E********r
发帖数: 99 | 1 看到下面这片摘要,里面提到voxel，请问是什么？
谢谢。
Nano-stereolithography process for precise and effective 2D and 3D nano/micr
ofabrication
Park, Sang-Hu (Department of Mechanical Engineering, Korea Advanced Institut
e of Science and Technology); Lim, Tae-Woo; Yang, Dong-Yol Source: Nami Jish
u yu Jingmi Gongcheng/Nanotechnology and Precision Engineering, v 4, n 3, Se
ptember, 2006, p 199-207ISSN: 1672-6030
Publisher: Editorial Office of Nanotechnology and
Abstract: Since it has emerged as a new technology, two-pho |
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l*********p
发帖数: 197 | 2 voxel=volume pixel.
kind of "3D pixel" |
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l**n
发帖数: 7272 | 3 hehe
Thought about this ~10 years back when I did not own a digital
camera. Then, I learned that it was a dream of many.
Anyway, it is really the ultimate "傻瓜机".
Well, let us put something down here.
1) It is not about pixel any more. It is voxel. How many voxels are
we talk about?
- 5D2, 5616x3744 pixel per frame. Say, we need another 4K along the 3d
axis. It will be 5616x3744x4000 = 84Billion voxels.
- 24 bit true color? If so, you will have 252BB (billion bytes) per
picture.
Well, one |
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h****r
发帖数: 258 | 4 Anyone has an idea about my problem?
Suppose I divided a cube in 3D into a series of voxels (say 100x100x100). In
some of these voxels, I randomly place some particles. The total number of
particles is about 500,000. On center of each of these voxels, I need to
calculate a value which is the function of the distance to the closest
particle. Is there an efficient way to do this?
Now the only approach I could think of is using a Kd-tree. But I think kd-
tree is more suitable for situations when |
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O*******d
发帖数: 20343 | 5 其实focus stack就有这个意思。 可以在最近到最远拍摄128张或256张不同焦点的照片，
后期再把它们合成一张，每张照片只取最清晰的像素。 如果相机可以立即处理，就不需
要同一个拍摄存几百张照片了。 如果真的要存几百张照片，就要研究新的压缩voxel的
技术。 也许可以借鉴video的voxel压缩技术。 HD录像的压缩算法相当牛X，可以把
30帧画面压缩的比一帧未压缩的还小。 |
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w*******y
发帖数: 60932 | 6 The Humble Voxatron
Debut
Pay what you want. Voxatron normally costs $15, but we're letting you set
the price!
Link:
http://www.humblebundle.com/
Voxatron works great on Mac, Windows, and Linux.
Be the first to tackle this voxel-based, old-school-gone-new platform
shooter. Jump into the Voxatron alpha and shoot your way through twenty
challenging areas filled with blocky baddies, destructible toys, and
palliative powerups.
Get Voxatron's future content and gameplay updates. As a customer of the
... 阅读全帖 |
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t*******a
发帖数: 4055 | 7 揭秘 | 替代燃油汽车又是一个世纪骗局？
点击：598 作者： 冯跃威 来源： 能源杂志 发布时间:2017-09-19 13:54:35
1.webp (6).jpg
大量实证信息可以证明，油气资源是可再生资源！而用油气不可再生的由头，就可继续
编出无数离奇的故事来蒙事。燃油汽车替代很可能又是哈伯特骗局的一个延续。
继德国、挪威、荷兰等国之后，法国生态和可持续发展部部长尼古拉·于洛在7月宣布
，法国将在2040年全面禁售燃油车。不仅发达国家，而且，发展中国家的印度也跟风，
寄希望在2030年实现汽车销售全部电动力化。一时间，用电动汽车替代燃油汽车的预期
正在被更多的人所接受，燃油汽车似乎快成了“过街老鼠”。
但是，这种替代只是预期还是骗局？其背后的战略意图是什么？对相关产业未来的布局
又会有什么影响？笔者试图一窥。
制造“石油峰值论”的骗局
本世纪初，“石油峰值论”日渐盛行，驱动着原油供给“末日论”也逐渐时髦，但随美
元购买力的下降，油价上涨，又刺激了开发商增加了原油生产，使原油的“末日”没有
到来，“峰值”更没有到来，然而，到来的却只是随美元实际购买力剧变引起的对包括
原... 阅读全帖 |
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S*********g
发帖数: 24893 | 8 【 以下文字转载自 Stock 讨论区 】
发信人: StephenKing (金博士), 信区: Stock
标 题: 市面上流通1358种电子货币，包括ByteCoin
发信站: BBS 未名空间站 (Fri Dec 15 00:59:47 2017, 美东)
# Name Symbol Market Cap Price Circulating Supply Volume (
24h) % 1h % 24h % 7d
1
Bitcoin BTC $290,617,804,480 $17,358.40 16,742,200 $15,
825,500,000 -0.36% 5.62% 3.15%
2
Ethereum ETH $63,827,563,522 $662.47 96,348,146 $3,723,
910,000 -0.48% -10.50% 52.62%
3
Bitc... 阅读全帖 |
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S*********g
发帖数: 24893 | 9 【 以下文字转载自 Stock 讨论区 】
发信人: StephenKing (金博士), 信区: Stock
标 题: 市面上流通1358种电子货币，包括ByteCoin
发信站: BBS 未名空间站 (Fri Dec 15 00:59:47 2017, 美东)
# Name Symbol Market Cap Price Circulating Supply Volume (
24h) % 1h % 24h % 7d
1
Bitcoin BTC $290,617,804,480 $17,358.40 16,742,200 $15,
825,500,000 -0.36% 5.62% 3.15%
2
Ethereum ETH $63,827,563,522 $662.47 96,348,146 $3,723,
910,000 -0.48% -10.50% 52.62%
3
Bitc... 阅读全帖 |
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S*********g
发帖数: 24893 | 10 # Name Symbol Market Cap Price Circulating Supply Volume (
24h) % 1h % 24h % 7d
1
Bitcoin BTC $290,617,804,480 $17,358.40 16,742,200 $15,
825,500,000 -0.36% 5.62% 3.15%
2
Ethereum ETH $63,827,563,522 $662.47 96,348,146 $3,723,
910,000 -0.48% -10.50% 52.62%
3
Bitcoin Cash BCH $29,779,262,625 $1,766.66 16,856,250 $2
,532,880,000 -1.05% -5.14% 21.33%
4
Ripple ... 阅读全帖 |
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a********m
发帖数: 15480 | 11 sc只是地形高度. 光影至少需要每个像素的高度,而且voxel方案还有不少限制,所以一直
也没流行.
而且3d还有硬件支持,osx就是把桌面的很多东西用3d来实现,还是很成功的. |
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a********m
发帖数: 15480 | 12 duke3d比quake早几个月。
三角洲记得是用voxel渲染，和主流多边形渲染不一样。 |
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k**********g
发帖数: 989 | 13
you forgot volumetric images.
however, volumetric image processing don't "simply" use multidimensional
arrays provided by the language; their algorithms are designed from ground
up to do tiling or voxel indexing. |
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A*u
发帖数: 111 | 14 similar to pixel
micr
Institut
Jish
Se
polymerizatio |
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E********r
发帖数: 99 | 15 is it the same meaning as in computer graphics, volume modeling?
What is two-photon polymerization? |
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l*********p
发帖数: 197 | 16 Use two photon absorption process to polymerize.
Usually the photoinitiator absorbs two photons to split into radicals, those
radicals start the polymerization process. |
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f**d
发帖数: 768 | 17 这是一本计算神经科学的优秀著作，全文拷贝这里（图和公式缺），有兴趣的同学可以
阅读
如需要，我可以分享PDF文件（－－仅供个人学习，无商业用途）
From Computer to Brain
William W. Lytton
From Computer to Brain
Foundations of Computational Neuroscience
Springer
William W. Lytton, M.D.
Associate Professor, State University of New York, Downstato, Brooklyn, NY
Visiting Associate Professor, University of Wisconsin, Madison
Visiting Associate Professor, Polytechnic University, Brooklyn, NY
Staff Neurologist., Kings County Hospital, Brooklyn, NY
In From Computer to Brain: ... 阅读全帖 |
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m***f
发帖数: 1622 | 18 看下面的视频，类似的技术正在进行中，
预计不远，就能在实验和数理技术上找到最佳的处理方法，来重新大脑内影像。
http://www.youtube.com/watch?v=daY7uO0eftA
and
Neuron, Volume 60, Issue 5, 915-929, 10 December 2008
Visual Image Reconstruction from Human Brain Activity using a
Combination of Multiscale Local Image Decoders
Yoichi Miyawaki1, 2, 6, Hajime Uchida2, 3, 6, Okito Yamashita2, Masa-aki
Sato2, Yusuke Morito4, 5, Hiroki C. Tanabe4, 5, Norihiro Sadato4, 5 and
Yukiyasu Kamitani2, 3, ,
Summary
Perceptual experience consists of an enormous number of ... 阅读全帖 |
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l**p
发帖数: 474 | 19 for the volume rendering, it might be difficult to get the depth information.
All non-empty voxel will effect the z-buffer. but it would be interest if you
can find someway to get around it.... make soem information you can direct
index to the interested part of the volume.
existing
mainly
a |
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e****r
发帖数: 166 | 20 yeah, i know what you mean, maybe the traditional z-buffer can't
handle such problem, but if we can us some kinda of 'volume'z-buffer,
say every non-empty voxel will have an index in this 'volume'z-buffer,
maybe we can archieve the goal. of course it's not efficient way, but
it might be good for realtime stuff after the preprocess.
information.
you
highlighting
viewing.
post
Bull |
|
