This paper studies the relation between the discrete cosine transform(DCT) and the discrete hartley transform(DHT). A fast algorithm to calculate the coefficient on two dimension discrete cosine transform(2DDCT) is proposed based on the algorithm of DHT.

• 研究二维离散余弦变换与二维离散哈脱莱变换间的关系；基于二维哈脱莱变换算法；提出一种计算二维离散余弦变换系数的快速算法.