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.
In this paper, the concept of algebraic accuracy of zero-crossing based edge detector is proposed. Combined with the optimal criteria for zero-crossing based edge detector, a high-accuracy edge detector for step edges is given. Based on this, some Laplacian operator based masks are given. For extracting the edges objectively, an unsupervised selection strategy of the threshold is introduced. Finally,...
In this paper, we propose an improved edge detection method based on the Laplacian operator. The improved edge detector is constructed by combining the optimal criteria for zero-crossing based edge detector and the edge-matching model for Laplacian operator-based edge detector. In order to extract the edges objectively, an unsupervised thresholding technique is introduced. Finally, the validity of...
As an alternative to the transmitted reference (TR-) ultra-wideband (UWB), the dual-carrier frequency shifted reference (FSR-) UWB and its high-rate multi-carrier counterparts have been recently studied. In this paper, we consider a lowrate multi-carrier differential modulation and its low-complexity receiver designs. We prove that such a multi-carrier system actually results in a pulse position modulation,...
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.