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提出了三种基于子波变换的图像处理技术先对图像数据进行二维离散于波变换，根据子波变换后高。低频分量的特点，数据隐含技术将加密数据隐藏在于波变换图像的高频部分最低两位；加扰采用改变子波变换图像的低频部分，以此干扰复原图像质量；防伪是在原图像中改动某些象素值，使在子波变换图像的高频部分得到某种显而易见的标志，以此分辨图像的真伪．这三种技术处理都是基于子波变换后的图像，几乎没有附加传输信息量，所以基于子波变换的图像压缩技术对上述处理后的图像依然适用．
Three image processing techniques based on wavelet transform are proposed. Firstly, the image data is transformed into two-dimensional discrete wavelet transform, which is high after wavelet transform. Low-frequency components of the characteristics of data implicit technology to hide the encrypted data in the high-frequency part of the wave transform image of the lowest two; scrambling using wavelet transform the low-frequency part of the image, in order to interfere with the restoration of image quality; security is the original image changes Some pixel values make some obvious signs in the high frequency part of the wavelet transform image to distinguish the authenticity of the image. All these three kinds of technology processing are based on wavelet transform images, with almost no additional transmission of information, so the wavelet transform based image compression technology is still applicable to the above processed images.