由于存储的对象是灰度图像，数字图像处理的方法就显得尤为重要。
Since the stored objects are gray images, digital image processing technique is of significance in volume holographic storage.
论述了数字图像处理的方法，以及视频压缩的必要性，压缩原理等。
Discuss digital image processing, necessary of video compressing and principle of video compressing.
基于短时傅里叶变换形成的三维谱图，采用数字图像处理的方法提取信号的特征。
A Surface EMG signal identification method based on short time Fourier transform is presented in this paper.
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