The application of B-spline based interpolation in real-time image enlarging processing
Kaiyu Li, Wang Wen-dong, Zheng Kai-wen, Wenbo Liu, Guili Xu · 2014
Efficient algorithms for the continuous representation of a discrete signal in terms of B-splines and for interpolative signal reconstruction have been proposed in this paper. It analyzes the relationship between the degree of the spline and the quality of the interpolation. By taking the z-transforms of the sampled B-spline functions, a fast interpolation algorithm based on digital filters of IIR and FIR is proposed, which is quite suitable for hardware realization with its ideal processing result and high-speed computing. Through the example of image enlargement, the application of cubic B-spline based interpolation in image processing is investigated. It designs a fast and high-quality image enlargement and display system based on FPGA. It is proved in the experiment to be qualified for the real-time image processing.