Automatic detection of polypoid skin lesions: The squash sign

“Earlier detection of malignant melanoma can save lives. Automatic in-vivo methods of melanoma detection including smart-phone applications are now available, but specificity is low, i.e. too many benign lesions are detected as possible melanomas. Polypoids, elevated and rounded lesions are one class of benign lesions. These raised lesions with piecewise circular borders, predominantly intradermal nevi and cutaneous polyps (IDNs), are always benign. Variegated coloring present in polypoid lesions can lead physicians to perform an unneeded biopsy. Contact dermatoscope plates with gel squash these lesions, leaving a “squash sign” marker of benignancy which can be automatically detected. We present a method to automatically recognize the squash sign in raised benign skin lesions. This method is a two-stage process. First an algorithm is implemented to narrow down upon the region of interest which is the area where the squash sign may possibly be present in the lesion. In the second stage, image features are extracted from the lesion as a whole and the region of interest described above, to mathematically model these benign lesions. The data set for training and testing set consisted of a variety of images containing intradermal nevi and cutaneous polyps, malignant melanomas and other benign lesions. All the images had a spatial resolution of 1024 by 768. It was observed that the mathematical model was able to recognize over 64% of the intradermal nevi and cutaneous polyps on both the training and testing sets. This method has the potential to reduce the number of false diagnoses in automatic melanoma detection devices”--Abstract, page iv

Supporting meetings in Virtual Worlds with enhanced Communication features

With the rapid growth in the use of computer for addressing our day to day needs and the increased use of technology in our daily life, we cannot imagine a day without the use of the internet for our routine needs. Today, without any doubt in our mind we can say that technology has taken over human lives completely. A new era of computing has evolved where computers and the internet have a huge impact on everyone‟s life. A lot of research has been done and is in process for generated tools and devices which will bring the world even closer. It started with telephone in the last century and since then till today there have been huge number of tools and devices that try to give the users who are geographically far away a sense of co-presence. The latest technology making rounds is the Virtual World technology. The popularity and impact of online virtual worlds is worth making a note of. It needs to be seen now, how does it really betters people lives. One such persistent virtual world is Second Life. The number of users and organizations associated with this world is impressive. It provides users with the right amount of collaborative content with a set of communication features. Second Life provides its users with unique meeting support which gives them a sense of co-presence achieved nowhere else. This thesis focuses upon the kind of meeting support, collaborative content and the communication features provided by the virtual world that will allow its users to avoid the need for travel and long distance meetings can be achieved successfully in such an environment. This will help the travel time to be converted to productive office time as well as the costs involved in such meetings can also be reduced drastically. Such kind of meetings will also prove eco-friendly as they will save on fuel consumption and benefit from reduced pollution