公开(公告)号：US06912296B2

公开(公告)日：2005-06-28

申请号：US09783330

申请日：2001-02-15

Applicant: Woo-sung Sim

Inventor： Woo-sung Sim

IPC: H04N19/51 ,  G06K9/00 ,  H04N5/14 ,  H04N7/12 ,  H04N11/02 ,  H04N11/04

CPC classification number: H04N19/533

Abstract: A motion estimation method is provided. In the method, respective mean difference values for a current search point within a search block and neighboring search points within the search block are calculated. Then, motion estimation is performed around the current search point if the mean difference value of the current search point is smaller than the mean difference values of the neighboring search points. On the other hand, motion estimation is performed based on the mean difference values of at least some of the neighboring search points if the mean difference value of the current search point is not smaller than the mean difference values of at least one the neighboring search points. The motion estimation method of the present invention does not deteriorate the quality of pictures during image compression in contrast to conventional motion estimation methods and enhances image compression speed by reducing remarkably computational complexity.

Abstract translation: 提供了运动估计方法。 在该方法中，计算搜索块内的当前搜索点和搜索块内的相邻搜索点的各自的平均差值。 然后，如果当前搜索点的平均差值小于相邻搜索点的平均差值，则在当前搜索点周围执行运动估计。 另一方面，如果当前搜索点的平均差值不小于至少一个相邻搜索点的平均差值，则基于至少一些相邻搜索点的平均差值来执行运动估计 。 与传统的运动估计方法相比，本发明的运动估计方法不会降低图像压缩期间的图像质量，并且通过减少显着的计算复杂度来提高图像压缩速度。