The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The last decade has witnessed a dramatic growth of social networks, such as Twitter, Sina Microblog, etc. Messages/short texts on these platforms are generally of limited length, causing difficulties for machines to understand. Moreover, it is rarely possible for users to read and understand all the content due to the large quantity. So it is imperative to cluster and extract the viewpoints of these...
Kernel principal component analysis (KPCA) is a powerful feature extraction technique. For character recognition, however, the computation cost of KPCA is too high because of much larger sample size of each class. A novel two-stage feature extraction method DL-KPCA that based on dictionary learning and KPCA is proposed for character recognition. In the first stage, with the dictionary learning method...
A novel identification approach for identifying photographic images (PIM) and photorealistic computer graphics (PRCG) is proposed by using multifractal spectrum features of photo response non-uniformity noise (PRNU). 8 dimensions of mul-tifractal spectrum features of PRNU are extracted to represent the subtle differences between them, and the identification is carried out by using a support vector...
Expression changes, especially the mouth open will bring errors to the calculation of geodesic distance using classical method. In order to address the issue, an novel approach to distance calculation between points based on geodesic is presented in this paper. Firstly, a square is obtained by fitting four key points around the mouth. If the projected line between two marks is intersected with the...
During the development of hand-held character recognition device, the conflict of limited resources and high demanding for real-time makes the traditional classification method fails to meet the requirements of both speed and recognition rate at the same time. Thus, Support Vector Machines (SVM) classification algorithm is applied to the Embedded Character Recognition System. The SVM theory for pattern...
Disease categorization based on medical image is a very challenge problem, because disease anatomical distribution on image is complex. In this paper, we describe an approach of region feature extraction, which is to partition the image into different regions and extract the local features in each region, to classify different diseases. Our experiments are based on a database consisting of 50 samples...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.