光学学报
光學學報
광학학보
ACTA OPTICA SINICA
2000年
12期
1617-1622
,共6页
解相%频域处理%频谱%小波变换。
解相%頻域處理%頻譜%小波變換。
해상%빈역처리%빈보%소파변환。
phase demodulation%processing in frequency domain%spectrum%wavelet transform
提出一种基于小波变换的频域解相技术。对调制栅线图像进行小波变换,生成被测物体背景图像,两幅图像相减得到相对变形栅线图像,分析基频谱,由于背景成分基本消除,利于有用频带的提取,可以实现大梯度变化曲面和复杂形面的自动轮廓测量。
提齣一種基于小波變換的頻域解相技術。對調製柵線圖像進行小波變換,生成被測物體揹景圖像,兩幅圖像相減得到相對變形柵線圖像,分析基頻譜,由于揹景成分基本消除,利于有用頻帶的提取,可以實現大梯度變化麯麵和複雜形麵的自動輪廓測量。
제출일충기우소파변환적빈역해상기술。대조제책선도상진행소파변환,생성피측물체배경도상,량폭도상상감득도상대변형책선도상,분석기빈보,유우배경성분기본소제,리우유용빈대적제취,가이실현대제도변화곡면화복잡형면적자동륜곽측량。
A novel phase demodulation technique in frequency domain based on wavelet transform is introduced. Handling the original modulated grating image with wavelet transform, the object background image is created. And subtracting these two images, a relative distorted grating image is obtained. The background components in spectrum of the relative image are basically removed and the useful one is leached easily. The steep gradient and complex object shapes can be measured automatically with this technique.