基于FPGA的九點(diǎn)最臨近插值算法的設(shè)計(jì)與實(shí)現(xiàn)

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中圖分類號(hào)：TP391.4；TN402 文獻(xiàn)標(biāo)識(shí)碼：A 文章編號(hào)：2096-4706（2025）12-0041-05

Design and Implementation of Nine-point Nearest Interpolation Algorithm Based on FPGA

GUAN Haoyang，LIU Dequan，MENG Xiangyi （SchoolofPhysicsand Electronic Information Engineering，Ningxia NormalUniversity， Guyuan756o99，China）

Abstract： InFPGAs，implementing the bilinear interpolation algorithm through pipelinesconsumes significantresources. This paper proposesanine-point nearestneighbor interpolationalgorithm.Byusing linearcalculation，thegrayscalevaluesof the nine pointsnearthemappedpositionof thepointtobemeasuredareobtained.Thepixelvalueofthepixel tobeinterpolatedisset equal tothe pixel valueofthe nearest pixel among the nine points tothe mapped position，thus completing the nine-poit nearest neighborinterpolationalgorith.ExperimentsshowthatinFPGAhardwareresources，thein-pointnearestneighbortepolation algorithm saves 21.2587% of the total block memory and 20.1413% of the total registers. In terms of image interpolation accuracy， the smoothness ratios for three different types of images are 109.632 3% 104.9660% and 106.5688% ，respectively，while the information entropyratiosare 99.9959% 0 99.946 1% ，and 99.933 2% ，respectively.Thenine-point nearest neighbor interpolation algorithm basicallymeets the requirements ofthe bilinear interpolation algorithm while reducing resource consumption.

Keywords： Field-Programmable Gate Array （FPGA）; nine-point nearest neighbor interpolation; average gradient amplitude; information entropy

0 引言

插值技術(shù)廣泛應(yīng)用于軍事、航空、醫(yī)學(xué)、消費(fèi)電子、手持設(shè)備和多媒體設(shè)備等領(lǐng)域的圖像處理中[1-2]，且現(xiàn)多采用FPGA實(shí)現(xiàn)視頻圖像的實(shí)時(shí)處理[3-]。（剩余5321字）