光电工程
光電工程
광전공정
OPTO-ELECTRONIC ENGINEERING
2013年
1期
100-105
,共6页
三维弹痕测量%小波去噪%十六步相移技术%位相主值计算
三維彈痕測量%小波去譟%十六步相移技術%位相主值計算
삼유탄흔측량%소파거조%십륙보상이기술%위상주치계산
3D bullet trail measurement%wavelet denoising%sixteen-step phase-shifting technique%main phase computing
在三维弹痕测量系统中,为了获取较高的测量精度,为此本文提出一种采用十六步相移技术的条纹图处理算法.首先分析了物体三维形貌相位分布获取原理,然后对采集到的弹痕图像进行自适应维纳滤波,去除一部分系统噪声,再利用小波变换对原始图像进行3层sym4小波分解去噪,本系统在小波软阈值分析法的基础上,加入了3层的小波系数分解,同时结合十六步相移法进行相位主值的计算.实验结果表明,弹痕条纹图的位相值曲线更加平滑,原始图像条纹图位相高度偏差的最大值为1.631μm,在经过十六步相移技术处理后,位相主值最大偏差值仅为0.8674μm,对本系统的精度提高奠定了基础.
在三維彈痕測量繫統中,為瞭穫取較高的測量精度,為此本文提齣一種採用十六步相移技術的條紋圖處理算法.首先分析瞭物體三維形貌相位分佈穫取原理,然後對採集到的彈痕圖像進行自適應維納濾波,去除一部分繫統譟聲,再利用小波變換對原始圖像進行3層sym4小波分解去譟,本繫統在小波軟閾值分析法的基礎上,加入瞭3層的小波繫數分解,同時結閤十六步相移法進行相位主值的計算.實驗結果錶明,彈痕條紋圖的位相值麯線更加平滑,原始圖像條紋圖位相高度偏差的最大值為1.631μm,在經過十六步相移技術處理後,位相主值最大偏差值僅為0.8674μm,對本繫統的精度提高奠定瞭基礎.
재삼유탄흔측량계통중,위료획취교고적측량정도,위차본문제출일충채용십륙보상이기술적조문도처리산법.수선분석료물체삼유형모상위분포획취원리,연후대채집도적탄흔도상진행자괄응유납려파,거제일부분계통조성,재이용소파변환대원시도상진행3층sym4소파분해거조,본계통재소파연역치분석법적기출상,가입료3층적소파계수분해,동시결합십륙보상이법진행상위주치적계산.실험결과표명,탄흔조문도적위상치곡선경가평활,원시도상조문도위상고도편차적최대치위1.631μm,재경과십륙보상이기술처리후,위상주치최대편차치부위0.8674μm,대본계통적정도제고전정료기출.
In 3D bullet trail measurement system, in order to obtain high measurement accuracy, a sixteen-step phase-shifting technique fringe image processing algorithms is presented. First, the principle of phase distribution and achievement in 3D morphology is analyzed. And then, adaptive Wiener filter is used to remove partial noise in collected bullet trail images and sym4 wavelet decomposition is used to process the original image by three-layer to remove system noise. The proposed system introduces three-layer decomposition of the wavelet coefficients based on soft threshold to calculate phase combined with sixteen-step phase-shifting technique. The results show that the phase curve of bullet fringe is smoother, the maximum height deviation of original fringe image is 1.631μm, and the deviation is 0.867 4μm by sixteen-step phase-shifting, which improves the system accuracy.
