TY - CHAP T1 - Classifying Glaucoma with Image-based Features from Fundus Photographs T2 - Pattern Recognition Y1 - 2007 A1 - Rudriger Bock A1 - Jörg Meier A1 - Georg Michelson A1 - László Gábor Nyúl A1 - Joachim Hornegger ED - Fred A Hamprecht ED - Christoph Schnorr ED - Bernd Jähne AB -

Glaucoma is one of the most common causes of blindness and it isbecoming even more important considering the ageing society. Because healing of died retinal nerve fibers is not possible early detection and prevention is essential. Robust, automated mass-screening will help to extend the symptom-free life of affected patients. We devised a novel, automated, appearance based glaucoma classification system that does not depend on segmentation based measurements. Our purely data-driven approach is applicable in large-scale screening examinations. It applies a standard pattern recognition pipeline with a 2-stage classification step. Several types of image-based features were analyzed and are combined to capture glaucomatous structures. Certain disease independent variations such as illumination inhomogeneities, size differences, and vessel structures are eliminated in the preprocessing phase. The “vessel-free” images and intermediate results of the methods are novel representations of the data for the physicians that may provide new insight into and help to better understand glaucoma. Our system achieves 86 % success rate on a data set containing a mixture of 200 real images of healthy and glaucomatous eyes. The performance of the system is comparable to human medical experts in detecting glaucomatous retina fundus images.

JF - Pattern Recognition T3 - Lecture Notes in Computer Science PB - Springer Verlag CY - Heidelberg SN - 978-3-540-74933-2 N1 - ScopusID: 38149039478doi: 10.1007/978-3-540-74936-3_36 JO - LNCS ER - TY - CHAP T1 - A subiteration-based surface-thinning algorithm with a period of three T2 - Pattern Recognition Y1 - 2007 A1 - Kálmán Palágyi ED - Fred A Hamprecht ED - Christoph Schnorr ED - Bernd Jähne AB -

Thinning on binary images is an iterative layer by layer erosionuntil only the "skeletons" of the objects are left. This paper presents an efficient parallel 3D surface-thinning algorithm. A three-subiteration strategy is proposed: the thinning operation is changed from iteration to iteration with a period of three according to the three deletion directions. © Springer-Verlag Berlin Heidelberg 2007.

JF - Pattern Recognition T3 - Lecture Notes on Computer Science PB - Springer Verlag CY - Heidelberg, Germany SN - 978-3-540-74933-2 N1 - ScopusID: 38149004908 JO - LNCS ER -