odd even meaning in English

奇偶的

In the frequency domain , we analyse the information hiding technique based on dct . we present improved adaptive hiding method , odd even embedding technique , improved amalgamation and difference matrix hiding method in the dct domain . we describe the process of information embedding and extraction , and analyse the robust of the algorithms above in detail
在频率域内，我们研究了基于dct变换的信息隐藏技术，提出了改进的dct自适应隐藏算法、 dct域奇偶性嵌入算法和改进的融合算法，同时提出了差值矩阵的dct域隐藏算法，给出了这些算法的信息嵌入与恢复过程，并对频率域内的这些隐藏算法的鲁棒性进行了分析。