wxGRASS: una interfaz gráfica de usuario para la integración de diversos programas libres para SIG

This paper presents a Graphical User Interface, developed with python and the graphic library wxpython, to GRASS GIS. This GUI allows to access several modules with a graphic interface written in Spanish. Its main purpouse is to be a teaching tool, that is the reason way it only allows to access several basic put crucial moludes. It also allows user to organize the elements presented to stress the aspects to be resalted in a particular working sesion with the program

On the way to solve lighting problems in underwater imaging

A major obstacle to processing images of the ocean floor comes from the absorption and scattering effects of the light in the aquatic environment. Due to the absorption of the natural light, underwater vehicles often require artificial light sources attached to them to provide the adequate illumination. Unfortunately, these flashlights tend to illuminate the scene in a nonuniform fashion, and, as the vehicle moves, induce shadows in the scene. For this reason, the first step towards application of standard computer vision techniques to underwater imaging requires dealing first with these lighting problems. This paper analyses and compares existing methodologies to deal with low-contrast, nonuniform illumination in underwater image sequences. The reviewed techniques include: (i) study of the illumination-reflectance model, (ii) local histogram equalization, (iii) homomorphic filtering, and, (iv) subtraction of the illumination field. Several experiments on real data have been conducted to compare the different approaches

Microcalcification evaluation in computer assisted diagnosis for digital mammography

In order to develop applications for z;isual interpretation of medical images, the early detection and evaluation of microcalcifications in digital mammograms is verg important since their presence is often associated with a high incidence of breast cancers. Accurate classification into benign and malignant groups would help improve diagnostic sensitivity as well as reduce the number of unnecessa y biopsies. The challenge here is the selection of the useful features to distinguish benign from malignant micro calcifications. Our purpose in this work is to analyse a microcalcification evaluation method based on a set of shapebased features extracted from the digitised mammography. The segmentation of the microcalcifications is performed using a fixed-tolerance region growing method to extract boundaries of calcifications with manually selected seed pixels. Taking into account that shapes and sizes of clustered microcalcifications have been associated with a high risk of carcinoma based on digerent subjective measures, such as whether or not the calcifications are irregular, linear, vermiform, branched, rounded or ring like, our efforts were addressed to obtain a feature set related to the shape. The identification of the pammeters concerning the malignant character of the microcalcifications was performed on a set of 146 mammograms with their real diagnosis known in advance from biopsies. This allowed identifying the following shape-based parameters as the relevant ones: Number of clusters, Number of holes, Area, Feret elongation, Roughness, and Elongation. Further experiments on a set of 70 new mammogmms showed that the performance of the classification scheme is close to the mean performance of three expert radiologists, which allows to consider the proposed method for assisting the diagnosis and encourages to continue the investigation in the sense of adding new features not only related to the shape

Computer-mediated communication and time pressure induce higher cardiovascular responses in the preparatory and execution phases of cooperative tasks

Resumen tomado de la publicaci??n

Nano Electronics and Computer Science Research Group

This is the website for the Nano Research group based at the University of Southampton ECS department, and details current research topics and the people connected with these. It shows some of the current research topics undertaken at the center, and gives an outline of what can be done for post graduate courses.

Using Macs at WSA (basics)

Materials on creating files and folders on the Mac Operating System (10.5 / Leopard). Creating folders to organise your files is very important, this will help you to keep track of your work, create simple backups (making copies of data so that these additional copies may be used to restore the original after a data loss event.) and much much more. Whatever computer you like using, they all work on the basic principle of using folders to organise files. Files and folder should have meaningful names do not use special Characters like £$%&! and never use a ‘.’ except before a file extension. It is best to start creating your folders in the documents (or my documents) folder and not on your desktop, it gets untidy.

How to convert a Word file to PDF using Adobe Acrobat on an iSolutions workstation.

This PowerPoint provides a step-by-step guide to the process of converting a document (such as your thesis) from Word to PDF.

Computer Misuse Act Presentation

This is one of two presentations we have produced for the resource set part of the INFO2009 Assignment 2 Group Poster.

Data Protection and Computer Misuse Act Reference List

This is the reference lists for the resource set we have produced for the INFO2009 Assignment 2 Group Poster.

Data Protection and Computer Misuse Act Poster

This is the poster about the resource set we have produced for the INFO2009 Assignment 2 Group Poster.

Data Protection and Computer Misuse Act Poster (PDF Version)

This is the poster about the resource set we have produced for the INFO2009 Assignment 2 Group Poster.

Resource for UK Computing Law - INFO2009 - 09/10

Zip file containing source code and database dump for the resource