w****n
发帖数: 5749 | 1 旅游途中发现D7k sensor上有脏东西了，还挺大的一坨，不敢卸下来看
其实我每次换镜头都把卡口朝下的啊……
回来以后买了个气吹，准备明天吹吹看。
谁能说下用气吹清洁sensor要注意些什么？
要是气吹吹不掉，那amazon上那种sensor swab有用吗？好像是一次性的，不要擦不掉
灰尘反而把滤镜弄坏了。 |
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t******2
发帖数: 2265 | 2 Here it is one of the most unbelievable rumors I ever read. A new source
told us that Leica is currently developing a new fullframe mirrorless system
with electronic viewfinder instead of the rangefinder system used for the
Leica M9. The new Leica cameras could use Sony sensors instead of Kodak
sensors. If the rumor turns out to be true those cameras will be certainly
expensive (there is a huge extra you have to pay for the brand). I hope Sony
will make their own fulllframe mirrorless system usi... 阅读全帖 |
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q*z
发帖数: 13362 | 3 先说结论,我严重怀疑sony的所谓sensor相位对焦点只是个忽悠.其实是一个软件实现的
算法.所谓的对焦点只是对焦算法的采样点.
算法其实就是用统计概率根据焦外模糊的程度,倒推出物体的距离.这个算法显然是镜头
dependent,所以这也可以解释为什么sensor对焦点是不可以选择的.也可以解释为什么只
支持6个镜头,其他要慢慢加上去.而真正的相位对焦是不依赖于镜头的.这种基于统计的
算法,精确度不高.某些场景可能还会得出错误的估计.
如果有一天chipworks拆机发现a99或nex sensor上根本没有硬件的对焦点
大家不用奇怪.
如果猜测属实,那么a99的对焦系统实在是个垃圾呀. |
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s***k
发帖数: 256 | 4 If you integrate the CPU in the sensor, depending on how fast you want to
run the core, it will generate huge noise to the sensor, which poses a huge
impacts on the IQ. It is easy to design the DSP data path. But how to
achieve the IQ, integration, and cost is a big problem. The yields with both
sensor and the digital logic is another big problem, which put a big
question on the cost. If it is easy like you mentioned, I think SONY can do
it better. SONY has dominated this market for a long time.... 阅读全帖 |
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x****y
发帖数: 1853 | 6 你说的所谓宽容度，估计是指动态范围吧。就是sensor从最暗到最亮能记录多少档的光
。这个主要由sensor的每个pixel的大小决定。pixel越大，动态范围越大。可以想象一
下每一个pixel就像一个水桶。桶里装的水就是你的信息。水的高度就是你这个像素的
亮度。当照片被转成jpeg时，照相机把这个水桶倒到一个0-255的量杯里。0是全黑，
255是全白。
所谓"拉回来",其实就是换一个0-255的量杯去量原来那个水桶，使得原来量出来比如说
是2的那个水桶，变成现在量出20.这样做在放大信息的同时，也把噪音给放大了。水桶
大的sensor,存水量远大噪声，所以“拉回来”后噪声不会很明显。
动态范围(or水桶存水量）一般来说全幅>残幅单反>M4/3卡片机>傻瓜机>>手机。
你在手机里拍的照片可以在手机里调亮，但是只能在手机里看。一旦打上大显示器放大
就会有很多噪点。因为在暗处是app在interpolate你没有的信息,并把噪音放大。
全幅或残幅的话的确对曝光的准确度要求低些，因为有足够的信息给后期补救。但是追
求完美的摄影人尽量不会通过后期处理来补救曝光。 |
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m*6
发帖数: 644 | 7 我不是大牛哈，就随便一说。
同时期的sensor, 像素越大越好。像D700， 8.4micron, 比d300 5.42micron好太多了
。同时期的同样sensor, 处理器决定最终表现，比方说df vs D4. 不同时期的sensor,
新的因为技术工艺提高了， 像素小了，但是成像效果反而提高了， 像6d, 6.25
micron, 比5D 8.04micron 小，但是要好一些。 |
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t******k
发帖数: 5617 | 8 http://www.fujirumors.com/x-pro2-will-feature-aps-c-sensor-trus
n December 16th Fuji Manager Mr. Kawahara said in this interview “if user
demand FF, really, I want to hear the reason why.” Well, it seems that the
reasons to put an FF sensor in the X-PRO2 did not convince the company.
In fact, the trusted Japanese source just told me that the X-PRO2 will
feature an APS-C sensor. At the moment, I do not have more details about it.
That’s a good news for all those, who invested in the excellent Fuj... 阅读全帖 |
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t******k
发帖数: 5617 | 9 http://www.canonrumors.com/2014/08/are-these-the-eos-7d-mark-ii
We think we have the specifications for the upcoming Canon EOS 7D Mark II,
we’re trying to authenticate things down to the CR3 level. We have been
incorrect about previous features of the camera. For one, the top plate is
not an “EOS-1 Style”, and the camera does not shoot 12fps. The sensor does
have new technology, but it is not multi-layer, which is what we originally
reported, but got thrown off by patents showing layered sensors... 阅读全帖 |
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y*b
发帖数: 3190 | 10 Nikon large sensor mirrorless camera is a possibility
Few other points from the interview:
4k video is coming to the Nikon DSLR lineup
"You can expect some new DX lenses in the future. We haven’t forgotten
about our DX customers"
Nikon is still "studying the demand" for a D300s replacement
Nikon is also "studying" the possibility of a D3X successor (D4s body with a
high MP sensor
http://nikonrumors.com/2014/09/23/nikon-large-sensor-mirrorless |
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s********e
发帖数: 2783 | 11 A new Sony sensor will be launched in 2015. Maybe the sensor is so good that
Canon cannot keep up and has to buy the Sony sensors just like other
companies often do? |
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y*b
发帖数: 3190 | 14 不是说2014 announce 吗
“What we can expect (it’s not much that leaked so far):
Canon wants to go serious with mirrorless technology (Canon themselves
confirmed it in a recent interview)
The next M-system camera will sport the sensor of the EOS 70D – my take:
though one of the sources stated it will be the 7D2 sensor, I believe Canon
will go for the 70D sensor.
Hence, it will have 20MP and the game changing Dual Pixel CMOS auto-focus.
Canon is trying to miniaturise things as much as it is possible – ... 阅读全帖 |
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y*b
发帖数: 3190 | 15 (FT5) Sensor shift mode is made for tripod shooting only.
" Two trusted sources told me the new Olympus E-M5II 40 megapixel sensor
shift shooting mode works on tripod only. It’s not meant to be used
handheld. Well, this is somewhat obvious but now we know it with 100%
certainty."
http://www.43rumors.com/ft5-sensor-shift-mode-is-made-for-tripo |
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y*b
发帖数: 3190 | 16 (SR4) RX100m4 with FT sensor has about the same wight and size of the
current RX100m3.
http://www.sonyalpharumors.com/sr4-rx100m4-with-ft-sensor-has-a
"If true it really looks like Sony engineers could win a Nobel Prize in
Miniaturization technology :)
A trusted source told me that the RX100m4 with much larger Four Thirds
sensor manages to have the same weight of the RX100m3. And the size is just
a tiny bit larger. The camera will remain perfectly pocketable.
It’s still unconfirmed if the camera... 阅读全帖 |
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y*b
发帖数: 3190 | 17 (SR3) Sony A6xxx/a7xxxx has a new backlit sensor and RGBW pixel array.
"A new source shared some more details about the soon to be announced new
Sony E-mount camera.
1) Sony is preparing the next step in video quality and experience
2) This is an interchangeable lens camera with
– Best in class low light performance (backlit sensor and RGBW pixel array)
– internal 4k video recording with full sensor readout in 60fps
– extremly fast autofocus system" |
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y*b
发帖数: 3190 | 18 "
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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c*****e
发帖数: 757 | 19 高感提高了不少啊，基本和APSC的水平差不多了。看来APSC包括全幅还有很多上升空间。
这个sensor据奥巴说是他们自己设计Sony生产的，还融合了很多十字相位对焦点。
GX8用的是sony设计的sensor吧，好像GH5也是这个sensor，应该是上一代的技术了。
其实我觉得就摄影而言，EM1II的含金量比GH5高不少。GH5融合的那么多视频功能，主
要拼的是数据处理能力。
New- |
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d******d
发帖数: 2210 | 20 没法打倒，做消费类相机 sensor 的没几家。
而且最好的sensor 不卖而已，还得靠大法的次一等 sensor 呢。 |
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y*b
发帖数: 3190 | 21 zz from CR
"We’re told that the Canon EOS 6D Mark II will get a brand new and
dedicated 26mp sensor.
This keeps in line with the original EOS 6D getting its own sensor.
Canon EOS 6D Mark II Known Specifications (We’ll update this list as we get
more information)
26mp Full Frame CMOS Sensor
DIGIC 7
Wi-Fi
Bluetooth
Vari-Angle LCD
A slightly taller and deeper body over the current EOS 6D.
New battery grip BG-E21
Announcement on June 29, 2017, Shipping in early August" |
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s****n
发帖数: 96 | 22 【 以下文字转载自 PDA 讨论区 】
发信人: suoxin (索心), 信区: PDA
标 题: 牛排的light sensor在哪儿？
发信站: BBS 未名空间站 (Sun Apr 1 11:36:54 2012, 美东)
今天给牛排装了个套。装完后整个屏幕变暗了。我想可能是把light sensor给挡住了。
可是找来找去，也没看到哪个是light sensor啊。
谁给指点指点 |
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c******y
发帖数: 49 | 23 我得macbook pro已经过了warranty很久了，现在电池显示是一个叉叉（no battery
available）状态。我用另一台电池放上去是同样的状态。
现在初步确定是battery sensor 的问题， 估计是sensor感应不到我得电池。 不知道
版上有没有人发生过同样的问题？有没有成功换过 battery sensor? |
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N**D
发帖数: 10322 | 24 刚装了一个把光驱槽改造成硬盘槽的东西，有一个thermo sensor没法装，主板上唯一
的一个themo sensor socket 已经被占用了
这个，只有一个thermo sensor 应该没问题吧。
我看已经装好的那个就是在一堆电源线里挂着 |
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a*******g
发帖数: 44 | 25 A Postdoctoral Position supported in the area of gas sensor development is
available in summer 2010. Candidate must have a Ph.D. in chemistry or
related field and strong background in electrochemistry and
electroanalytical chemistry. Applicants who have strong training and
experience in electrochemcial gas sensor development, ionic liquids and
explosvie gas sensor development are strongly encouraged to apply.
Please submit a CV with names of 3 references to Dr. Xiangqun Zeng (www.
oakland.edu/ |
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a*******g
发帖数: 44 | 26 【 以下文字转载自 ChemEng 讨论区 】
发信人: abrahuang (Ab), 信区: ChemEng
标 题: Postdoctoral Position_Gas sensor
发信站: BBS 未名空间站 (Sun Feb 7 22:24:50 2010, 美东)
A Postdoctoral Position supported in the area of gas sensor development is
available in summer 2010. Candidate must have a Ph.D. in chemistry or
related field and strong background in electrochemistry and
electroanalytical chemistry. Applicants who have strong training and
experience in electrochemcial gas sensor development, ionic liquids and
explosvie |
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g*******g
发帖数: 46 | 27 我曾经也是做sensor的，主要是系统应用，不做材料研究
但是申请时没人要，只好换方向了
个人感觉，做sensor实际应用可能更有前途。现在新能源发展很火，是很大市场。这个
领域里面肯定离不开sensor。
愿一起交流这个领域
总感觉老是这样打工下去不是个办法 |
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c******e
发帖数: 56 | 28 Funded PhD Student in Optical Sensors, ECE, UMASS, Lowell, USA
Position: PhD Student in Optical Sensors
Organization: Electrical & Computer Engineering Department, UMASS- Lowell
Location: Lowell, USA
Description:
Dr. Xingwei Wang is seeking a highly motivated PhD student in optical fiber
sensors.
Our center features:
Good facilities: setups for optical engineering are available.
Close cooperation: We can access a lot of equipments, such as
clean room, SEM, AFM, e |
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p******1
发帖数: 244 | 29 小弟今年申请PhD, 对方向有些迷茫
wireless sensor network (body sensor network,ITS sensor network),主要做protocol design
和
computer vision (image modeling, image category, 用到MRF,EM等）
都比较喜欢，个人偏向computer vision
传感网络方向我可以去比较好的学校,而且我工作1年多都在做这个。但据前辈们说好像这个方向没什么前途。。。
望高人指点，衷心谢谢！ |
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w****y
发帖数: 2952 | 30 You have a system of N mobile sensors each transmitting GPS location,
estimated direction to a target and target intensity (counts). The
direction and intensity estimates are noisy.
Question 1: Given some history of sensor readings, what's the best approach
to estimate the true target location and intensity?
Question 2: With this new estimate, what the best approach to re-direct the
N sensors to confirm the location?
非常感谢 |
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c*******b
发帖数: 33 | 31 Dear Prospective Students,
I am an Assistant Professor in the Department of Computer Science at Wayne
State University (a Research-I university, the highest rating issued by the
Carnegie Foundation), USA. I am looking for talented students to join my
research program, and I am writing to announce the Ph.D. positions that will
become available in my research group in fall 2011 or fall 2012.
Our research explores new theories, methods, and systems building-blocks for
addressing dynamics and uncert... 阅读全帖 |
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w*h
发帖数: 286 | 32 各位EE大侠，本人ME对SENSOR一无所知。最近家里的GARAGE DOOR OPENER出现了问题，
当门要接触到底部的时候，突然又自动回来了（打开门），这样门是关不上了，只能手
动将门关上。这个GARAGE DOOR OPENER在门底部有两个SENSORS，一个现在LED灯是绿色
的，另外一个LED是黄色的。本人初步估计是SENSORS可能将下来的门错误当成是障碍物
（如小孩，或车顶之类的东西），就突然自动回来了。
头一回遇上这类问题，还望有经验的大侠们指正，如何修复。
先谢了！ |
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m******i
发帖数: 834 | 33 新的纳米传感器可以检测哮喘症状,New Nano-Sensor Can Detect Asthma Symptoms
【纳米科技世界快讯】据皮茨堡大学报道，A sensor developed at the University
of Pittsburgh could strip the element of surprise from some asthma attacks
by detecting one before its onset. Fitted in a hand-held device, the tiny
sensor provides people who have asthma with a simple and affordable means of
keeping tabs on their condition by measuring their breath for high levels
of a specific gas associated with asthma inflammation.
Researchers led by Alexander S |
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B*********0
发帖数: 140 | 34 IEEE sensors Journal 1.61
Sensors and Actuators B-3.12
Sensors and Actuators A-1.72 |
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y***e
发帖数: 6082 | 35 第一个杂志还要交钱。。。。
IEEE sensors Journal 1.61
Sensors and Actuators B-3.12
Sensors and Actuators A-1.72 |
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c*******b
发帖数: 33 | 36 Dear Prospective Students,
I am an Assistant Professor in the Department of Computer Science at Wayne
State University (a Research-I university, the highest rating issued by the
Carnegie Foundation), USA. I am looking for talented students to join my
research program, and I am writing to announce the Ph.D. positions that will
become available in my research group in fall 2011 or fall 2012.
Our research explores new theories, methods, and systems building-blocks for
addressing dynamics and uncert... 阅读全帖 |
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f********m
发帖数: 8397 | 37 【 以下文字转载自 Automobile 讨论区 】
发信人: mifepristone (弃婴), 信区: Automobile
标 题: 关于knock sensor,给一些外行扫扫盲
发信站: BBS 未名空间站 (Sun Nov 5 17:52:57 2006)
knock sensor结构很简单,里面是一块圆环形黑色压电陶瓷,
两根线接出来,中间是一个固定用的铁套筒,螺栓拧在上面.
由于中间是铁套筒,所以压电陶瓷上都包有塑料绝缘薄膜,
以免短路.
这样的设计,用什么汽油都是震不碎的,即使你拆下来用榔头
敲,也很难敲碎.
knock sensor出问题主要是高温导致外面塑料壳开裂,造成
里面绝缘膜老化损坏短路. |
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n*********o
发帖数: 315 | 38 Sorry, I can only type English in office.
My explanation below doesn't apply to every vehicle. Just for your reference.
Typically, a Throttle Position Sensor (TPS) is potentiometer with at least
2K ohms resistance. One side of TPS is connected to a pin out of ECM,
normally called sensor supply. Sensor supply pin provides regualted 5V DC
power. Another side of TPS is connected to chassis ground, normally labled
as GND. The wiper of TPS is connected to one of ECM's analogy input. As the
wiper move |
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x*x
发帖数: 2001 | 39 我的E39 5s， 以前，诸多毛病同时并发
1. ABS没了，Traction Control没了
2. 速度表不动了，油耗表不动了，还有，里程表也不走了。
3. 以前车开起来，车门自动锁上，现在，不锁了。
。。。
因为是没有了车速信号，
因为某一个wheel speed sensor坏了，
虽然，四个轮子各有一个独立的这个sensor，(ABS/TC必须得如此)。
后来，换了那个sensor，就全部好了 |
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T**J
发帖数: 3340 | 40 这个实在是粗暴的离谱,上次输出坏了的时候虽然也粗暴,但还能接受,这个是我直接不敢
再开下去了,直接回家,好在刚出门也就3迈.
parts dealer list价$38.75，online的估计也就$25左右，不过这东西等不及，还是lo
cal买了，刚好上次的那个是9个月前坏的，直接拿发票/坏的sensor去dealer换了个新的
。发现问题，10min开回家，5min check一下code，确定是sensor，然后花3min call d
ealer，丫说俺必须拿坏的去换好的，只好call朋友送我去dealer，5min把sensor拆下来
，15min开到dealer，结果dealer手头的货架上没有，足足等了半小时才从仓库把新的送
来；回家5min装好了事。
就算是$40换了2个把，再加俺自己的labor。 |
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s*****8
发帖数: 606 | 41 影响lean的因素多了去了，sensor坏只是可能性之一。
聪明的话拔出spark plug，它头部的颜色和形状可以给你超多发动机运行的信息，自己
google“read spark plug”如果能读出lean的话，那你o2 sensor应该是没有问题的。
不管你的mass air flow/pressure, 有专门清理他们的东西！
BTW：bank1 O2 sensor装完新的后，reset ECU， checking engine肯定是不亮的，要
行使20mile左右后有问题才会重新pop up |
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w*******y
发帖数: 60932 | 42 $5 cheaper than the BF deal.
Link:
http://www.tigerdirect.com/applications/searchtools/item-Details.asp?EdpNo=4944486&sku=L23-0109
Enter code: SF011470 at checkout to drop the price.
Detailed Features
Key Features
Includes Logitech Vid
Now video calling is free, fast, and easy for you and anyone you want to
talk to. Its built into your webcam setup, so you can call right away. Find
out more about Vid now.
2-megapixel sensor
With its true 2-megapixel sensor, and up to 8-megapixel photos (software... 阅读全帖 |
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w*******y
发帖数: 60932 | 44 Newegg has the Titan Dummy Security Dome Camera With Flashing Red Light &
Proximity Sensor for only $2.99 shipped.
Lowest price on this item. Usually sells for $9.
Link to security dome:
http://www.newegg.com/Product/Product.aspx?Item=9SIA0MC05M7581&
Features:
Criminals like to pick easy targets and without a surveillance system, you'
re putting your home and property at risk. A realistic Dummy Security Camera
gives all the appearances of the real thing. Made from a real disabled
security camera... 阅读全帖 |
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w*******y
发帖数: 60932 | 46 Smoking hot deal in you need this - Xbox 360 Kinect Sensor Holiday Bundle
2011 (includes Gunstringer, Kinect Adventures, and Download Code for Fruit
Ninja being sold on ebay for $99 shipped (tax in a couple states)
What's in the Box
Kinect Sensor
The Gunstringer Downloadable Token
Fruit Ninja Kinect Downloadable Token
Kinect Adventures Game
Power supply cable
Manual
Wireless Netwok Adapter
Easily hook up with friends with Video Kinect, no headset required
Sign into your profile by just stepping ... 阅读全帖 |
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s***c
发帖数: 1926 | 47 一大把sensor随机一洒，就能在一定时间内实时监控战场。
几年前实验室的哥们还写了N多论文，sensor之间如何通讯等等。不知道成熟没有，正好
用在这次抓捕中啊。 |
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