Visual Principles of Design Flashcards
Text height x 150 =
Maximum distance from the screen
If the text heigh is 3”, the maximum viewing distance is ____________
37.5 feet
The first row of a viewing area should not be closer than the screen _________
Width
A good viewing area is ____ degrees off-axis in either direction
45
An image is 60 inches high, with an aspect ratio of 16:9
What is the width of the image?
106.7 inches
A conference room requires videoconferencing and AV presentation capabilities. Which of the following design elements are defined by architectural dimension and orientation of the room?
- Display Size
- Display Type
- Display aspect ratio
- Display Brightness
Display size
Used to measure light coming directly from a source
Incident meter
Spot meter is used to measure the ______________
light reflected off an object back to the meter
Three units of light measure in AV industry
- Lumens
- Lux
- Footcandles
Projectors use ______ to describe light output
Lumens
Quantitative measure of the brightness of a light source or illuminated surface
Luminance
System Black is ________
Lowest level of luminance a system is capable of producing.
Relationship between the brightest color (white) and the darkest (Black)
Contrast Ratio
What’s the Projected Image System Contrast Ratio for basic decision making?
15:1
For measuring Contrast Ratio, is recommended to measure from how many viewing positions?
5
Refers to the distance between the projector and screen, factoring lens type and manufacturer specs.
Throw Distance
Projector has a throw ratio of 2.5:1
The screen width 72 inches
What is the Throw Distance?
Throw Distance = Screen Width * Throw Ratio
180 inches
Is the ability of a projection screen to redirect projected light
Screen Gain
What is the recommended highest level of ambient lighting level illuminating a front-projection screen withing a conferencing space?
5 footcandles or 50 lux
A matte projection screen has a gain of _____
1
Lamp life is defined as the time the bulb reaches ____ percent of initial output
50%
In a videowall design, _________ is the process of adjusting the edges of multiple projected images
Blending
