Synthetic Aperture Radar (SAR) texture is an important derived variable for improving land cover classification accuracy from SAR data. However, a number of factors affect the amount and quality of texture information obtained from radar data and these include: the window size, data type, the size of grey level quantisation, displacement and the look direction. The main aim of this study was to...

In this work, we propose an unsupervised approach for crowd scene anomaly detection and localization using a social network model. Using a window-based approach, a video scene is first partitioned at spatial and temporal levels, and a set of spatio-temporal cuboids is constructed. Objects exhibiting scene dynamics are detected and the crowd behavior in each cuboid is modeled using local social ...

We present improvements to algorithms for efficient exponentiation. The fractional window technique is a generalization of the sliding window and window NAF approach; it can be used to improve performance in devices with limited storage. Window NAF splitting is an efficient technique for exponentiation with precomputation for fixed bases in groups where inversion is easy (e.g. elliptic curves).

This paper deals with the sub-task of PAN 2017 Author Identification, which is to detect style breaches for unknown number of authors within a single document in English. The presented model is an unsupervised approach that will detect style breaches and mark text boundaries on the basis of different stylistic features. This model will use some classical stylistic features like POS analysis and...

In order to effectively improve fusion quality, a novel multi-focus image fusion approach with sparse decomposition is proposed. The source images are decomposed into principal and sparse components by robust principal component analysis (RPCA) decomposition. A sliding window technique is applied to inhibiting blocking artifacts. The focused pixels of the source images are detected by using the...

An autonomous unmanned underwater vehicle is a type of marine self-propelled robot that executes some specific mission and returns to base on completion of the task. In order to successfully execute the requested operations, the vehicle must be guided by an effective navigation algorithm that enables it to avoid obstacles and follow the best path. Architectures and principles for intelligent dy...

Breakage of DHS guide wire during surgery and its migration into the pelvis through the hip joint is a rare complication and its removal can be very challenging for the surgeon. We share our experience of a similar case wherein we used an ‘iliofemoral’ approach to successfully remove the broken transfixing guidewire from the hip joint. Although iliofemoral approach is similar to the lateral win...

for disparity estimation is introduced. In the proposed approach the size of the matching window is adapted according to the spatial variability of the matching areas. That is, the window size is constrained by the variations of the image intensity. A modified semivariogram function is proposed to measure the spatial variability of concerned sampling positions. Results of computer experiments a...