宽带图像信号的直线提取.pdf

《宽带图像信号的直线提取.pdf》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。

1、第25卷第7期计算机学报VOl.25NO.72OO2年7月CINESEJ.COMPUTERSJuly2OO2宽带图像信号的直线提取王程文贡坚王润生(国防科技大学ATR国防科技重点实验室长沙41OO73)摘要该文用FPGA-DSP实现了宽带图像信号的实时直线提取适用于通常的视频图像信号和线阵CCD成像的连续图像信号.实现的直线提取模块已经用于高传输率的快速遥感图像处理系统.算法将直线提取中的参数计算分解为一个可以累加的过程从而简化了计算同时保证了直线参数的准确性在理论上证明了算法的完备性.文章的最后给出了实验结果及比较.关键词宽带图像信号直线提取实时处理可靠性F

2、PGA-DSP中图法分类号:TP391LineExtractionforBroadbandlmageSignalsWANGChengWENGOng-JianWANGRun-Sheng(ATRNCl0nClLC[07C07}NCl0nClUnlZe7Sl}0fDefenSeTechn0l0g}ChCngShC41OO73)AbstractAhardWareSOlutiOnfOrreal-timelineextractiOnfrOmbrOadbandimageSignalSiSpre-Sented.TherealiZatiOniSbaSedupOnFPGA-DSP

3、architecture.ThelineextractiOnmOdulecanprOceSSbOththecOmmOnframe-baSedVideOSignalSandthecOntinuOuSimageSignalSgeneraliZedbyalinearrayCCD.ThemOdulehaSbeenuSedinahigh-SpeedremOteSenSingSyStem.ThealgO-rithmOfthemOduleiSbaSedOnthegradientphaSeOfthegrayleVelimage.InthefOrmerlineex-tracti

4、OnalgOrithmSthreeSeparatedStepSareincludedWhicharetheedgedetectiOntheGP(gra-dientphraSe)grOupingandthelinefitting.IntheprOpOSedalgOrithmallthethreeStepSareper-fOrmedSimultaneOuSlyduringaScanOftheimage.ThebaSicprOceduralunitiStOScanlinebyline.TheLSEmethOdiSuSedtOfitthelineparameter;t

5、hecalculatiOniStranSfOrmedintOadiS-tinctcumulatiVeprOcedureWhichreduceSthecalculatiOnWithOutdegradingtheextractedlineS.ThepixelSareinputintOtheFPGAintheScanOrder.IneachScanlinethecOnnectedpixelSWhichhaVetheSamegradientphaSearegrOupedaSruncOde.TheDSPcOllectSthelineparame-terSfrOmther

6、uncOdeSbyacumulatiVeprOcedure.ThefinalparameterSOfthelinearefittedWhenthelineiSnOlOngerexpanded.TheuniVerSalityOfthealgOrithmiSprOVed.ThetOtaldelayOfthelineextractiOniSleSSthan5line-ScanperiOdSandOnlyalittlememOryiSuSedtOStOretheinfOrmatiOnabOutthecurrentScanningline.Theexperimental

7、reSultSandcOmpariSOniSpreSent-ed.KeywordsbrOadbandimageSignalSlineextractiOnreal-timerObuStFPGA-DSP对处理时间的要求不断提高实时处理成为一种趋1概述势.早期视觉主要是在像素级数据量大处理速度慢成为制约计算机视觉进入实用的瓶颈问题.在图随着技术的发展在计算机视觉的实际应用中像中线类型特征特别引人注目.直线是视觉感知的收稿日期:2OOO-11-2O;修改稿收到日期:2OO1-12-O5.王程1975年生博士研究生研究方向为图像理解与融合.E-mail:chWang-n

8、udt@263.net.文贡坚1972