Thursday, November 20, 2014

brain01 e01 人类视觉运动感知系统由三个子系统组成 做相对论加速运动的电子会放出电磁辐射 • 电场和磁场交替变化扩散传播,真空中在任意线性方向上速率不变但其球波振面不是匀速递增的,而呈加速递增。这种加速递增是能量的作用

2 二阶运动
3 自然场景中的二阶运动
4 结 论
参考文献

[原文]
1 引 言
对生物视觉系统来说,运动感知是其基本功能之一,而对于计算机视觉研究而言,运动分析也是其中的一个重要内容。人类作为一种高级生物,对其视觉功能及实现机制的研究,涉及到心理学、神经生理学等多门学科。在人类视觉运动感知能力方面,目前为大多数视觉心理学研究者所认同的理论是:人类视觉运动感知系统由三个子系统组成[1,2],即一阶系统、二阶系统和三阶系统,其中,一阶运动系统主要感知亮度的运动,即所谓的一阶运动,二阶运动系统主要感知由对比度、空间频率、闪烁频率等特征定义的二阶运动,三阶运动系统则根据输入景象的显著性图计算由显著性特征定义的三阶运动。另一方面,现有的计算机视觉运动分析技术仅利用输入景象的灰度信息检测、估计和分析景象中存在的运动,可以认为是仅具备了一阶运动的感知能力。因此,将视觉心理学关于人类视觉运动感知的有关理论、模型等引入计算机视觉研究中,对于提高计算机视觉运动分析系统的适应性显然是有益的。进一步地,考虑到三阶运动系统理论较新,其计算算法仍不清楚,可将二阶运动的感知作为首要的研究工作。而研究计算机二阶运动感知的一个基本问题,就是通过对二阶运动的内在本质进行深入的分析,找出自然场景中所存在的二阶运动现象。因为只有自然场景中存在二阶运动现象,我们的研究才是有价值的,而这些二阶运动现象,也是研究成果的应用对象。文献[3]指出所有二阶运动可归结为如下三类:1)两信号的乘积;2)某种信号自身在成像平面上投影的变化;3)1、2两类共同作用的结果,但并未对自然场景中的二阶运动现象进行分析......

[摘要]
心理物理学实验中涉及的二阶运动信号已经被研究得非常多了,但自然场景中表现出的二阶运动现象还未得到深入研究。本文指出,自然场景中的光照变化、半透明前景、遮挡、非刚性物体运动等是产生二阶运动的主要因素,并进一步指出,与心理物理学实验中常用的纯一阶或二阶运动信号相比,自然场景中的一阶和二阶运动可能同时存在于相同的位置,这给运动的正确计算带来了困难。

[参考文献]
1 Zhong-Lin Lu, George Sperling, The Functional Architecture of Human Visual Motion Perception, Visual Research, 1995, 39(15):2697-2722.
2 Zhong-Lin Lu, George Sperling, Three-systems theory of human visual motion perception:review and update, J.opt.Soc.Am.A, 2001, 18(9):2331-2370.
3
3 David J. Fleet, Keith Langley, Computational analysis of non-Fourier motion, Vision Research, 1994,34(22): 3057-3079.
4 Steven S. Beauchemin, John L. Barron, The Frequency Structure of One-Dimensional Occluding Image Signals, IEEE Transactions on Pattern Analysis and Machine Intelligence, 2000, 22 (2): 200-206.
5 Charles Chubb, George Sperling, Drift-balanced random stimuli: a general basis for studying non-Fourier motion perception, Journal of the Optical Society of America, A, 1988, 5(11): 1986-2007.
6 Zanker, M.J, Theta motion:A paradoxical stimulus to explore higher-order motion extraction. Vision Research, 1993, 33, 553-569.
7 Rafael C. Gonzalez, Richard E. Woods 数字图像处理(第二版)电子工业出版社 北京 2003年


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The equity-only put-call ratios are both on buy signals again. A -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 marketreflections 的个人群组 (231 bytes) (10 reads) 11/28/2010 postreply 10:22:29
HL:IV/HV ratio of 1.36 and an extremely bullish put-call ratio o -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 marketreflections 的个人群组 (6266 bytes) (9 reads) 11/28/2010 postreply 13:41:03
最终幻想--东方文化复兴 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 marketreflections 的个人群组 (36 bytes) (15 reads) 01/11/2010 postreply 13:13:51
虚空的BLOG -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 marketreflections 的个人群组 (2148 bytes) (30 reads) 01/12/2010 postreply 19:45:42
"态函数状态随时间变化线性微分方程" google.cn -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 marketreflections 的个人群组 (3105 bytes) (14 reads) 01/13/2010 postreply 08:29:41
刘金刚 每一个具体事物,都与特定的尺度相连系 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 marketreflections 的个人群组 (9947 bytes) (14 reads) 01/14/2010 postreply 13:49:24
透过物理看人生:人生悟理 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 marketreflections 的个人群组 (3382 bytes) (12 reads) 01/14/2010 postreply 14:15:32
原子物理理论,最内壳为K壳(n=1),只能允许存在2个电子 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 marketreflections 的个人群组 (4046 bytes) (10 reads) 01/14/2010 postreply 14:21:52
量子数:主量子数,角量子数,磁量子数 自旋量子数ms -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 marketreflections 的个人群组 (2241 bytes) (9 reads) 01/14/2010 postreply 14:59:18
先轉換到時域去對時間積分,在轉換回空域對空間微分." -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 marketreflections 的个人群组 (2486 bytes) (9 reads) 01/09/2010 postreply 09:54:43
任何服从量子力学和相对论的理论必须服从CPT联合对称。 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 marketreflections 的个人群组 (853 bytes) (11 reads) 01/08/2010 postreply 13:24:42
"做相对论加速运动的电子会放出电磁辐射" -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 marketreflections 的个人群组 (9 bytes) (7 reads) 01/07/2010 postreply 05:02:23

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