In order to realize a noise octave analysis by software, a digit weight method based on FFT is proposed.
为了利用软件实现噪声倍频程分析，提出了一种基于FFT的数字计权方法。
Using the method, digit weight and digit system error modification for virtual noise octave analyzer can be realized.
利用这一方法，可以实现虚拟噪声分析仪的数字计权和数字式系统误差修正。
This paper analyse the image enhancement, the binarization, the noise abatement, the thinning, the normalization and the feature extraction on the handwritten digit recognition.
本文首先对手写数字图像的图像灰度化、二值化、去噪、细化、归一化、特征提取等预处理过程进行分析；
This paper analyse the image enhancement, the binarization, the noise abatement, the thinning, the normalization and the feature extraction on the handwritten digit recognition.
本文首先对手写数字图像的图像灰度化、二值化、去噪、细化、归一化、特征提取等预处理过程进行分析；
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