To promote the robustness better, watermark algorithm based on DCT domain to embed in low frequency area and the watermark algorithm based on wavelet transform are studied.
为了更好的提高水印的鲁棒性,研究了把水印嵌入低频区域的基于DCT域的水印算法及基于小波变换的水印算法。
参考来源 - 数字水印算法及其应用的研究·2,447,543篇论文数据，部分数据来源于NoteExpress
信号主要分布在低频区域，而噪声主要分布在高频区域，同时图像的细节也分布在高频区域。
Signal is in low frequency, while noise in high frequency and minutia in image is also in this area.
水印检测时，分别在中频和低频区域提取水印并进行比较，采用效果较好的水印作为检测水印。
We extract watermarks in the intermediate frequency and low frequency region and compare them, using the extracted watermark which is better.
尽管这种活动主要存在于无线电声音频率分区的超低频区域，我们还是能够通过听觉来捕捉到它。
Existing predominantly, in the Very Low frequency part of the radio spectrum that corresponds with the audio frequency range, we can experience this activity as audible sound.
应用推荐