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To observe and control cultivation processes, optical sensors are used increasingly. Important parameters for controlling such processes are cell count, cell size distribution, and the morphology of cells. Among turbidity measurement methods, imaging procedures are applied for determining these process parameters. A disadvantage of most previously developed(More)
For coding of videophone sequences at very low bit rates, model-based coding is investigated. In a model-based coder, the human face in the videophone sequence is described by a three-dimensional (3D) face model. At the beginning of the videophone sequence, the model has to be adapted automatically to the size, position and orientation of the real face(More)
Animal cell culture is widely used in biotechnology for the production of many biological products. In situ microscopes acquire images directly from cell suspensions and analyze the images in matters of cell concentration, cell size distribution and cell morphology. Their applicability was already proven for yeast and suspended mammalian cell cultivations.(More)
For coding of videophone sequences at very low bit rates, model-based coding is investigated. In a model-based coder, the human face in the videophone sequence is described by a three-dimensional (3D) face model. At the beginning of the videophone sequence, the model has to be adapted automatically to the shape, position and orientation of the real face(More)
An algorithm for motion estimation of articulated 3D objects for object–based analysis–synthesis coding (OBASC) is presented. For motion estimation an articulated object is first decomposed automatically into flexibly connected object– components. Each rigid 3D object–component is assumed to be connected to the object by spherical joints. Then, the 3D(More)