为了增强人体骨髂运动细节的表达,提出了基于关键帧分类的虚拟人运动插值方法。此方法以人体骨髂间夹角为动作特征,在运动捕获数据的关键帧基础上,将关键帧集合根据其运动特性的不同划分为3类;普通关键帧、关键关键帧、摆动关键帧。在插值阶段依据关键帧类型分别采用线性插值、二次多项式插值和三次多项式插值计算中间帧,最终获得反应运动细节的关键帧动画。实验结果表明,该方法能在最终合成的人体动画中较好地模拟手臂摆动和变速运动的运动效果。
An high bitrate information hiding algorithm is improved, and a scheme of video in video is implemented for secret video information transmission. Experimental results show that improved information hiding algorithm saves 20% time than the original algorithm, and the host video in which is embedded numerous auxiliary information has little visual quality decline, PSNR Y of host video only degrades 0.22 dB in average, and the average bit error rate of hidden information is 0. 015%.