Homework C 8 Flashcards
(35 cards)
On your monitor every dot or pixel you see is made up of a combination of ___ (how many) colors.
3
With ___ color, each intensity is a 1-byte numeric quantity represented as a binary or hexadecimal number.
RGB
When all the RGB color settings are set to 0, the color displayed is ____.
black
When all the RGB color settings are the same and they are not white or black, the color displayed will be ___.
Grey
If you increase the values in an RGB setting, the result will be a ____ (lighter or darker) color.
Lighter
___ is the size of difference between the darkest and lightest portions of an image.
Contrast
Continuous signals, like sound, have a wave pattern and are called ___ signals.
Analog
The ____ of sound is how often we take a measurement of a sound wave. The faster it is, the more accurately the wave is recorded.
Sampling Rate
The ____ says that this above rate must be at least twice as fast as the fastest frequencey.
Nyquist Rule
Digital audio has a standard sampling rate of ____ Hertz and uses ___ bits for its representation.
44,100 and 16
A ____ like a microphone captures sound, converts it to electrical signals, and then sends it to a(n) ______ converter to make it digitial.
Transducer And ADC (analog to digital converter
On the computer, ____ means to store or transmit information with fewer bits.
compression
__ is used in recording and compressing sound and gets a 10:1 compression ratio.
MP3
One method of reducing the number of needed bits is ____, used by fax machines, which specifies the number of 0’s, then the number of 1’s, then the number of 0’, etc.
run-length encoding
The above is a ___ scheme, meaning that the original represenation of 0’s and 1’s can be perfectly reconstructed from the altered version.
lossless
The technical term for brightness is ____ and the technical term for differences in color is ____.
Luminance, chrominance
____ images use 3 bytes to represent a pixel, while ___ images only use 1 byte.
JPEG, GIF
The motion picture industry uses ____ as its compression scheme which utilizes the small differences from one frame to the next to improve compression.
MPEG
A process that allows the computer to “read” printed characters is called ____.
OCR
___ invented text-to-speech technology.
Ray Kurzweil
Technology to read a license plate as a car is traveling requires a ___ which recognizes when to “snap” a picture, something to recognize the features on the plate and a ___ to match these features to known letters and numbers.
Frame grabber, classifier
The new square codes (vs. the standard bar codes) are called ___ codes.
QR
The fuzzy, wiggly text-deciphering words needed to access certain web sites are called ____.
Captchas
The creation of a digital representation of a complete world is called ____.
virtual reality
