基于FPGA动态可重构的高速、高质量的图像放大

为了能高速、高质量地进行图像放大，提出了一种以硬件方法完成高阶图像插值运算来实现图像放大的新方法。该方法为了保证图像放大后的质量，采用了3次B-样条来对图像放大后的像素点灰度值进行插值运算，并提出一种基于IIR和FIR数字滤波器的3次B-样条插值法的高速实现方案。另外，为了能在系统中实现不同倍数图像放大，系统中还引入了基于FPGA的动态可重构技术，即通过实时地改变FPGA的配置，以实现不同的算法。同时还针对256灰度级图像设计出一种基于FPGA的高速、高质量的硬件图像放大及显示系统。

Fast, High quality Enlargement of Image Based on Dynamic Reconfigurable FPGA

In order to realize fast,high quality enlargement of image, this paper introduces a new approach to achieve the high order interpolation and realize the enlargement of images by means of hardware. In order to ensure high quality of the enlarged image, the paper adopts the cubic B spline interpolation to calculate the gray of pixels of the enlarged image. What is more, the paper develops an IIR(infinite impulse response) based and FIR(finite impulse response) based digital filter to realize fast cubic B spline interpolation. In order to realize different multiple enlargement of image in the system, the dynamic reconfigurable design based on FPGA(field programmable gate array) has been applied in the system, which can real time reconfigurate FPGA so as to achieve the different arithmetic. And it designs a fast and high quality image enlargement and displays system based on dynamic reconfigurable FPGA for the images in 256 gray levels.