e**n
发帖数: 5876 | 1 jpg要好得多, 如果用raw的话, 除了watercolor effect外, 还有red color bleeding
effect, zipper-style effect等等.
有人总结的:
right now your choices are as follows:
in-camera jpegs - decent detail, some colour halos (especially reds),
excellent overall color
silkypix - good detail, good color detail, pretty poor overall color though.
And the interface is not very standard. Can be improved with creating
custom camera profiles (colorchecker SG+profilemaker, etc)
Adobe Camera Raw / Lightroom - pretty good overall color, so-... 阅读全帖 |
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T****i
发帖数: 15191 | 2 我来说说为什么。
1）全幅肯定不适合。2）手机拍风景是找虐，不能用滤镜，会严重影响画面的审美情趣
。当然Sony新出的手机镜头没准可以用滤镜，可是也和傻瓜相机差不多了，而且还不如
小DC用着方便。3）小DC勉强适合，可是那种super zoom一类的也不比m43轻多少，倒是
画质差了许多。4）残幅单反，低端的比较轻的适合，但单反好镜头可不轻，毕竟底在
那，镜头小不了。5）Sigma DP系列，适合做备机，因为只有三个定焦选择，既不够广
，也不够长，crop不能解决景深的需求。还有个问题就是某些逆光条件产生artifact，
难以后期去掉，拍日落日出可能有很大问题。这个缺点我深有体会。6）m43肯定画质比
全幅差，但不比残幅差多少，这个早有测评结论。用的不好，D800一样拍出颜色发黄还
不如小DC的效果。而m43的优势是系统优势，只有长期用的才知道。它是个各方面都可
以接受的选择，一个compromise，正好适合旅游，不太严肃的风光一类的。而且O家的
机器和镜头结合非常圆润。我用过老尼的神机，拧镜头感觉很涩。圆润的结合加上镜头
很小，使得可以单手换镜头。早期的m43是不大好，有人用过又... 阅读全帖 |
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b******g
发帖数: 3616 | 3 用任何HDR软件过头了都会有各种artifacts，比如halo，这个和photomatix本身没关系。 |
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b******g
发帖数: 3616 | 4 我的理解，clarity的效果类似大radius/小amount的unmask/smart sharpen。效果是增
强轮廓锐度而并非细节锐度。
Clarity之所以稍微拉大一点就会产生halo，原因就像我文章中说的，当sharpen的
radius比较大的时候，只要amount稍微大一点，马上就出现各种artifacts. |
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e**n
发帖数: 5876 | 5 你觉得过了是因为这是200%放大图, 所以好像有artifact, 你随便把一张照片放大200%
, 看看是不是像post/sharpening過.
而且上面link里有100%的 |
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g****k
发帖数: 417 | 6 这是想当然
高速快门在拍视频的时候会产生很多artifact
拍摄都建议在fps的两倍左右 |
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b******g
发帖数: 3616 | 7 因为锐化根本没法定量。没法总结一个放之四海而皆准的rule，比如多少半径多少强度
多少阈值。锐化的设置取决于很多因素，客观因素比如照片尺寸到底多大、照片到底细
节多少；主观因素比如你到底要这张照片有多锐。
举个例子，同一张照片的4000X6000 px版本和200X300 px缩小版本，要在100%视图下看
起来同样锐，是需要截然不同的半径设置。而同样尺寸的一张蓝天白云照和一张草坪照
，需要的锐度设置也是不一样的。对于一张纹理照，往往细节锐化多才显得好看；而对
一张迷雾照，往往不需要锐化，保留柔的感觉才更真实。
大概能放之四海而皆准的原则只有，当一张照片被锐化得出现过多明显的artifacts时
（halo，明显的噪点等），意味着锐化过头了。 |
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T****i
发帖数: 15191 | 8 很多时候，hard edge如山，树干和建筑的边缘，如果背景是天空或者浅色调，仔细看
能看到一条很浅的线，勾画了轮廓，很假。
这个缺点是不是在其他Bayersian sensor的相机也存在就不太清楚了，我怀疑都有。反
正我在Sigma上没看到过。Sigma有时有另一个问题，就是逆光云的边缘会有artifact。 |
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y*b
发帖数: 3190 | 9 "
We saw this before from Sony and now there is a new patent from Nikon that
seems to describe the very same thing: A curved image sensor! The advantages
of such a sensor would be:
You can design more compact lenses
The Sony patent said there is a 1 stop advantage in making such lens designs
No artifacts or image quality deterioration on corners
My guess is that if that patent will ever be implemented ina real products
this will happen on a fixed lens camera.
"
http://www.mirrorlessrumors.com/al... 阅读全帖 |
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b******g
发帖数: 3616 | 10 color banding是8 bit一个很大的问题。
这也就是为什么最新的luminosity mask也从8 bit升级到了16 bit。不然mask本身如果
就带banding，调整出来的效果也容易有artifact了。 |
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n*****1
发帖数: 1329 | 11 价位比，才合理。另外，d3300:
The Nikon D3300 has some of the best low light and best picture quality of
mid level DSLR cameras, in the APS-C sensor size (this is not a full size
sensor, but to get a full size sensor you will need to spend about $2000 or
$3000 more).
Nikon D3300 is rated 30% higher in image quality compared to the Canon 70D.
The Nikon D3300 has a slightly larger sensor than the Canon 70D.
I was torn between Canon and Nikon. If you look at all the complaints about
Canon in the last 1 or 2 ye... 阅读全帖 |
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l**********r
发帖数: 1125 | 12 区别很大啊，手机上面都很明显，索尼细节好很多。
你要是调一下Raw，你就发现佳能暗部的红绿噪点，Banding都出来了。
个人感觉，5D2直出JPG是我有过玩过的相机里最好的，尤其是人像，配上Zeiss的一些
经典头，直出就非常惊艳，基本都舍不得再调。
但是它的Raw比起A7一代都要差不少。索尼的Raw简单后期一下，色彩可以完全达到或者
超过佳能的水准，毕竟技术指标在那里。 索尼的FE新镜头贵一点，但是我觉得大部分
要好于至少不逊于对等的佳能头。你要是不转接用原厂，清晰度（尤其是边缘部分）还
要有提高。A7R2的非压缩Raw基本上没有什么缺陷，在处理明暗对比强烈的地方都有很
好的分辨率，锐化的Artifact也很少，高ISO噪点看上去也自然，基本上是加深的原背
景色或者灰调，没有什么伪色。 |
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h******c
发帖数: 2111 | 14 据说进步很大 应该还不完美
: 边缘artifact有没有改进？
|
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z*****x
发帖数: 156 | 15 我明天要做”EU-China,historical background"的演讲，只有差不多20分钟的时间，
而我的稿子太长，各位好心人能不能帮我精简一下啊？感激不尽啊~~~我因为是新人只
有20个包子，大家别嫌少啊~
Capital 1:The earliest Trade/ Communication between China and Europe
European-looking mummies found in China----The Taklamakan Mummies
In the late 1980's, perfectly preserved 3000-year-old mummies began
appearing in a remote Taklamakan desert. They had long reddish-blond hair,
European features and didn't appear to be the ancestors of modern-day
Chinese people. Archaeologists (ar.kie.ol.... 阅读全帖 |
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p*********w
发帖数: 23432 | 16 彭博社：中贡国建孔子学院前提是无敏感词zz
http://www.bloomberg.com/news/2011-11-01/china-says-no-talking-
When a Beijing organization with close ties to China’s government offered
Stanford University $4 million to host a Confucius Institute on Chinese
language and culture and endow a professorship, it attached one caveat: The
professor couldn’t discuss delicate issues like Tibet.
“They said they didn’t want to be embarrassed,” said Richard Saller, dean
of Stanford’s school of humanities and sciences. Stanford refus... 阅读全帖 |
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D*******l
发帖数: 5462 | 17 1600字的东西，偷了900，还狡辩用段落来说相同率。
http://www.legaldaily.com.cn/index/content/2011-03/30/content_2
"我认为那是抄袭"
---《科学是什么》抄袭疑案调查
《科学是什么》全文约一千六百字，其中约有九百字几乎原文引自罗伯特教授的《
神创论是科学的理论吗》一文，构成了《科学是什么》的主要观点，但并未注明这些观
点的出处
法治周末记者 李秀卿
“是的，我认为那是抄袭(Yes，Iconsideritpla-giarism.)。”2010年10月17日，
美国密歇根州立大学生理学教授罗伯特·鲁特-伯恩斯坦(RobertRoot-Bernstein)在给
网友“圆排骨”的信中，确认了方舟子《科学是什么》一文抄袭了他已经发表的文章。
此前，在美国工作的华人网友“圆排骨”向罗伯特教授举报，曾在该校读书的中国
学生方是民(方舟子本名)涉嫌抄袭他的文章。
从上世纪70年代开始，罗伯特教授在普林斯顿大学先后做生物化学和科学历史研究
，1987年至今在密歇根州立大学任生理学教授。他忠诚地信仰达尔文的进化论，并作为
进化论阵营中的... 阅读全帖 |
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M****u
发帖数: 4504 | 18 【编者按】：在中国，方舟子是一个知名度极高的公众人物，他被冠以"打假英雄"、"
打假斗士"，他在新浪的微博"粉丝"高达57万之众，具有强大的影响力。任何一个不带
偏见的人都承认，他对学术打假作出过贡献。与此同时，对方舟子本人涉嫌抄袭的指责
一天也没有停止，但他始终不承认自己存在任何形式的学术不端行为，并时常为此与学
界人士爆发激烈论战，这使得他的形象颇受争议。本着公正客观的立场，本报将陆续披
露对方舟子涉嫌学术不端行为的调查。
"打假斗士"的另类记录
“他反差很大，双重标准明显———看别人的毛病很清楚，自己的缺陷不觉察。他
有洁癖，又不是一个完美的人，活得也不轻松。”中国社科院学者易华对方舟子这样评
价说。
正是在这种正反两方的严重争议中，方舟子不时出现在公众视野。而他的每一次出
场，都是舆论关注的焦点。
流水的朋友
北京大学哲学系教授刘华杰是最早欢迎方舟子加入国内科普圈子的人之一。1999年
，刘华杰在网上采访了方舟子，文章发表在《科学时报》上。他还为方舟子策划并编辑
了2000年出版的《方舟在线》一书。
这本国内第一本多学科网上争鸣文集的出版，因为“立场鲜明，立战性强”，使生
物化... 阅读全帖 |
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b*s
发帖数: 82482 | 19 可能是transcoding artifacts……
内什么，你内个片头做的是３Ｄｄ吗？得戴３D眼镜看？ |
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b*s
发帖数: 82482 | 20 所以叫做transcoding artifacts啊……
在我这里还好好的，到你那里转一圈出来就幻影了。。。 |
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b*s
发帖数: 82482 | 21 W. Michel, Research Notes (6. Dec 2005)
On Engelbert Kaempfer's "Ginkgo"
Many authors have discussed the question why Engelbert Kaempfer (1651-1716)
presented the name of the ginky -tree in such an awkward spelling in the
Amoenitates Exoticae. Other misspellings in his book do not draw much
attention, but this one was introduced into botanic nomenclature by the
eminent Carl von Linné (1707-1778) and therefore GINKGO BILOBA will be with
us as long as botany exists. Like many others I have always... 阅读全帖 |
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W****r
发帖数: 835 | 25 应该是ps调对比度过头了出来的artifact |
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f*****n
发帖数: 12752 | 26 佛经只是开善门结善缘的，象神通之类的噱头，佛法可不是光读经就能通的。佛法教人
思索，基教教人盲从。就算圣经真是天神下凡写的，也只能当relic，artifact不能当
knowledge，enlightment，与凡人无益。 |
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H********g
发帖数: 43926 | 27 差得远。我们能买得起的，最高分辩率也就0.1mm左右，而且有各种artifact。实际上
3d打印就相当于我们人类拿着一管牙膏挤呀挤，挤出各种形状，最后的产品上可以很清
楚地看到牙膏一条条的样子。另一个比方是通过拉屎的方法修一座宝塔：说是宝塔，其
实更像海螺。 |
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s******y
发帖数: 28562 | 28 这个是成像的artifact还是真的？为什么是六角型？ |
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d**********i
发帖数: 524 | 29 【 以下文字转载自 Military 讨论区 】
发信人: dayuguanshui (大禹灌水), 信区: Military
标 题: 基因认为我是自由派 不是保守派
发信站: BBS 未名空间站 (Sat Feb 3 09:53:44 2018, 美东)
We did find a significant association between political conservatism and
rs10952668 (Table 5). This SNP lies in LOC642355, a pseudogene on chromosome
7. Not surprisingly, the SNP also showed an association with the highly
correlated trait of Democrat versus Republican (b=0.260, P<
.02).
An interesting finding was that the SNP associated with political
cons... 阅读全帖 |
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c******n
发帖数: 5697 | 30 It's no secret that hundreds of millions of people around the world now
routinely use the Internet to indulge their sexual curiosity. Today you
can ogle more naked bodies in a single minute online than the most
promiscuous Victorian could have seen in a lifetime. Because this online
activity leaves behind a trail of digital crumbs, for the first time we
can gather reliable data on the erotic interests of a broad swath of
humanity.
My colleague Sai Gaddam and I have analyzed a billion of these we... 阅读全帖 |
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c**i
发帖数: 6973 | 31 【 以下文字转载自 History 讨论区 】
发信人: choi (choi), 信区: History
标 题: Mummies from Xinjiang
发信站: BBS 未名空间站 (Tue Mar 30 21:47:55 2010, 美东)
(1) Scarlet Cheng, Silk Road treasures; Mummies and other artifacts found
along the fabled route in China are the stars of a new exhibition at the
Bowers Museum in Santa Ana. Los Angeles Times, Mar. 28, 2010.
http://www.latimes.com/entertainment/news/la-ca-silk-2010mar28,0,7408004.story
Note:
(a) Bowers Museum
http://www.bowers.org/
("Founded in 1936 by the City of Sant |
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a***y
发帖数: 19743 | 33 for example
他的葵花子作品。
您可以参考专业人士的描写。下面这段文字描述艾未未本人对葵花籽作品的解释。到目
前为止我没有在Mitbbs上其他版面上见到有任何人试图去解析此作品的含义。
Ai Weiwei
TATE MODERN
Bankside
October 12–May 2
Ai Weiwei, Sunflower Seeds, 2010, porcelain, dimensions variable.
Installation view.
“Why?” a girl asked petulantly at Tate Modern, when she was prevented from
walking across Ai Weiwei’s vast offering of tiny things: Sunflower Seeds,
2010, an installation comprising one hundred million handcrafted porcelain
sunflower-seed husks carpeting the Turbine Ha... 阅读全帖 |
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g***y
发帖数: 16371 | 34 ☆─────────────────────────────────────☆
aaaty (阿fan提) 于 (Wed Apr 6 17:23:58 2011, 美东) 提到:
因为这里不是政治区，所以我们讨论他可以从他的艺术成就为立足点。
我只想谈谈我对艾未未频繁使用“草泥马”，甚至“草泥马祖国”视频这种艺术形式的
理解。因为这个形式很多人不能理解，或者我认为有误解。艺术本来是需要解析的，确
实是不能指望任何一个人看到都能够直接理解艺术作品的含义。
所以，我认为艾未未一系列的“草泥马”相关作品，是符合他尽量年决定采用网络形式
进行活动的风格的。这一点，艾未未在寄给TED的视频里就有解释。http://www.youtube.com/watch?v=MVnH8ou3Kd4
援引Wikipedia对草泥马的解释：
草泥马，是普通話髒話“肏你媽／操你媽”的諧音，被《纽约时报》等媒体认为是中国
网民对于中共网络审查制度不滿的喧洩[1]。具体的起源尚不明确，但在80年代初民间
流行的一则笑话中已经出现。包括「草泥马」在内的詞彙被中国网民列入其惡搞「十大
神兽」之內，「草泥马」... 阅读全帖 |
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l*****a
发帖数: 38403 | 35 http://en.wikipedia.org/wiki/List_of_artifacts_significant_to_t
10-line ritual cup (c. 1 AD) - 2,000-year-old limestone cup with 10 lines of
Aramaic or Hebrew script found near the Zion Gate of the Old City of
Jerusalem. Found by U.S. archaeologists; Shimon Gibson of the University of
North Carolina at Charlotte stated that "To have 10 lines of text is
unprecedented..." They know it contains the Hebrew word for God indicating
it was probably important to the priests who used it in rituals.[3]
Am... 阅读全帖 |
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u****e
发帖数: 118 | 36 A reconstructed hut at the ancient Chinese settlement of Hemdu may resemble
the elevated structures used by the first known rice farmers some 7,700
years ago, scientists say.
A new study of artifacts and sediments found at Kuahuqiao, China, show that
Stone Age farmers there used fire and even flood control to develop the
earliest rice paddies ever found.
Photograph courtesy Y.Q. Zong
http://news.nationalgeographic.com/news/bigphotos/81359870.html |
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c****t
发帖数: 19049 | 37 AN ORISON OF SONMI~451
On behalf of my ministry, thank you for agreeing to this final interview.
Please remember, this
isn’t an interrogation, or a trial. Your version of the truth is the only
one that matters.
TRUTH IS SINGULAR. ITS “VERSIONS” ARE MISTRUTHS.
… Good. Ordinarily, I begin by asking prisoners to recall their earliest
memories to provide a
context for corpocratic historians of the future. Fabricants have no
earliest memories,
Archivist. One twenty-four-hour cycle in Papa Song’s is i... 阅读全帖 |
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n**4
发帖数: 719 | 38 摘要
The Infrared Search for Extraterrestrial Civilizations with Large
Energy Supplies. III. The Reddest Extended Sources in WISE
Astrophysics > Astrophysics of Galaxies
(Submitted on 14 Apr 2015 (v1), last revised 15 Apr 2015 (this version, v2))
Nearby Type III (galaxy-spanning) Kardashev supercivilizations would have
high mid-infrared (MIR) luminosities. We have used the Wide-field Infrared
Survey Explorer (WISE) to survey ~1×105 galaxies for extreme MIR emission,
103 times more galaxies th... 阅读全帖 |
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l*****a
发帖数: 38403 | 39 Theophilus of Alexandria (died 412) was Patriarch of Alexandria, Egypt
from 385 to 412. He is regarded as a saint by the Coptic Orthodox
Church.
He was a Coptic Pope at a time of conflict between the newly dominant
Christians and the pagan establishment in Alexandria, each supported by
a segment of the Alexandrian populace.
In 391, Theophilus (according to Rufinus and Sozomen) discovered a
hidden pagan temple. He and his followers mockingly displayed the pagan
artifacts to the public which offen... 阅读全帖 |
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s*********a
发帖数: 801 | 40 US study finds Neanderthals ate their veggies
A US study on Monday found that Neanderthals, prehistoric cousins of humans,
ate grains and vegetables as well as meat, cooking them over fire in the
same way homo sapiens did.
The new research published in the Proceedings of the National Academy of
Sciences (PNAS) challenges a prevailing theory that Neanderthals' over
reliance on meat contributed to their extinction around 30,000 years ago.
Researchers found grains from numerous plants, including a ... 阅读全帖 |
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l*****a
发帖数: 38403 | 41
耶稣复活 铁证如山---耶稣裹尸布真伪辨 周培义（Joel），跨文化交际学副教授
编者按：都灵裹尸布的研究已成为一门博大精深的学问，有关的论文、著作可谓汗牛充
栋，但几乎全
是英文写成。不经翻译，汉语圈的读者无缘知晓其中的内容，只知道“裹尸布是假的”
这一20多年前的
老黄历，却不知现今的科学证据早已否定此论断。为此，笔者特意编辑、整理其中一些
精华加以论
述，但遗漏恐怕在所难免，敬请见谅。
远在1988年，当都灵耶稣裹尸布的一小块边角被欧美的三所大学机构初次检测就宣告为
13世纪的物
品时，科学主义者、无神论者和敌基督教者的阵营里无不一阵欢欣鼓舞。当天的纽约时
报就以大号标
题登出：“碳14检测显示都灵耶稣裹尸布是伪造的”。 “我们已经证明裹尸布是赝品
，那些持反对意
见者如同认定地球是扁平的一群科盲一样无知倒识”，一位参加鉴定的牛津大学科学家
在英国公共电视
台上如是说。他们如此兴奋仿佛如当年的法利赛人高喊“除掉这个人！钉死他！”一样
。仅就这一次裹
尸布的初检结果来看，似乎耶稣又一次被他们羞辱地“铁板钉钉”，钉死在那块略显稻
草黄的亚麻布上
了。
证伪派如此喧... 阅读全帖 |
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l*****a
发帖数: 38403 | 42 (April 29) -- It took nearly 5,000 years to unearth Noah's Ark -- and just
three days for a serious challenge to the legitimacy of the find to emerge.
A former member of the expedition whose sponsors this week claimed to have
found the legendary biblical boat buried beneath the snows of Turkey's Mount
Ararat says the "discovery" was probably a hoax.
"If the world wants to think this is a wonderful discovery, that's fine,"
Randall Price, an archaeologist who in 2008 was working with the Chinese-l... 阅读全帖 |
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l*****a
发帖数: 38403 | 43 【 以下文字转载自 Belief 讨论区 】
发信人: leonana (leonany), 信区: Belief
标 题: Re: list of 和圣经有关的古物
发信站: BBS 未名空间站 (Mon Aug 22 21:21:07 2011, 美东)
http://en.wikipedia.org/wiki/List_of_artifacts_significant_to_t
10-line ritual cup (c. 1 AD) - 2,000-year-old limestone cup with 10 lines of
Aramaic or Hebrew script found near the Zion Gate of the Old City of
Jerusalem. Found by U.S. archaeologists; Shimon Gibson of the University of
North Carolina at Charlotte stated that "To have 10 lines of text is
unprecedented.... 阅读全帖 |
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q********g
发帖数: 10694 | 44 Atheist Roald Hoffmann and MIT Christian agree on the sublime in science
Cornell's Roald Hoffman leads a discussion on nature, knowledge and faith in
the Veritas Forum in Statler Auditorium March 30.
An overflow audience in Statler Auditorium listens as scholars participate
in the forum.
Ian Hutchinson, a Christian MIT nuclear scientist, discusses religion and
science.
In a conversation about science, God and knowledge, a nuclear scientist who
is a devout Christian and a Nobel Prize-winning chem... 阅读全帖 |
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s*********a
发帖数: 801 | 45 http://news.discovery.com/history/god-wife-yahweh-asherah-11031
God's Wife Edited Out of the Bible -- Almost
God's wife, Asherah, was a powerful fertility goddess, according to a
theologian.
THE GIST
God, also known as Yahweh, had a wife named Asherah, according to a British
theologian.
Amulets, figurines, inscriptions and ancient texts, including the Bible,
reveal Asherah's once prominent standing.
God had a wife, Asherah, whom the Book of Kings suggests was worshiped
alongside Yahweh in his te... 阅读全帖 |
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j*******7
发帖数: 6300 | 46 ......
In the last chapter we saw that the Hebrew and Greek manuscripts in our
possession today allow us to have an accurate translation of the Bible.
Therefore, even by Mormon standards, we can be confident that we have the
Word of God. We also saw that secular history has attested to the accuracy
of the Bible so that we can know with certainty that many of the events
recorded in it took place. Unfortunately, the Mormon cannot have this same
confidence when it comes to the Book of Mormon. Archa... 阅读全帖 |
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S**U
发帖数: 7025 | 48 You are ignorant of Buddhist archaeology. The bones of Buddha and his chief
disciples have been found. King Asoka, 100 years after the Buddha, has left
many Buddhist artifacts and they have been discovered. The ruins of 8 major
places for Buddhist sutras are tourist attractions in India. Visit them and
see for yourself.
Also keep in mind that India doesn't think of history as Jews do. A strong
tradition of history keep Jews as a distinct identity even though they are
so few are frequently prosec... 阅读全帖 |
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S**U
发帖数: 7025 | 49 M theory solves some problem of string theory, but not all. It is good that both theories are math.-sound and beautiful; that's an attraction by itself. An untestable theory, however, will not be satisfactory as a physical theory of reality for many. If we can't test the existence of "strings", we are not certain if it is real, or just an artifact, a construct, of our math model. An alternative is to give up the notion that physical reality should be "out there" and testable, and instead treat o... 阅读全帖 |
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J******s
发帖数: 7538 | 50 Even we can show the existence of strings, the theory is right at present,
not forever. This is quite clear in the following statement.
Stephen Hawking
originally believed that M-theory may be the ultimate theory but later
suggested that the search for understanding of mathematics and physics will
never be complete
that both
theories are math.-sound and beautiful; that's an attraction by itself. An
untestable theory, however, will not be satisfactory as a physical theory of
reality for many. If... 阅读全帖 |
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