摘要
随机噪声是影响CCD器件输出信号信噪比的主要因素,它包括1/f分形噪声和白噪声。小波变换是一种具有一定时间和频率分辨力的方法,它能够较好地滤除分形噪声。阐述其基本原理,利用MatLab小波工具箱,选择合适方法实现CCD信号的小波消噪。结果表明了该方法的有效性。
The stochastic noise is the main factor which impacts the signal-to-noise ratio of CCD output signal. It contains 1If fractal noises and white noises. The wavelet transform is a kind of multi-resolution method on finite time and frequency and it can separate and remove fractal noises in effect. Introduced the basic theory, chose proper methods to implement de-noising of CCD signal made use of the MatLab wavelet toolbox. The result was proved the method is satisfying.
出处
《光学仪器》
2010年第6期53-56,共4页
Optical Instruments
