Asymmetric stereoscopic video coding can take advantage of binocular suppression in human vision by representing one of the two views in lower quality.This paper proposes a bit allocation strategy for asymmetric stere...Asymmetric stereoscopic video coding can take advantage of binocular suppression in human vision by representing one of the two views in lower quality.This paper proposes a bit allocation strategy for asymmetric stereoscopic video coding.In order to improve the accuracy of bit allocation and rate control in the left view,a proportionalintegral-derivative controller is adopted.Meanwhile,to control the quality fluctuation between consecutive frames of the left view,a quality controller is adopted.Besides,a fuzzy controller is proposed to control the variation in quality between the left and right views by comparing the PSNR disparity of two views with a fixed threshold,which is used to quantize the binocular psycho-visual redundancy and adjust the quantization parameter (QP) of the right view correspondingly.The proposed algorithm has been implemented in H.264/AVC video codec,and the experimental results show its effectiveness in rate control while keeping a good quality for the left view,and fewer bits are allocated for the right view so that the overall bit rate is saved by 7.2% at most without the loss of subjective visual quality for stereoscopic video.展开更多
目的:分析2020年湖北省县级疾病预防与控制中心卫生人力资源配置的公平性并进行可视化呈现,为优化基层疾病预防控制机构人才队伍建设提供参考。方法:运用洛伦茨曲线(Lorenz curve)和基尼系数(Gini coefficient)衡量县级疾病预防控制中...目的:分析2020年湖北省县级疾病预防与控制中心卫生人力资源配置的公平性并进行可视化呈现,为优化基层疾病预防控制机构人才队伍建设提供参考。方法:运用洛伦茨曲线(Lorenz curve)和基尼系数(Gini coefficient)衡量县级疾病预防控制中心卫生人力资源配置公平性,运用莫兰指数(Moran s I)分析空间集聚效应,绘制LISA图对聚集效应进行可视化呈现。结果:卫生人力资源按常住人口和地理面积配置的Gini系数分别为0.53、0.85。按常住人口和地理面积配置的全局Moran s I分别为0.22、0.46,说明存在空间聚集性,通过计算局部Moran s I所绘制LISA图显示低—低型区域主要集中在人口密度高的鄂东、鄂中地区以及地理面积广的鄂西地区。结论:湖北省县级疾病预防控制中心卫生人力资源公平性有待提高,空间分布欠合理,政府在制定基层卫生人力资源政策时,需要同时考虑人口和空间因素规划卫生技术人员分布。展开更多
基金Supported by National Natural Science Foundation of China(No.60972054)National High Technology Research and Development Program of China("863"Program,No.2009AA011507)
文摘Asymmetric stereoscopic video coding can take advantage of binocular suppression in human vision by representing one of the two views in lower quality.This paper proposes a bit allocation strategy for asymmetric stereoscopic video coding.In order to improve the accuracy of bit allocation and rate control in the left view,a proportionalintegral-derivative controller is adopted.Meanwhile,to control the quality fluctuation between consecutive frames of the left view,a quality controller is adopted.Besides,a fuzzy controller is proposed to control the variation in quality between the left and right views by comparing the PSNR disparity of two views with a fixed threshold,which is used to quantize the binocular psycho-visual redundancy and adjust the quantization parameter (QP) of the right view correspondingly.The proposed algorithm has been implemented in H.264/AVC video codec,and the experimental results show its effectiveness in rate control while keeping a good quality for the left view,and fewer bits are allocated for the right view so that the overall bit rate is saved by 7.2% at most without the loss of subjective visual quality for stereoscopic video.
文摘目的:分析2020年湖北省县级疾病预防与控制中心卫生人力资源配置的公平性并进行可视化呈现,为优化基层疾病预防控制机构人才队伍建设提供参考。方法:运用洛伦茨曲线(Lorenz curve)和基尼系数(Gini coefficient)衡量县级疾病预防控制中心卫生人力资源配置公平性,运用莫兰指数(Moran s I)分析空间集聚效应,绘制LISA图对聚集效应进行可视化呈现。结果:卫生人力资源按常住人口和地理面积配置的Gini系数分别为0.53、0.85。按常住人口和地理面积配置的全局Moran s I分别为0.22、0.46,说明存在空间聚集性,通过计算局部Moran s I所绘制LISA图显示低—低型区域主要集中在人口密度高的鄂东、鄂中地区以及地理面积广的鄂西地区。结论:湖北省县级疾病预防控制中心卫生人力资源公平性有待提高,空间分布欠合理,政府在制定基层卫生人力资源政策时,需要同时考虑人口和空间因素规划卫生技术人员分布。
