In this paper, a non-linear adaptive control method based on SO(3) for the quadrotor attitude tracking is proposed. Distinct from other control methods on Euclidean space, the controller proposed is developed on SO(3)...
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Besides their decorative purposes,vehicle manufacturer logos can provide rich information for vehicle verification and classification in many applications such as security and information ***,unlike the license plate,...
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Besides their decorative purposes,vehicle manufacturer logos can provide rich information for vehicle verification and classification in many applications such as security and information ***,unlike the license plate,which is designed for identification purposes,vehicle manufacturer logos are mainly designed for decorative purposes such that they might lack discriminative features ***,in practical applications,the vehicle manufacturer logos captured by a fixed camera vary in *** these reasons,detection and recognition of vehicle manufacturer logos are very challenging but crucial problems to *** this paper,based on preparatory works on logo localization and image segmentation,we propose a size-self-adaptive method to recognize vehicle manufacturer logos based on feature extraction and support vector machine(SVM)*** experimental results demonstrate that the proposed method is more effective and robust in dealing with the recognition problem of vehicle logos in different ***,it has a good performance both in preciseness and speed.
In this paper, we present a large scale off-line handwritten Chinese character database-HCL2000 which will be made public available for the research community. The database contains 3,755 frequently used simplified Ch...
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This paper presents an audio event classification algorithm which automatically classifies an audio event as footstep,glass breaking,gunshot or scream mainly for surveillance ***,the Gabor feature of the audio spectro...
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ISBN:
(纸本)9781509012473
This paper presents an audio event classification algorithm which automatically classifies an audio event as footstep,glass breaking,gunshot or scream mainly for surveillance ***,the Gabor feature of the audio spectrogram is extracted,there are two kinds of Gabor features,namely global Gabor feature and local Gabor *** we use Principal Components Analysis(PCA) and Linear Discriminant Analysis(LDA) to compress the feature dimension,finally the K nearest neighbor classifier(KNN) is used to recognize audio *** carried out extensive experiments on the clean and noisy audio *** results demonstrate that the algorithm is able to guarantee a recall of 96.1%on clean sets and is proved to be more effective than traditional methods.
Image classification is a fundamental problem in computer vision and patternrecognition. Feature extraction is often regarded as the key for classifying images. Traditional ways rely on handcrafted features heavily, ...
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There are two important research topics in the field of Music Information Retrieval (MIR). One is how to improve the robustness of features and the other is how to speed up the retrieval process. This paper improved t...
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This paper presents a novel humming feature extraction algorithm based on locality statistical analysis to tackle the problem of the instability of humming features in the query by humming（QBH） *** carrying out stat...
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ISBN:
(纸本)9781509012473
This paper presents a novel humming feature extraction algorithm based on locality statistical analysis to tackle the problem of the instability of humming features in the query by humming（QBH） *** carrying out statistics to humming notes sequences in both longitudinal vocal range distribution and horizontal temporal variation distribution,we can obtain the locality statistical humming *** we concatenate several features using the idea of N-gram to improve feature *** the framework of QBH based on Locality Sensitive Hashing（LSH）,the proposed method has achieves 86%top-1 rate and 92%top-5 rate in the experiment,indicating the effectiveness of the method.
Speaker adaptive test normalization （ATnorm） is the most effective approach of the widely used score normalization in text-flldependent speaker verification, which selects speaker adaptive impostor cohorts with an e...
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Speaker adaptive test normalization （ATnorm） is the most effective approach of the widely used score normalization in text-flldependent speaker verification, which selects speaker adaptive impostor cohorts with an extra development corpus in order to enhance the recognition performance. In this paper, an improved implementation of ATnorm that can offer overall significant advantages over the original ATnorm is presented. This method adopts a novel cross similarity measurement in speaker adaptive cohort model selection without an extra development corpus. It can achieve a comparable performance with the original ATnorm and reduce the computation complexity moderately. With the full use of the saved extra development corpus, the overall system performance can be improved significantly. The results are presented on NIST 2006 Speaker recognition Evaluation data corpora where it is shown that this method provides significant improvements in system performance, with relatively 14.4% gain on equal error rate （EER） and 14.6% gain on decision cost function （DCF） obtained as a whole.
Traditional multi-class classification methods based on Fisher kernel combine generative models such as Gaussian mixture models(GMMs)of all the classes ***,the combination generates high dimensional feature vectors an...
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Traditional multi-class classification methods based on Fisher kernel combine generative models such as Gaussian mixture models(GMMs)of all the classes ***,the combination generates high dimensional feature vectors and leads to large *** this paper,a new classification method is *** method adopts an intelligent feature space selection strategy by clustering similar Gaussian mixtures in order to reduce the feature *** classification experiments show that the proposed method is more accurate and effective with less computation compared with traditional methods.
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