[1] R. Strzodka and M. Rumpf. Level set segmentation in graphics hardware. In IEEE International Conference on Image Processing, pages 1103-1106, 2001.
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Implicit active contours are a very flexible technique in the segmentation of digital images. A novel type of hardware implementation is presented here to approach real time applications. We propose to exploit the high performance of modern graphics cards for numerical computations. Vectors are regarded as images and linear algebraic operations on vectors are realized by the graphics operations of image blending. Thus, the performance benefits from the high memory bandwidth and the economy of command transfers, while the restricted precision does not infect the qualitative behavior of the level set propagation. Here we pick up a first order solver for the basic implicit level set model and present an implementation performing at 2ms for an explicit timestep on a 128x128 image.