自动化学报2013，Vol.39Issue(4)：407-417,11.DOI:10.3724/SP.J.1004.2013.00407
一种改进的低成本自适应双三次插值算法及VLSI实现
An Improved Low-cost Adaptive Bicubic Interpolation Arithmetic and VLSI Implementation
摘要
Abstract
A novel scaling algorithm is proposed which consists of a bicubic interpolation and an adaptive sharpening filter. The proposed sharpening filter is added to mitigate the blurring effects existing in bicubic interpolation methods. We also verify the scaling quality by taking into account the adaptive technique. Furthermore, we present both the procedures of filtering before and after interpolation in order to reduce the overall computing time. Compared with the previous reported techniques, our method performs better in terms of both quantitative evaluation and visual quality. To achieve the goal of real time and low cost, we describe a pipelined VLSI architecture for the implementation of the algorithm. The very large scale integration (VLSI) architecture of our image scaling processor contains 695 logic elements (LEs) and yields a processing rate of about 165 MHz by using field-programmable gate array (FPGA) technology. Our proposed architecture reduces the amount of gates by 36.8% while achieves an average peak signal-to-noise ratio (PSNR) increase of 1.5 dB in image quality.关键词
双三次插值/图像缩放/拉普拉斯变换/自适应/超大规模集成电路/现场可编程逻辑器件Key words
Bicubic interpolation/ image scaling/ Laplacian transform/ adaptive/ very large scale integration (VLSI)/field-programmable gate array (FPGA)引用本文复制引用
庞志勇,谭洪舟,陈弟虎..一种改进的低成本自适应双三次插值算法及VLSI实现[J].自动化学报,2013,39(4):407-417,11.基金项目
广东省战略新兴产业关键技术产业化专项(2011168014,2011912004),广东省省部产学研重点科技项目(2011A090200037)资助 （2011168014,2011912004）
