基于FPGA的九点最临近插值算法的设计与实现OA

In FPGAs,implementing the bilinear interpolation algorithm through pipelines consumes significant resources.This paper proposes a nine-point nearest neighbor interpolation algorithm.By using linear calculation,the grayscale values of the nine points near the mapped position of the point to be measured are obtained.The pixel value of the pixel to be interpolated is set equal to the pixel value of the nearest pixel among the nine points to the mapped position,thus completing the nine-point nearest neighbor interpolation algorithm.Experiments show that in FPGA hardware resources,the nine-point nearest neighbor interpolation algorithm saves 21.258 7%of the total block memory and 20.141 3%of the total registers.In terms of image interpolation accuracy,the smoothness ratios for three different types of images are 109.632 3%,104.966 0%,and 106.568 8%,respectively,while the information entropy ratios are 99.995 9%,99.946 1%,and 99.933 2%,respectively.The nine-point nearest neighbor interpolation algorithm basically meets the requirements of the bilinear interpolation algorithm while reducing resource consumption.