H.264 is a new video standardization in which fractional pixel motion compensation is applied in order to achieve more accurate motion description and higher compression efficiency. It,however,remarkably increase complexity in motion estimation process.
新的视频标准H.264为了获得更精确的运动向量和更高的压缩比,引入了分数像素运动补偿技术,但同时也增加了运动补偿过程的复杂度。
参考来源 - 一种适用于H.264的分数像素快速运动估计算法The proposed algorithm based on mathematical models of the motion compensated prediction errors. Unlike conventional quarter-pixel accuracy hierarchical motion estimation algorithm, proposed algorithm can avoid fractional-pixel interpolation and subsequent fractional-pixel search after integer-pixel accuracy motion estimation.
该算法基于运动补偿预测误差模型,与传统的1/4像素的分层运动估计算法不同,仅通过一步计算就能直接得到1/4像素精度的运动矢量,而且完全避免了运算量很大的分数像素内插运算和整像素搜索完成后的分数像素搜索。
参考来源 - H.264/AVC中快速1/4像素运动估计算法·2,447,543篇论文数据，部分数据来源于NoteExpress
另外，在分数像素搜索算法领域，提出了一种基于分类象限的分数像素搜索算法。
In addition, in the field of pixel search algorithms, an attempt based on classification quadrant pixel search algorithm is to be made.
这里，输入参数是应用于该效果的亮度，可以指定为绝对值，也可以是可用于像素的最大可能值的百分数。
Here, the input argument is the intensity above which to apply the effect, either specified as an absolute value, or as a percentage of the maximum possible value for the pixel.
基于百分数的动画——“动画现在可用em值、百分数值、像素(pixel)值。”
Percentage based animations - "animations can now be done using em values or percentages as well as pixel values."
应用推荐