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, a synthesized algorithm for flaw classification in ultrasonic guided waves signal is presented, in which Wavelet Transform is utilized in the process of noise suppression and envelop extraction, and the Probabilistic Neural Network (PNN) is introduced for flaw classification of the ultrasonic testing signal. Besides, in the process of feature extraction, the necessity of attenuation...
Based on the feature of CCD image forming, the internal principle of image forming is analyzed, and the loss of charge transfer is calculated by the Shockley - Read - Hall equation, in which the distribution function between the charge transfer is reconstructed. Rational polynomial interpolation algorithm is used to determine the unknown pixel points for the adjacent pixels that do not overcome the...
The paper presents a flame recognition algorithm under complex background. The light changes are mainly studied on the impact of the flame recognition system. An adaptive brightness threshold method which aimed at improving the speed and efficiency of the algorithm is proposed. The static and dynamic flame features are analyzed and the probability model of the flame detection is established based...
Hemorrhages are main evidences of background diabetic retinopathy and early detection is essential for an effective treatment. In this paper, a top-down strategy is applied to detect hemorrhages. After color normalization preprocessing stage, an evidence value for every pixel is calculated by SVM. The SVM classifier uses features extracted by combined 2DPCA instead of explicit image features as the...
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.