在"英语"词典里defocus}的意思

在英语中DEFOCUS的发音

defocus  [diːˈfəʊkəs]

DEFOCUS在英语中的意思是什么？

散焦像差

Defocus aberration

在光学中，散焦是图像简单地失焦的像差。 任何使用相机，摄像机，显微镜，望远镜或双筒望远镜的人都很熟悉这种差异。 在光学上，散焦是指沿着光轴离开最佳焦点的平面或表面的平移。 一般来说，散焦会降低图像的清晰度和对比度。 什么应该是锋利的，高对比度的边缘在场景中逐渐过渡。 场景中的细节很模糊，甚至变得隐形。 几乎所有的图像形成光学装置都融合了某种形式的焦点调整，以减少散焦和最大化图像质量。 对于给定的聚焦偏移量，图像模糊程度与镜头f数量成反比。 低f值，如f / 1.4至f / 2.8，对散焦非常敏感，并且具有非常浅的焦点深度。 在f / 16至f / 32范围内的高f数高度耐散焦，因此具有较大的焦点深度。 f值中的限制情况是针孔摄像机，可能在f / 100到f / 1000的范围内工作，在这种情况下，所有物体几乎不受距离针孔的影响。

In optics, defocus is the aberration in which an image is simply out of focus. This aberration is familiar to anyone who has used a camera, videocamera, microscope, telescope, or binoculars. Optically, defocus refers to a translation along the optical axis away from the plane or surface of best focus. In general, defocus reduces the sharpness and contrast of the image. What should be sharp, high-contrast edges in a scene become gradual transitions. Fine detail in the scene is blurred or even becomes invisible. Nearly all image-forming optical devices incorporate some form of focus adjustment to minimize defocus and maximize image quality. The degree of image blurring for a given amount of focus shift depends inversely on the lens f-number. Low f-numbers, such as f/1.4 to f/2.8, are very sensitive to defocus and have very shallow depths of focus. High f-numbers, in the f/16 to f/32 range, are highly tolerant of defocus, and consequently have large depths of focus. The limiting case in f-number is the pinhole camera, operating at perhaps f/100 to f/1000, in which case all objects are in focus almost regardless of their distance from the pinhole aperture.

在英语 词典里defocus的定义

字典中散焦的定义是失去焦点。 其他离焦的定义是使焦点不在了。

英语动词DEFOCUS的变化形式

PRESENT

Present

I defocus

you defocus

he/she/it defocuses

we defocus

you defocus

they defocus

Present continuous

I am defocusing

you are defocusing

he/she/it is defocusing

we are defocusing

you are defocusing

they are defocusing

Present perfect

I have defocused

you have defocused

he/she/it has defocused

we have defocused

you have defocused

they have defocused

Present perfect continuous

I have been defocusing

you have been defocusing

he/she/it has been defocusing

we have been defocusing

you have been defocusing

they have been defocusing

PAST

Past

I defocused

you defocused

he/she/it defocused

we defocused

you defocused

they defocused

Past continuous

I was defocusing

you were defocusing

he/she/it was defocusing

we were defocusing

you were defocusing

they were defocusing

Past perfect

I had defocused

you had defocused

he/she/it had defocused

we had defocused

you had defocused

they had defocused

Past perfect continuous

I had been defocusing

you had been defocusing

he/she/it had been defocusing

we had been defocusing

you had been defocusing

they had been defocusing

FUTURE

Future

I will defocus

you will defocus

he/she/it will defocus

we will defocus

you will defocus

they will defocus

Future continuous

I will be defocusing

you will be defocusing

he/she/it will be defocusing

we will be defocusing

you will be defocusing

they will be defocusing

Future perfect

I will have defocused

you will have defocused

he/she/it will have defocused

we will have defocused

you will have defocused

they will have defocused

Future perfect continuous

I will have been defocusing

you will have been defocusing

he/she/it will have been defocusing

we will have been defocusing

you will have been defocusing

they will have been defocusing

CONDITIONAL

Conditional

I would defocus

you would defocus

he/she/it would defocus

we would defocus

you would defocus

they would defocus

Conditional continuous

I would be defocusing

you would be defocusing

he/she/it would be defocusing

we would be defocusing

you would be defocusing

they would be defocusing

Conditional perfect

I would have defocus

you would have defocus

he/she/it would have defocus

we would have defocus

you would have defocus

they would have defocus

Conditional perfect continuous

I would have been defocusing

you would have been defocusing

he/she/it would have been defocusing

we would have been defocusing

you would have been defocusing

they would have been defocusing

IMPERATIVE

Imperative

you defocus
we let´s defocus
you defocus

NONFINITE VERB FORMS

Infinitive

to defocus

Past participle

defocused

Present Participle

defocusing

DEFOCUS的翻译

通过我们的英语多语言翻译器,找到defocus的25种语言翻译

该章节所呈现的将defocus由 英语向其他语言的翻译是通过自动统计翻译获得的；在英语中基本的翻译单位是单词«defocus»。

• 翻译者英语 - 中文: 焦
• 翻译者英语 - 西班牙语: desenfoque
• 英语: defocus
• 翻译者英语 - 印地语: defocus
• 翻译者英语 - 阿拉伯语: يزيل التباؤر
• 翻译者英语 - 俄语: расфокусировки
• 翻译者英语 - 葡萄牙语: desfocagem
• 翻译者英语 - 孟加拉语: defocus
• 翻译者英语 - 法语: défocalisation
• 翻译者英语 - 马来语: Defocus
• 翻译者英语 - 德语: Unschärfe-
• 翻译者英语 - 日语: ピンぼけ
• 翻译者英语 - 韩语: 디 포커스
• 翻译者英语 - 印尼爪哇语: Defocus
• 翻译者英语 - 越南语: defocus
• 翻译者英语 - 泰米尔语: defocus
• 翻译者英语 - 马拉地语: डिफोकस
• 翻译者英语 - 土耳其语: bulanıklaştırma
• 翻译者英语 - 意大利语: defocus
• 翻译者英语 - 波兰语: nieostrości
• 翻译者英语 - 乌克兰语: расфокусировки
• 翻译者英语 - 罗马尼亚语: defocalizare
• 翻译者英语 - 希腊语: αποεστίασης
• 翻译者英语 - 布尔语(南非荷兰语): Defocus
• 翻译者英语 - 瑞典语: defocus
• 翻译者英语 - 挪威语: defokus

与 «DEFOCUS»相关的英语书籍

在以下的参考文献中发现defocus的用法。与defocus相关的书籍以及同一来源的简短摘要提供其在 英语文献中的使用情境。

Depth From Defocus: A Real Aperture Imaging Approach: A Real ...

This book is about passive techniques for depth recovery, where the scene is illuminated only by natural light as opposed to active methods where a special lighting device is used for scene illumination.

A.N. Rajagopalan, 1999

3-D Shape Estimation and Image Restoration: Exploiting ...

This book presents a coherent framework for the analysis & design of algorithms to estimate 3-D shape from defocused & motion blurred images, & to eliminate defocus & motion blur to yield 'restored' images.

Paolo Favaro, Stefano Soatto, 2007

Progress in Optics

Balancing of defocus aberration with spherical aberration or astigmatism 6.1. Focused beam We have seen that the depth of focus is quite large when the Fresnel number is small. Hence, the axial irradiance at a certain distance z < R in the ...

Emil Wolf, 2006

The Eye and Visual Optical Instruments

10.0 Introduction 225 10.1 Types of defocus 227 10.2 Defocus calculations 230 10.3 Depth-of-field 235 10.4 Focussing techniques 238 Exercises and problems 242 Summary of main symbols 243 References and bibliography 243 10.0 ...

George Smith, 1997

Handbook of Image Quality: Characterization and Prediction

The y-axis is JNDs of quality and the x-axis is defocus in mm, with zero defocus corresponding to the best focus position. The simplest model of lens MTF as a function of defocus is the blur circle (geometrical optics) approximation, in which the ...

Brian Keelan, 2002

Optical Imaging and Aberrations: Ray geometrical optics

and sinB— + cos6 dW r 36 (3- 13b) For a radially symmetric aberration W(r), a ray of zone r in the exit pupil plane intersects the Gaussian image plane at a distance ri from the Gaussian image point given by 3.3 DEFOCUS ABERRATION We ...

Virendra N. Mahajan, 1998

Proceedings of the 26th Conference of Spacecraft TTamp;C ...

In practice, the parabolic reflectors of deep space antennas are influenced by many factors, such as fabrication error, gravity and thermal deformation, which induce the feed deviating from the focus of the paraboloid. The feed defocus would ...

Rongjun Shen, Weiping Qian, 2012

Adaptive Optics for Vision Science: Principles, Practices, ...

manually or to set a range and step size (in diopters) for calibrated and automated defocus adjustment. The defocus can be adjusted in open-loop mode or closed-loop mode. In open-loop mode, the appropriate voltages to change the focus of ...

Jason Porter, Hope Queener, Julianna Lin, 2006

Characterizing Effects and Benefits of Beam Defocus on High ...

This dissertation makes contributions towards knowledge of optimizing of laser weapon performance when operating in the air-to-ground (ATG) regime in thermal blooming conditions.

Scott N Long, 2012

Progress in Optics

Balancing 0f defocus aberration with spherical aberration or astigmatism 6.1. Focused beam We have seen that the depth of focus is quite large when the Fresnel number is small. Hence, the axial irradiance at a certain distance 2: < R in the ...

‎2006

包含词语«DEFOCUS»的新条目

找出国内和国际出版社所讨论的内容，以及词语defocus在以下新条目的上下文中是如何使用的。

How Microsoft Almost Won Digital Advertising

That defocus culminated finally in the exit we saw last week from everything but search and paid search. But there was a time when Microsoft ... «AdExchanger, 七月 15»

Bongani Mbindwane

China has had a rough time getting lucrative assets in Europe, their defocus to Greece will also be potentially negative for South Africa as they ... «Daily Maverick, 七月 15»

DNA Test: It's all about Mi … the Xiaomi Mi4i, that is

Swipe left, and you get access to a panorama mode, night mode, manual, beautify mode and a refocus mode that helps to artistically defocus ... «Digital News Asia, 七月 15»

How CEOs can cope up with Digital disorientation

This also means that we have to defocus from some existing business areas. Digital organisations operate at a much higher clock speed and ... «Firstpost, 七月 15»

7 Deadly Sins of Sales

And don't let envy of your competitors strengths defocus you from the task at hand. Develop sales strategies that deliver the value your ... «Pulse, 七月 15»

DNA Test: HTC's One M9+ offers pluses aplenty

The defocus mode on the rear camera needs some distance to work – at least 30cm from a subject at the minimum – along with a suitable ... «Digital News Asia, 六月 15»

Sigma's Newest Full-Frame Wide Zoom Lens Has A Constant F2 …

That low aperture value means you'll be able to achieve great background defocus effects (bokeh), and the lens also includes Sigma's quiet ... «TechCrunch, 六月 15»

First Impressions Review of the New Panasonic Lumix G7

Auto Focus – Panasonic has improved the AF, including a technology called Depth From Defocus, which allows the G7 to calculate the ... «Resource Magazine, 六月 15»

Dell Venue 8 7000 with Intel RealSense Camera Launched in India

Also you can refocus or defocus any section of the image afterwards. Further, this intelligent technology, can can also do area measurements ... «Gizbot, 六月 15»

Kensington Launches SD4000 Universal USB Docking Station …

To move from one window to the next, or to pull up a completely new app or web browser, requires the user to defocus from the work at-hand. «MarketWatch, 六月 15»