ЧТО ОЗНАЧАЕТ СЛОВО DEFOCUS
Дефокусировка аберрации
В оптике дефокусировка - это аберрация, при которой изображение просто не в фокусе. Эта аберрация знакома всем, кто использовал камеру, видеокамеру, микроскоп, телескоп или бинокль. Оптически дефокусировка относится к сдвигу вдоль оптической оси от плоскости или поверхности наилучшего фокуса. В общем, дефокусировка уменьшает резкость и контрастность изображения. То, что должно быть резким, высококонтрастные края в сцене, становятся постепенными переходами. Тонкая деталь в сцене размыта или даже становится невидимой. Почти все оптические устройства, формирующие изображение, включают в себя некоторую форму регулировки фокусировки для минимизации расфокусировки и максимального качества изображения. Степень размытости изображения для заданного количества сдвига фокуса обратно зависит от f-числа объектива. Низкие f-номера, такие как f / 1,4 до f / 2.8, очень чувствительны к расфокусировке и имеют очень малую глубину фокуса. Высокие f-числа в диапазоне f / 16 до f / 32 отличаются высокой толерантностью к дефокусировке и, следовательно, имеют большую глубину фокусировки. Предельным случаем в f-номере является камера-обскура, работающая, возможно, от f / 100 до f / 1000, и в этом случае все объекты находятся в фокусе почти независимо от их расстояния от апертуры отверстия.
Значение слова defocus в словаре английский языка
Определение дефокусировки в словаре заключается в том, чтобы выйти из фокуса. Другое определение дефокусировки заключается в том, чтобы выходить из фокуса.
СПРЯЖЕНИЕ ГЛАГОЛА DEFOCUS
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
Past participle
defocused
Present Participle
defocusing
КНИГИ НА АНГЛИЙСКИЙ ЯЗЫКЕ, ИМЕЮЩЕЕ ОТНОШЕНИЕ К СЛОВУ «DEFOCUS»
Поиск случаев использования слова
defocus в следующих библиографических источниках. Книги, относящиеся к слову
defocus, и краткие выдержки из этих книг для получения представления о контексте использования этого слова в литературе на английский языке.
1
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.
2
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
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 ...
4
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 ...
5
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 ...
6
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
7
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
8
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
9
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.
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 ...
НОВОСТИ, В КОТОРЫХ ВСТРЕЧАЕТСЯ ТЕРМИН «DEFOCUS»
Здесь показано, как национальная и международная пресса использует термин
defocus в контексте приведенных ниже новостных статей.
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How CEOs can cope up with Digital disorientation
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7 Deadly Sins of Sales
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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, Июн 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, Июн 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, Июн 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, Июн 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, Июн 15»