Recovering the camera's response function has wide applica-tion in imageprocessing andcomputer *** computational approach using multiple differently exposed photographs is based on solving a constrained linear l...
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ISBN:
(纸本)9781450364607
Recovering the camera's response function has wide applica-tion in imageprocessing andcomputer *** computational approach using multiple differently exposed photographs is based on solving a constrained linear least square problem and can only recover the function up to a scaling *** this paper,we present a novel experiment based technique to recover the true response curves of spe-cific *** method first measures the average pixel intensities of a neutrally-grey cardboard for the full range of the shutter speed and gain control values of the ***-ter a simple data smoothing procedure,the camera's response function is recovered through simple table *** have implemented our technique on different kinds of sensors and show that it works *** new technique recover the actual range of the sensor and is more accurate than the computa-tional *** procedure is easy to set up and simple to implement which will be useful for developing applications such as High Dynamic Ranging(HDR) imaging.
In recent trends, computervision applications have seen massive implementation of supervised learning with convolutional neural networks. In this paper, we have analyzed image classifiers and their classification acc...
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Tracking and identifying human actions are most of the problems that attract many researchers in the field of computervision. In this problem, it is important to extract features in such a way that the information is...
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The detection of encoder grating engraved-line uniformity, is important in the encoder production debugging. Aiming at the shortcomings of the traditional method of signal processing using the encoder output, the real...
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Humans depend on their vision quality to check whether the fruit is ripe or unripe. They grade the maturity level of a fruit based on their vision based features that lead to inaccuracy, inconsistency and inefficiency...
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computervision is the science that aims to contribute a similar, if not better, capability to a machine or computer. It is also interested with the idea and technology for building artificial systems that secure info...
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image classification being widely applied to computervision is an im-age processing method to distinguish the different category targets according to the different features reflected by the image information. BOW-SVM...
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image classification being widely applied to computervision is an im-age processing method to distinguish the different category targets according to the different features reflected by the image information. BOW-SVM is a relative-ly typical image classification method with higher precision, however, it's unsatis-factory in operation performance. To improve the performance and precision more efficiently, a high-efficiency image classification method based on HOG-PCA is proposed. First of all, it is to make the feature whitening by extracting the Histogram of Oriented Gradients(HOG) features, secondly, make the random down-sampling for the scale unification, afterwards, adopt the principal component analysis(PCA) for feature mapping and finally make the nearest neighbor classification through the minimum two-order norm determination. In the experiment, the proposed method is realized and tested on the P ASCAL 2012 data set through C++ on the basis of OPENCV and Darwin to compare the precision and operation performance of this method and BOW-SVM method;according to the experiment, the proposed has higher precision and better operation performance.
Deep Leaning of the Neural Networks has become one of the most demanded areas of Information Technology and it has been successfully applied to solving many issues of Artificial Intelligence, for example, speech recog...
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ISBN:
(纸本)9781538628744
Deep Leaning of the Neural Networks has become one of the most demanded areas of Information Technology and it has been successfully applied to solving many issues of Artificial Intelligence, for example, speech recognition, computervision, natural language processing, data visualization. This paper describes the developing the deep neural network model for image recognition and a corresponding experimental research on an example of the MNIST data set. Some practical details for creating the Deep Neural Network andimage recognition in the Caffe Framework are given as well.
Facial expression is a significant form of non-verbal communication for human being. It includes much important information about the feeling, the mental and the emotional state of a person which can be useful in seve...
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ISBN:
(纸本)9781450352901
Facial expression is a significant form of non-verbal communication for human being. It includes much important information about the feeling, the mental and the emotional state of a person which can be useful in several real-world applications and fields like imageprocessing andcomputervision. Face can be seen as a composition of micro-patterns of textures. Over the last decades, LBP operator, which shown its robustness in extracting useful features characteristics from an image, has been successfully applied in diverse range of problems including facial expression recognition. Nowadays, many LBP variants have been proposed in the literature. This paper reviews 22 LBP-like descriptors and provides a comparative analysis on facial expression recognition problem using two benchmark databases, the Japanese female facial expression (JAFFE) and Cohn-Kanade (CK) databases. The experiments show that several of the evaluated methods achieve performances that are better than those recorded by the state-of-the-art systems. Recognition rates of 97.14% and 100% have been reached on JAFFE and Cohn-Kanade databases respectively.
Detection of crop disease and growth state have always been the key to ensure the yield and quality of agricultural products. The algorithms, which are in the field of pattern recognition or image recognition, have be...
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