DPaC/UniBas/2020 at University Of Basel | Flashcards & Summaries

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# Lernmaterialien für DPaC/UniBas/2020 an der University of Basel

Greife auf kostenlose Karteikarten, Zusammenfassungen, Übungsaufgaben und Altklausuren für deinen DPaC/UniBas/2020 Kurs an der University of Basel zu.

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Colour models (5)

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• RBG
• digital cameras
• HSV
• artists
• HIS
• similar to HSV
• YCbCR
• digital video (JPEG, MPEG)
• CMY, YMYK
• printers
Lösung ausblenden
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Why do we need control?

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Compensate for inaccuracy due to

• Modelling our system
• Disturbances from the outside that we don't know in beforehand
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Computer Graphics

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Image synthesis

Abstract description --> Image

Example: textfile to image (architecture)

Lösung ausblenden
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Absorption

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Process by which the energy of a photon is taken up by another entity (atom)

• photon is destroyed
• absorbed energy ma be re-emitted/converted into heat energy
• amount of absorption varies with the wavelength of the light (leading to colour in pigments

Example: Wall, absorbing surface have properties that depend on the wavelength of the light

Lösung ausblenden
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Simple image model

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• Image as 2D light function f(x,y)
• the values of coordinates (x,y) have the intensity of the image at that point
Lösung ausblenden
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FT of the Neighbourhood function

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FT over the Tessellation is a 3D Sinc function

• has negative values
• has infinite support
• p(x,y) is real and F(u,v) is too
• neighbourhood filter will not change the phase, but their amplitude
• P(u,v) becomes negative for some u,v some frequencies undergo a complete phase reversal
• shift over pi
Lösung ausblenden
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Discrete time sinusoidal signals;

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Digital signal

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What are the parameters that human eyes can perceive?

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1) Wavelength as colours

2) Direction as viewpoints

3) Amplitude as brightness

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3 Levels of Optics

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1. Geometrical optics
1. light is represented as a wave, if it hits a body, it changes its direction
2. can be calculated with Snell's law
2. Physical Optics
1. Light as a wave which interacts with a body
2. If the light hits a filter, only parts of the light goes through
3. Quantum-mechanical Optics
1. required to explain aspects like emission, absorption, ect.
Lösung ausblenden
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4 Basic types of interaction

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Absorption

Scattering

Refraction

Reflection

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Trivia:

Lights from the sun is scattered. We use polarized sunglasses to prevent glare, which blocks;

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Horizontal light waves

Lösung ausblenden
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Types of systems

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TESTE DEIN WISSEN
• Open loop
• 1 input, 1 output
• no control
• Closed loop
• 1 input, 1 output
• model inside the system that gives some sort of control
Lösung ausblenden
• 48608 Karteikarten
• 997 Studierende
• 37 Lernmaterialien

## Beispielhafte Karteikarten für deinen DPaC/UniBas/2020 Kurs an der University of Basel - von Kommilitonen auf StudySmarter erstellt!

Q:

Colour models (5)

A:
• RBG
• digital cameras
• HSV
• artists
• HIS
• similar to HSV
• YCbCR
• digital video (JPEG, MPEG)
• CMY, YMYK
• printers
Q:

Why do we need control?

A:

Compensate for inaccuracy due to

• Modelling our system
• Disturbances from the outside that we don't know in beforehand
Q:

Computer Graphics

A:

Image synthesis

Abstract description --> Image

Example: textfile to image (architecture)

Q:

Absorption

A:

Process by which the energy of a photon is taken up by another entity (atom)

• photon is destroyed
• absorbed energy ma be re-emitted/converted into heat energy
• amount of absorption varies with the wavelength of the light (leading to colour in pigments

Example: Wall, absorbing surface have properties that depend on the wavelength of the light

Q:

Simple image model

A:
• Image as 2D light function f(x,y)
• the values of coordinates (x,y) have the intensity of the image at that point
Q:

FT of the Neighbourhood function

A:

FT over the Tessellation is a 3D Sinc function

• has negative values
• has infinite support
• p(x,y) is real and F(u,v) is too
• neighbourhood filter will not change the phase, but their amplitude
• P(u,v) becomes negative for some u,v some frequencies undergo a complete phase reversal
• shift over pi
Q:

Discrete time sinusoidal signals;

A:

Digital signal

Q:

What are the parameters that human eyes can perceive?

A:

1) Wavelength as colours

2) Direction as viewpoints

3) Amplitude as brightness

Q:

3 Levels of Optics

A:
1. Geometrical optics
1. light is represented as a wave, if it hits a body, it changes its direction
2. can be calculated with Snell's law
2. Physical Optics
1. Light as a wave which interacts with a body
2. If the light hits a filter, only parts of the light goes through
3. Quantum-mechanical Optics
1. required to explain aspects like emission, absorption, ect.
Q:

4 Basic types of interaction

A:

Absorption

Scattering

Refraction

Reflection

Q:

Trivia:

Lights from the sun is scattered. We use polarized sunglasses to prevent glare, which blocks;

A:

Horizontal light waves

Q:

Types of systems

A:
• Open loop
• 1 input, 1 output
• no control
• Closed loop
• 1 input, 1 output
• model inside the system that gives some sort of control

### Erstelle und finde Lernmaterialien auf StudySmarter.

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## Das sind die beliebtesten StudySmarter Kurse für deinen Studiengang DPaC/UniBas/2020 an der University of Basel

Für deinen Studiengang DPaC/UniBas/2020 an der University of Basel gibt es bereits viele Kurse, die von deinen Kommilitonen auf StudySmarter erstellt wurden. Karteikarten, Zusammenfassungen, Altklausuren, Übungsaufgaben und mehr warten auf dich!

## Das sind die beliebtesten DPaC/UniBas/2020 Kurse im gesamten StudySmarter Universum

##### USTR_WS_2020

Fachhochschulstudiengänge Krems IMC

##### SS 2020

FernUniversität in Hagen

##### 2020

Tierärztliche Hochschule Hannover