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How Does a Light Field Camera Work ?

A good picture is like a time capsule.

It lets you capture a moment and enjoy it for many years to come.

Modern features like auto-focus and large image sensors make taking a perfect photo a snap.

After the fact we can use software to make images sharper or get rid of things we don't want in our photo.

But there's still one thing even the best digital cameras can't do: fix a photo that's out of focus.

Remember that blurry mess that was supposed to capture a kid's game-winning catch?

Fortunately, there's a camera that can help even the most photo-challenged of us.

A light-field camera lets you fix the focus of an image even after its been taken.

So how does it work?

The image sensor in a normal digital camera adds up all of the rays of light around whatever you're photographing and counts them as a single amount of light.

It's helpful to use music as an analogy.

Taking a conventional digital photo is like recording all of the instruments in a band all at once.

translation

sentence:
好的照片就像一个时间胶囊。
它可以让你捕捉到一个瞬间,并在未来的许多年里享受它。
自动对焦和大型图像传感器等现代功能使拍出完美照片变得轻而易举。
之后,我们可以使用软件使图像更清晰,或者去掉照片中我们不想要的东西。
但有一件事即使是最好的数码相机也做不到:修复失焦的照片。
还记得那个模糊的混乱吗,它应该是一个孩子的致胜接球?
幸运的是,有一款相机可以帮助我们,即使是最不擅长拍照的人。
光场相机可以让你在拍摄后也能确定图像的焦点。
那么它是如何工作的呢?
普通数码相机中的图像传感器会将你拍摄的物体周围的所有光线相加,并将它们计算为单个光量。
用音乐作类比是有帮助的。
拍一张传统的数码照片就像同时记录下一个乐队的所有乐器。

phrase:
After the fact -> 事后/ (法律)作案后:在犯罪行为发生之后。
was supposed to -> 本来要
light-field -> 光场

word:
capsule
英 [ˈkæpsjuːl]美 [ˈkæps(ə)l]

n. 胶囊;小容器;太空舱,航天舱;蒴果,荚膜
adj. 简短的;压缩的
v. 压缩;简述

sharper
英: ['ʃɑːpə]

v. 磨;诈欺;磨利;磨快;诈欺;磨利;磨快;【乐】(使)提高音调
adj. 锐利的;锋利;尖锐;成锐角的;锋利的;锐利的;尖的;(变化)急剧的
adv. (时间)整;准;急速地;急剧地;(用于表时间的词语后,表示准时)…整;向左╱向右急转;偏高音地

rid ( ridding, rids )
英 [rɪd]美 [rɪd]

v. 使……去掉,使……去除;摆脱,消除
adj. 得到解脱的

blurry
英 [ˈblɜːri]美 [ˈblɜːri]

adj. 模糊不清的

suppose ( supposing, supposed, supposes )
英 [səˈpəʊz]美 [səˈpoʊz]

v. 推断,料想,猜想;假设,假定,设想;预期,需要,以……为条件;相信,认为(某事物是可能的);(婉转表达)我看,要我说,要不;(因处于某种境地或因约定)必须做(be supposed to do sth.);我看(用于生气地表示预料某事属实)

fortunately
英 [ˈfɔːtʃənətli]美 [ˈfɔːrtʃənətli]

adv. 幸运地

challenge ( challenging, challenged, challenges )
英 [ˈtʃælɪndʒ]美 [ˈtʃælɪndʒ]

n. 挑战,难题;挑战书,比赛邀请;质疑,质询;喝停盘查
v. 挑战,向……下战书;质疑,拒绝接受;盘问,查问;考验

analogy [ 复数 analogies ]
英 [əˈnælədʒi]美 [əˈnælədʒi]

n. 类比,比拟;用类比方法,进行比照;同功

conventional
英 [kənˈvenʃən(ə)l]美 [kənˈvenʃən(ə)l]

adj. 依照惯例的,遵循习俗的;老一套的,习惯的;(武器等)常规的,非核的

instruments
英 [ˈɪnstrʊm(ə)nts]美 [ˈɪnstrʊmənts]

n. [仪]仪器(instrument 的复数);[机]工具;乐器
v. 用器械装备;给乐器谱写(instrument 的三单形式)

A light field camera, on the other hand would be like recording individual instruments on separate audio tracks.

That's because a light field camera uses a special sensor to record the color and intensity of light traveling in every direction through every point in space.

Breaking down a song into individual tracks lets you fine tune a sound.

In the same way, breaking down a photo into individual rays of light lets you improve the clarity of a picture even after its been taken.

Lets use a LYTRO light field camera as an example of how this works.

A LYTRO camera has a lens, a light field sensor, and a micro processor.

This set-up isn't too different from a normal digital camera.

What is different about the LYTRO is that its sensor is covered by a matrix of micro lenses.

These provide an enormous amount of information about direction, color and intensity of light.

Then, the LYTRO's micro processor figures out what an image should look like when it's in focus.

In fact, it doesn't even have a focus mechanism.

You just point, and shoot.

translation

sentence:
另一方面,光场摄像机就像在单独的音轨上记录单独的乐器。
这是因为光场相机使用一种特殊的传感器来记录光的颜色和强度,光在每个方向通过空间中的每个点。
把一首歌分解成单独的音轨可以让你对声音进行微调。
同样地,将一张照片分解成单独的光线可以提高照片的清晰度,即使是在拍摄之后。
让我们以LYTRO光场相机为例来说明这是如何工作的。
LYTRO相机有一个镜头、一个光场传感器和一个微处理器。
这种设置与普通数码相机没有太大区别。
LYTRO的不同之处在于它的传感器被微透镜矩阵覆盖。
它们提供了大量关于光的方向、颜色和强度的信息。
然后,LYTRO的微处理器会计算出图像对焦时的样子。
事实上,它甚至没有聚焦机制。
你只要指着,然后拍摄。

phrase:
on the other hand -> 另一方面
break down -> 分解
fine tune -> 微调
enormous amount -> 巨大的数量
figure out -> 理解,解决,算出

word:
separate ( separating, separated, separates )
英 [ˈseprət]美 [ˈseprət]

adj. 单独的,分开的;不同的,不相关的
v. (使)分离;(把……)分成不同部分;隔开,阻隔;(夫妻)分居,(同居情侣)分手;区分,区别;<美>解雇,辞退
n. 可搭配穿着的单件衣服(separates);独立音响设备(separates);(按照颗粒大小、矿物组成等标准的)土壤划分(separates)

intensity [ 复数 intensities ]
英 [ɪnˈtensəti]美 [ɪnˈtensəti]

n. 强烈,剧烈;(光、声音等的)强度

tune ( tuning, tuned, tunes )
英 [tjuːn]美 [tuːn]

n. 曲调,曲子;歌曲,乐段
v. (给乐器)调音,校音;(给收音机、电视等)调谐,调频道;调整,调节(发动机);调整,使适合;<南非,非正式>告诉

lens
英 [lenz]美 [lenz]

n. 透镜,镜片;(相机的)镜头;(眼球的)晶状体;隐形眼镜
v. 给……摄影

matrix [ 复数 matrices或matrixes ]
英 [ˈmeɪtrɪks]美 [ˈmeɪtrɪks]

n. 矩阵;模型;社会环境;(骨头、牙齿和指甲等身体器官的)母体,基质;脉石;矩阵转接电路;线路网,道路网;精细材料;交叉结构

enormous
英 [ɪˈnɔːməs]美 [ɪˈnɔːrməs]

adj. 巨大的,极大的;<古>凶暴的,极恶的

最近更新: 2023/11/28 18:00
Contributors: liujw155@outlook.com
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