Michael A. Wirth

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— In this paper we investigated the applicability of commonly used white-balancing algorithms to restoring faded photographic colour slides. We have used three sets of synthetic data that simulated colour damage in Kodak Ektachrome slides, as well as three sets of real digitized faded Kodak Ektachrome slides. We have restored all the data sets using nine(More)
The largest single feature on a mammogram is the skin-air interface, or breast contour. Extraction of the breast contour is useful for a number of reasons. Foremost it allows the search for abnormalities to be limited to the region of the breast without undue influence from the background of the mammogram. Segmentation of the breast-region from the(More)
One of the caveats of the process of designing image processing algorithms is that they are often tested on insignificant numbers of images. This paper discusses the influence of mammogram databases on the performance evaluation of algorithms. We hope to demonstrate that the use of extensive collections of mammograms with varied characteristics to assess(More)
Writing comprehensive, focused notes during a lecture can be a challenging task for students. They often spend most of the time actually writing notes with little time to reflect on the material presented in the lecture, or indeed to ask questions. Electronic lecture notes are a clear and concise electronic form of lecture notes provided openly to students.(More)