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.
This paper concentrates on the analysis of features extracted through the application of wavelet packet transform for B-mode ultrasound liver images. For years, the scientific community has been trying to figure out an effective method of feature extraction for revealing texture details and the succeeding classifications. Methods of feature extraction can be roughly classified into three categories:...
This paper describes a road obstacle classification system that recognizes both vehicles and pedestrians in far-infrared images. Different local and global features based on Speeded Up Robust Features (SURF) were investigated and then selected in order to extract a discriminative signature from the infrared spectrum. First, local features representing the local appearance of an obstacle, are extracted...
In this paper, we consider the problem of LSB matching steganalysis in grayscale images and provide a new detection method. We model the matching embedding as a kind of image degradation with certain additive pulse noise proportional to the embedding rate. We get the restored image by wavelet denoising as the cover imagepsilas estimation. Then we extract the features of 1D statistical grayscale histogram...
In this paper, a method is proposed to diagnose faults of marine main engine shaft. Since empirical studies show various faults of fuel oil system induces the variation of vibration signals, we propose to diagnose faults of marine main engine shaft using vibration signal from engine. The proposed method consists of three steps. First, a wavelet analysis method is used to characterize the power spectrum...
In this paper, a novel approach is proposed to diagnose faults of marine main engine cylinder cover. Considering vibration signal is highly related with various faults of cylinder cover, we propose to diagnose faults of marine main engine cylinder cover based on vibration signal from engine. First, a wavelet analysis method is used to characterize the power spectrum of the vibration signal. Next,...
According to the characteristics of ultrasonic echo signals, a new features extraction method was presented base on calculating wavelet entropy of decomposed signals. The advantages and disadvantages of wavelet transform, wavelet packet transform and Gabor transform in signal decomposing were discussed. The separability of features achieved by three methods above was compared, and the wavelet packet...
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.