Speckle noise is supposed to be dependent on the signal intensity in the sense that the noise level increases with the brightness. Many approaches have been proposed to reduce the speckle effect in coherent imaging. Early works used the adaptive filters based on linear minimum mean square error by taking local statistics. The best-known filters include the Lee filter[1], Frost filter[2], Kuan f...

Over the last ten years, the use of nonlinear partial differential equations (PDE) methods in image processing has mushroomed into a major new topic in applied mathematics, with hundreds of publications and numerous symposia and workshops. A recent SIAM Conference on Imaging Science held in Boston in March 2002, attracted large numbers of participants and featured numerous talks devoted to this...

In this work a study of critical storage temperatures on pigment degradation of green beans (Phaseolus vulgaris, cvs. Perona and Boby) was conducted. In this way, green beans kept better quality at 4 degrees C than either 8 or 12 degrees C, maintaining a bright green color and good texture. Nevertheless, temperatures of 4 degrees C induced chilling injury (CI) after eight days of storage, which...

Von Hippel Lindau is an inherited disease which leads to tumor growth, including hemangioblastomas in the central nervous system and retina. No pharmacological treatment has demonstrated efficacy. Propranolol is a beta-blocker widely used in some neurological and cardiac diseases, and its safety is known. We present a patient diagnosed with Von Hippel Lindau disease who was treated with propran...

Malik Muhammad Khurram Sher Khan, MD, Malik Muhammad Humayun Sher Khan, MD, Aaron Tolan, MD, Darryl Elmouchi, MD, FHRS, Carlos E. Tavera, MD, FACP From the Grand Rapids Medical Education Partners, Michigan State University, Grand Rapids, Michigan, Frederik Meijer Heart & Vascular Institute, Spectrum Health, Grand Rapids, Michigan, and Department of Internal Medicine, Michigan State University C...

Phase contrast X-ray tomography (PCT) enables the study of systems consisting of elements with similar atomic numbers. Processing datasets acquired using PCT is nontrivial because of the low-pass characteristics of the commonly used single-image phase retrieval algorithm. In this study, we introduce an image processing methodology that simultaneously utilizes both phase and attenuation componen...

Heiko Milde a,∗, Thomas Guckenbiehl b, Andreas Malik c,1, Bernd Neumann a and Peter Struss d a Laboratory for Artificial Intelligence, University of Hamburg, Vogt-Koelln-Str. 30, 22527 Hamburg, Germany E-mail: {milde, neumann}@informatik. uni-hamburg.de b Fraunhofer-Institut IITB, Fraunhoferstr. 1, 76131 Karlsruhe, Germany E-mail: [email protected] c ESG Elektroniksystemund Logistik-GmbH, Germany...

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