Connect Module 2 Quiz
Game Controllers
provide an interface that optimizes a users ability to interact with a specific gaming platform- specific input devices
monitor pixel colors
red, green, and blue
high definition TVs (Full HD)
television monitors with 1,080 horizontal lines of pixels, aspect radio of 16:9, resolution of 1920 x 1080 pixels
color depth
"bit depth", a measure of the accuracy of the color of each pixel, number of bits of data describing each pixel of a display ex: iphone 7 plus- 24 bits
Resolution
# of pixels in the cameras sensor
HD Display
1,920 vertical lines of pixels and 1,080 horizontal lines
LCD standard
120 Hz
cut
CTRL + X
common print manufacturers
HP, Lexmark, Brother, Canon
smartboard
a combination input and output device, sometimes used in classrooms, which allows users to interact with large computer displays
output example
a spreadsheet printout, playing a song from spotify, and displaying a youtube video on a TV screen
passive tags
absorb energy while being scanned
3D Printing
also known as additive manufacturing (AM), sprays successive layers of material to create an object
peripheral
an input, output, or storage device connected to a computer, can be located inside or outside the device, can be connected via the wired and wireless means ex: mouse, printer, keyboard, monitor
command + C
copy
trait qualities for biometic recognition
everyone must have the trait, the trait must not change over time, it must be measurably different with each person
smartphone cameras
focus incoming light using active pixels, front + rear facing cameras, video capacity, LED flash, stabilization, and panoramic view capacity; very few come with optical zoom (want a slim phone)
voice recognition technologies
frequency, pitch, speech rhythms- charted and compared to existing records
Adaptive Use Technology
hands-free devices and other mainstream computer input tools, now commonplace tools on smartphones
optical zoom
increases distance between lens and camera sensor- doesnt sacrifice resolution
command + I
italicize
USB Cord
maximum length depends on amount of data transfer, the more data being transmitted, the shorter the cord
projector
output devices that uses light to display video or image output on a surface (often a screen)
thermal printers
paper turns black when heated, less expensive than toner + ink, commonly used for receipts + ATMs
Command + V
paste
touchpad
pointing device that takes up very little space and is ideal for laptops; track finger movement, electron shift
plotter
printer used to print large graphic images by mechanically moving a pen over a large sheet of paper
bluetooth
provides short distance wireless communication between electronic devices using extremely low power radio signals
printers
recreate a computer image onto paper and other substrate, most use ink, toner, or heat-sensitive paper; resolution described as dots per inch (DPI), printer speed described in pages per minute (PPM)
ergonomic keyboard
reduce repetitive stress injuries such as carpel tunnel syndrome
sampling rate
sound is analog- has wavelength and frequency (volume and pitch), computers can only process digital data, convert sound into a digital signal, more samples= higher sampling rate= more accurate sound recording
output devices
speaker, projector, printer, monitor
bluetooth devices
speakers, headphones, sports equipment, health monitors, cameras, car audio, etc;
pages per minute (PPM)
standard measure of a printers speed
optical sensor
takes photo of your fingerprint
LCD
type of monitor display, may have a relative slow refresh rate since it relies on molecular movements
command + z
undo last action
dynamic signature recognition
uses a stylus and touchpad- maps signatures, measure pressure, pen angle, pen up/down, speed, etc
video conferencing
uses cameras, microphones, displays, speakers and software, allows users to both see and hear each other; used by families, professionals, and gamers ex: skype, facetime, hangouts
inkjet printer
uses ink cartridges, relatively low initial cost
ultrasonic sensor
uses sound waves to detect fingerprint patterns
near field communication (NFC)
wireless technology with a short transmission range; used in smartphones, tablets, and appliances, for data transfer and smartcard payments (Apple Pay)
select all
CTRL + A
save
CTRL + S
paste
CTRL + V
projection laser keyboard
any flat surface is your keyboard
output
anything created with a computer ex: displayed on devices, processed data, audio sounds, videos
ultra HD
aspect ratio of 16:9, resolution of at least 3840 pixels x 2160 pixels, 8k UHD is 7680 pixels x 4320 pixels
Webcam
camera that takes photos or streams video into a computer or over the internet; on nearly all laptops and smartphones, allows video-teleconferencing and Skype, can be hacked
fingerprint scanners
capacitance sensor, optical sensor, and ultrasonic sensor
plasma
creates images using cells of ionized red, blue, and green gas
digital zoom
crops and enlarges, image loses resolution
dot pitch
description of the quality of monitor or television screen, distance between two sub-pixels on a display, the closer the spacing, the higher the image resolution (sharper image)
High resolution
desired for enlargements, cropping, and resizing
barcode reader
device commonly used for checkout in stores, measure the reflection of a laser beam
scanner
device that allows you to take a paper document and import it into your computer
contrast ratio
differences in brightness, luminance of white pixels compared to black pixels; the higher the ratio the better the image quality
optical character recognition
digitizes handwritten information; character shape, prior entries frequency of usage
Superzoom
ease of use with high optical zoom capability
Point and Shoot
ease of use with some optical zoom capability
input example
entering text in a word processing program, putting a video from your phone onto your computer, recording a song using MIDI
lower resolution
handy for online sharing and storing large number of photos
waterproof roll-up keyboards
handy for stuffing into your backpack
Organic Light Emitting Diode (OLED)
has the best possible contrast rate, efficiently turn electrons into photons (light), displays can provide very bright screens with very little energy, more expensive (curved and thin)
active tags
have batteries and transmit data
DSLR (Mirrorless)
high resolution with interchangeable lens capacity, 35mm sensor arrays
refresh rate
how fast each pixel is updated; the higher the refresh rate, the smoother the video, measured in Hz, videos play best with rates at even multiples of the frame rate
optical media
includes DVDs + Blue-Rays, data stored using reflective material housed on plastic disk, laser beam "reads" data, DVDs use longer (red spectrum) lasers
stride/gait recognition
individuals can be identified by their stride using technology called biometic gait analysis- can be used at night or through walls with lR cameras or satellites
iris scanning
involves taking a photo of the colored part of the eye and comparing it to a database of images
How a laser printer works
laser "removes" electrons from drum, paper is fed between the drum + toner, charged toner is attracted to drum, toner is melted onto paper
smartphone input devices
microphone, touchpad, motion sensors, cameras, multiple buttons and switches, microUSB port, power port
point of sale devices
modern check-out machines, bar code reader, numbered keypad, scanning wand, credit card reader, touchscreen, MICR, scale, etc
capacitance sensor
most common (iphone), like a laptop touchpad, fingerprint patterns sensed by electron movement
QWERTY keyboard
most common computer keyboard, namd for the first 6 letters on the top row
Laser Printers
most popular printers for offices, use relatively inexpensive toner, great for multiple copies
input devices
mouse, keyboard, microphone, game controller
resolution
number of pixels in a display
optical mark recognition (OMR)
reflection of a laser determines if bubble has been filled, commonly used in standardized testing, #2 pencil
facial recognition software
technologies include feature charting, 3D mapping, skin texture measuring
magnetic ink recognition (MICR)
technology most commonly seen on checks
MEMS Chip
technology that allows cell phone microphones and hearing aids to be so small- can easily fit on a dime
Active Pixel Sensor
technology used by smartphones to create an image; ex: inexpensive digital cameras, senses light, allows for high speed photos/videos, used in all webcams, smartphones, and most digital cameras
ergonomics
the art and science of creating output that provides information in the most useful manner
frame rate
the number of times per second a frame in a movie or video is advanced; measured in frames per second (FPS) ex: cinema standard- 2.4 frames per second
Musical Instrument Digital Interface (MIDI)
the technology that allows a computer to serve as a sound studio
Liquid Crystal Display (LCD)
uses molecules to block or allow light to pass through filters, electrodes twist molecules so they align w/ a colored pixel filter to determine pixel color + intensity; light is provided by a source behind the layers (most laptops, tablets, and smartphones)
radio frequency identification (RFID)
uses radio waves to transmit data to 2 categories; passive tags and active tags (both are good for tracking inventory)
laser printer
uses toner cartridges, relatively high initial cost
aspect ratio
width of a screen compared to the height ex: 4:3- traditional TV, HD- 26:9
static signature recognition
written signature is scanned and mapped
Conservative refresh rate
60 Hz
