In this paper we study effective approaches to create thumbnails input images. Since a thumbnail will eventually be presented to and perceived by a human visual system, a thumbnailing algorithm should consider several important issues in the

只有在图像区域非常低的视频信号中才含有高频频谱。因此,在数字视频信号处理,根据频谱分配比特的比特数的因素:包含大量的区域分布较低的频谱信息的比特数含有较高的频谱分配较低量的信息,和图像质量并没有明显的损伤,达到压缩率的目的。然而,所有这些都是为了在低熵(熵)的情况下实现有效的编码。(The coefficients of the DCT domain motion compensation error or the original image information convert into