Abstract Dynamic tomography reconstructs a time activity curve (TAC) for every voxel assuming that the algebraic form of function is known priori. The derived from analysis compartmental models depends nonlinearly on nonnegative parameters to be determined. Direct methods apply fitting in iteration step. Because iterative nature maximum likelihood–expectation maximization (ML–EM) reconstruction...

Geometric-semantic coherent building models are demanding in many geoscience applications. Conventional modeling methods often rely on successive roof plane segmentation and fitting. The subsequent reconstruction procedure is difficult to assure topologic consistency geometric accuracy. This paper starts with a library of predefined or primitives, including pyramid, gable, hip, etc. We propose ...

Fitting statistical models is a widely employed technique for the segmentation of medical images. While this approach gives impressive results for simple structures, shape models are often not flexible enough to accurately represent complex shapes. We present a fitting approach, which increases the model fitting accuracy without requiring a larger training data-set. Inspired by a local regressi...