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We propose an index of textural feature for oil spill segmentation based on X-band marine radar image. The radar image used in this paper were acquired on July 21, 2010, from the teaching-training ship, “YUKUN”, of Dalian Maritime University. Using adaptive median filter and Fields-of-Experts model, co-channel interference and small objects are cleaned separately. An index calculated by textural features...
We present a new descriptor for spontaneous facial expression recognition from videos acquired by a thermal sensor. Previous descriptors mostly compute features from RGB videos. It is difficult to process mixed and varied spontaneous expressions with a large ambiguity of facial appearances. In contrast, thermal imaging can measure autonomic activities, which are the physiological changes evoked by...
Zero-day attacks continue to challenge the enterprise network security defense. A zero-day attack path is formed when a multi-step attack contains one or more zero-day exploits. Detecting zero-day attack paths in time could enable early disclosure of zero-day threats. In this paper, we propose a probabilistic approach to identify zero-day attack paths and implement a prototype system named ZePro....
Synthetic Aperture Radar (SAR) images are widely used in land use classification. However, the influences of buildings may cause classification errors when SAR images are applied in urban areas. Aiming at the property of low Signal to Noise Ratio (SNR) of SAR images and the complexity of building textures, we obtained the initial segmentation using the Maximum likelihood (ML) algorithm based on the...
Many crowd abnormal motion detection methods in video surveillance have been proposed in resent years. However, most of them are based on low semantic features, such gray value, velocity and gradient. Usually, low semantic features contain weak discriminative information of the scene. In addition, these methods often ignore important information in time and space dimension. In this work, a high semantic...
Bone cancer is a pathologic condition which may occur for both humans and canines. This tumor develops quickly from within the bone tissue and become painful as it grows outward. A metastasized bone tumor may be cured by amputation, otherwise it will be fatal. The current diagnostic imaging methods for bone cancer are X-rays, Computed Tomography scan (CT scan), and Magnetic Resonance Imaging (MRI)...
Head pose is an important indicator of a person's attention, gestures, and communicative behavior with applications in human computer interaction, multimedia and vision systems. In this paper, we present a novel head pose estimation system by performing head region detection using the Kinect [2], followed by face detection, feature tracking, and finally head pose estimation using an active camera...
Evaluation of different weather conditions provides a first step support for many different applications of outdoor video analysis and computer vision. In this paper, a simple but effective classification method on visual effects of different weather conditions is proposed. Due to the complex manifestations of weather conditions, we firstly provide a two-stage classification scheme. Then, we extract...
A background estimation system, which integrates pixel-level features with a region-level one and combines short-term and long-term analysis of videos in outdoor illumination variations, is proposed for accurate foreground detection. Firstly, we discuss autocorrelation-based features for identification of the presence of foreground and outdoor illumination variations in short-term sequences, and propose...
The friction welding supersonic C scanned pictures will introduce the noise in process of gatherring and conversion, and the disturbance of the noise to the image effects image's quality, which brought the enormous difficulties for image characteristic information extraction and analysis. Therefore, this article will propose a denoising analysis method, which obtains the scanned picture to the experiment...
This paper proposes a promising palmprint image enhancement algorithm. Under the constraint that keeps original characteristic of palmprint, the method improves contrast of images, in order to extract features from palmprint by Scale Invariance Feature Transformation (SIFT) descriptor. However, the existing image enhancement algorithms can hardly yield SIFT feature from low resolution palmprint images,...
A model based on texture feature and fuzzy logic algorithm was constructed to discriminate oil spills from look-alike phenomena in the SAR images. Statistics texture feature of SAR images were extracted and used as the input parameters in the fuzzy logic system. The texture features consisted of entropy second order, angular second moment, contrast and inverse difference moment of dark objects. The...
Oil spills in the ocean are one of major environmental concerns, especially in the costal waters. Many satellite sensors, including optical sensors and microwave sensors, have been used to detect oil spills which often exhibit different feature in the satellite images compared with the surrounding waters. In this study, we used texture feature analysis to detect oil spill using MODIS and SAR images...
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