摘要
分析了小波变换的滤波性质,用小波变换对数字全息图进行了去除零级像的处理.与频域滤波的处理结果相比,小波变换可以显著提高再现图像的对比度;与空域模板法相比,小波变换可以更有效地消除零级光周边特定空间频率的系统噪声.
The filtering property of wavelet transform is discussed,and the eliminating of zero-order image in digital hologram with wavelet transform is performed.Comparing with frequency filtering,wavelet transform can get better contrast of image.Comparing with spatial filering,wavelet transform is a more effective method to eliminating systematic noise at some spatial frequency which is nearby the zero-order image.
出处
《苏州大学学报（自然科学版）》
CAS
2010年第2期56-60,共5页
Journal of Soochow University(Natural Science Edition)
基金
江苏省自然科学基金(BK2009601)
关键词
数字全息
小波变换
图像去噪
digital holography
wavelet transform
image denoising
