Viewability

Question 1

Best possible image considerations (4)

Answer 1

• The viewing cone
• The viewing angle
• The viewing distance
• The overall perceived quality of the final displayed image

Question 2

Maximum viewing distance

Answer 2

viewing distance should be no greater than 200 times the character height.

Question 3

Maximum viewing angle (2)

Answer 3

• should not be viewed at angles greater than 60 degrees from the perpendicular edge of the opposite side of the screen
• maximum off-axis viewing angle is 45 degrees

Question 4

Estimating Throw Distance Formula

Answer 4

Distance = screen width x throw ratio

Question 5

adjustments you can make to correct keystone errors (4)

Answer 5

• Tilting the screen toward the projector
• Adjusting the height of the projector, if the visual environment allows
• Electronic keystone adjustment, which reduces the number of activated pixels in an attempt to “square” the picture
• Optical correction by lens shift: Some projectors have motorized lens shift available in both vertical or horizontal. Vertical lens-shift keystone correction is the most common. This method of keystone correction is preferable to electronic keystone correction because it does not remove any pixels.

Question 6

measuring amount of light coming from the projector

Answer 6

use an illuminance meter set for either footcandles or lux

Question 7

average of full-field brightness

Answer 7

good way to state a display’s brightness

Question 8

nine-zone brightness measurement method

Answer 8

most accurate way to measure display brightness

Question 9

final adjustment can be made to perfect image brightness and contrast

Answer 9

Setting brightness and contrast properly is important so that all detail in an image is represented accurately

Question 10

Grayscale Test Pattern

Answer 10

displays the broadest range of intensities between black and white on the screen.

Question 11

general pointers for creating effective presentations (7)

Answer 11

• Write concise text.
• Simplify the layout.
• Avoid using small type.
• Avoid using fancy fonts.
• Limit the number of fonts used to one or two.
• Work from a set color pallet.
• Avoid using dark letters on a dark background.

Question 12

staggered seating arrangement and tiered floor layout

Answer 12

can increase viewability for the audience by reducing the number of obstacles in the way of the viewer.

Question 13

Projected Image System Contrast Ratio Standard (PISCR)

Answer 13

can be used to determine the brightness and contrast of a projected image.