Vision Systems

Question 1

What is vision mapping?

Answer 1

is a projection technology used to turn objects often irregularly shaped into a display

Question 2

What factors affect vision systems?

Answer 2

amount of lumens, rigging locations, screen sizes and aspect ratio, indoor vs outdoor use

Question 3

What is the visions relationship with staging?

Answer 3

make sure that vision systems dont interfere with scenery, positioning of set, video mapping on objects

Question 4

vision interrelationship with lighting?

Answer 4

helps to ensure that the lighting doesnt overbear the vision systems, ensuring no unwanted shadows and clashes,

Question 5

Vision interrelationship with audio?

Answer 5

if audio is required they must work together to ensure they sync up correctly and also that they have the same creative vision to ensure the audio and vision work together

Question 6

Vision interrelationship with costuming?

Answer 6

they interact with each other when a specific image is desired to be projected onto a piece of costume e.g. Jennifer Lopez’s Dress for the song Feel the Light

Question 7

key features of analogue signals

Answer 7

continuous signals, represented by sine waves, records sound waves as they are,( works for human voice, natural sound), continuous range of values, only suited for analog devices

Question 8

key features of digital signals

Answer 8

discrete signals, represented by square waves, converts to binary wave forms, (works for computers, optical drives and other electronic devices, discontinuous values, suited for electronics

Question 9

What is the relationship between digital and anlog signals?

Answer 9

They both exchange and convert the different signals to deliver to different outputs and return to the original source.

Question 10

What are the three elements of a vision system?

Answer 10

Sources (Inputs), Processors and Outputs

Question 11

Examples of vision system Sources

Answer 11

Live feed camera `
Computer / Laptop / iPad (including software elements)
DVD / VHS / Blue ray player

Question 12

Examples of vision systems Processors

Answer 12

Switcher or Mixer
Distribution Amplifier (VDA)
Scan Converters
DAC
Splitter

Question 13

Examples of vision system outputs

Answer 13

Monitors (including Cueing monitors, LED, LCD and Plasma)
Projectors (including DLP, LCD and LED technologies)

Question 14

What is a live feed camera?

Answer 14

Commonly described as webcams that produce live footage of events and in the moment shots. Essentially they take a video signal coming from a camera that might not be immediately readable or streamable by your computer and convert it into a signal that will be compatible with your streaming platform.

Question 15

What is the aspect ratio?

Answer 15

Determines the width and height of an image
Common ones includes:
4:3 (1.33:1)
16:9 (1.78:1)
Want size on right to be able to broken down to 1

Question 16

What is resoloution

Answer 16

More pixels = clearer images with more detail

Question 17

If you are projecting from the ceiling, where should a projector be mounted?

Answer 17

Should be mounted on the ceiling, upside down so it is facing toward the screen

Question 18

What is throw distance?

Answer 18

The distance between the projector and the image on the screen (i.e., the distance that the image is “thrown”). Throw distance is the basis for determining the projection screen size possible for use.

Question 19

How should the throw distance be calculated?

Answer 19

measuring the distance from the projector’s lens to the projection screen that the image is being cast onto. Using the formula:

PD=RxS

PD= Projection distance
R= Throw Ratio (lens ratio)
S= Screen width

Question 20

Why is finding the correct throw distance helpful?

Answer 20

Correct calculation of the amount of cable required
Rapid bump in
Clear images with full screen coverage
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