Improving Clustering Algorithms for Image Segmentation using Contour and Region Information

In image segmentation, clustering algorithms are very popular because they are intuitive and, some of them, easy to implement. For instance, the k-means is one of the most used in the literature, and many authors successfully compare their new proposal with the results achieved by the k-means. However, it is well known that clustering image segmentation has many problems. For instance, the number of regions of the image has to be known a priori, as well as different initial seed placement (initial clusters) could produce different segmentation results. Most of these algorithms could be slightly improved by considering the coordinates of the image as features in the clustering process (to take spatial region information into account). In this paper we propose a significant improvement of clustering algorithms for image segmentation. The method is qualitatively and quantitative evaluated over a set of synthetic and real images, and compared with classical clustering approaches. Results demonstrate the validity of this new approach

Omnidirectional Depth Computation from a Single Image

Omnidirectional cameras offer a much wider field of view than the perspective ones and alleviate the problems due to occlusions. However, both types of cameras suffer from the lack of depth perception. A practical method for obtaining depth in computer vision is to project a known structured light pattern on the scene avoiding the problems and costs involved by stereo vision. This paper is focused on the idea of combining omnidirectional vision and structured light with the aim to provide 3D information about the scene. The resulting sensor is formed by a single catadioptric camera and an omnidirectional light projector. It is also discussed how this sensor can be used in robot navigation applications

Plane-to-plane positioning from image-based visual servoing and structured light

In this paper we face the problem of positioning a camera attached to the end-effector of a robotic manipulator so that it gets parallel to a planar object. Such problem has been treated for a long time in visual servoing. Our approach is based on linking to the camera several laser pointers so that its configuration is aimed to produce a suitable set of visual features. The aim of using structured light is not only for easing the image processing and to allow low-textured objects to be treated, but also for producing a control scheme with nice properties like decoupling, stability, well conditioning and good camera trajectory

Colour image of the thorax and abdomen

This is an image taken from Anatomy tv, an interactive resource for teaching and learning in anatomy and physiology which the University Library subscribes to. This image may not be changed, but you may take a copy and present it with other materials and resources you are using so long as they are password protected for access by members of the University only. "All products and all images within the products are protected by copyright. The products and images can only be used for private educational purposes, unless a specific license is purchased for any other usage. For any commercial usage of the images, please contact Primal Pictures Limited. The products allow members of the University of Southampton to ‘copy and paste’ all of the text as well as the images in the 3D-model window and all of the slides. These can then be pasted into nearly any other word-processing or graphics program, including Powerpoint. These resources can be made available to members of the University of Southampton via a password-protected service. This again is designed solely as a service for private educational uses. Like any publisher, Primal Pictures protects itself against copyright infringement. Please do contact Debra Morris in the University Library before using these resources to ensure that conditions are respected. ©Primal Pictures Limited 2007

How can be strategically improved the international attractivity of the touristic sector in Colombia?

Durante el desarrollo de este trabajo de grado, se describe la posibilidad de incrementar estratégicamente el potencial de atraer visitantes extranjeros al país. Colombia es un lugar lleno de biodiversidad, cultura y belleza; pero algunas circunstancias como la guerra, la mala imagen a nivel internacional y la pobre infraestructura turística, han detenido el crecimiento de los indicadores turísticos. La implementación de diferentes estrategias distintivas para posicionar la industria turística y para lograr el mejoramiento continuo, como la definición de planes de contingencia para luchar en contra de la violencia y la inseguridad, el mejoramiento de las condiciones de infraestructura, la mejor capacitación y entrenamiento de todas las personas relacionadas con este segmento de mercado y también los esfuerzos por difundir en mayor proporción información clara y eficiente sobre Colombia; son algunos de los principales objetivos que deben ser alcanzados para incrementar el nivel de atractividad del sector para visitantes internacionales, y también, estas estrategias contribuirán al mejoramiento de los indicadores de desempeño del sector y del país en general.

Internet for Image Searching

"Internet for Image Searching" is a free online tutorial to help staff and students in universities and colleges to find digital images for their learning and teaching. The emphasis of the tutorial is on finding copyright cleared images which are available free; facilitating quick, hassle-free access to a vast range of online photographs and other visual resources. "This tutorial is an excellent resource for anyone needing to know more about where and how to find images online. The fact that it concentrates on copyright cleared images will make it even more valuable for busy learning and teaching professionals, researchers and students alike. It will also serve to inspire confidence in those needing to use images from the web in their work." (Sharon Waller of the Higher Education Academy).

CV workshop - Projecting a professional image

Slides and activity sheets to accompany a set of practical workshop activities which help participants identify some of their individual skills, as the basis for a future coursework to produce a CV

Intute tutorial on image searching

Would you like to learn how to use the Internet to find copyright cleared images for your work, quickly and efficiently?

JISC Digital media internet for image searching

This webpage provides links to image banks and sources of photos which are usable for educational purposes.

Performance Tuning Burger King's Brand Image

Advertising Design Management's Presentation - Burger King

Projecting a professional image

Talk given by Diana Fitch from Careers Destinations, for COMP1205.

Le français par l'image : propuestas didácticas de utilización del vídeo en el aula. 'El francés por la imagen'.

Se ofrece material didáctico audiovisual para la enseñanza de la lengua francesa para ser utilizado en el aula. Está organizado en 15 propuestas didácticas. Incluye ficha pedagógica y ficha de trabajo.

Enhancement of oxidation rate of a-Si nanoparticles during dehydrogenation

Oxidation of amorphous silicon (a-Si) nanoparticles grown by plasma-enhanced chemical vapor deposition were investigated. Their hydrogen content has a great influence on the oxidation rate at low temperature. When the mass gain is recorded during a heating ramp in dry air, an oxidation process at low temperature is identified with an onset around 250°C. This temperature onset is similar to that of hydrogen desorption. It is shown that the oxygen uptake during this process almost equals the number of hydrogen atoms present in the nanoparticles. To explain this correlation, we propose that oxidation at low temperature is triggered by the process of hydrogen desorption