 test language to testing information systems in eHealth domain;Gabor wavelet for road sign detection and recognition using a hybrid classifier;on the study of overhead reduction for confused document encrypting schemes;interactive applications for mobile TV;A user level Markov model for service based CRRM algorithm;multi-criteria decision making (MCDM) network selection model providing enhanced QoS differentiation to customers;content-aware selective reliability for DCCP video streaming;pattern matching approach towards real-time traffic sign recognition;vehicle detection using morphological image processing technique;a novel coloring framework for grayscale images;and anticipation the consumed electrical power in smart home using evolutionary algorithms.
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