CGS 2060 computer input
Video Teleconferencing (VTC)
-Skype -Google+ -Hangouts -Apple Facetime
roll-up keyboard
-easily stuff into backpack
eye recognition systems
-iris recognition -retina recognition
scanners
-puts paper documents into a digital format that can be viewed or manipulated on a computer
extreme action video camera options
-GoPro's Hero 4 -iON Air Pro -SONY Action Cams -etc
projection laser keyboard
-allow any flat surface to the keyboard
input devices
-allow data and signals to enter a computer
OCR (Optical Character Recognition)
-allows any text, even handwritten scrawls, to be digitized -uses algorithms that estimate the likelihood of the word that is being written based on character shape, prior entries, and frequency of usage -more often users enter data into OCR software, the more likely the software will correctly "guess" the intended entry
pixel sensor
-allows tiny smartphone cameras to create an image
DSLR camera
-allows you to look directly through the lens -high resolution with interchangeable lens capability
facial recognition
-attempts to identify individuals by specific features -methods include: 3D mapping, relative feature charting, skin texture identification, combo of these
fingerprint scanners
-capacitance sensor -optical sensor -ultrasonic sensor
microphones
-change sound waves into electrical signals -most use a sound sensitive diaphragm over an electrically charged capacitance plate -diaphragm's movement causes the electrons to move creating an electrical current
superzoom camera
-ease of use with high optical zoom capability
point-and-shoot camera
-ease of use with some optical zoom capability
biometrics examples
-fingerprints -eye retinas and irises -facial bone structure -palm prints -stride -typing patterns -speech recognition
scanner options
-flatbed scanners (usually incorporated with printers/copier) -hand-held or wand scanners -MICR readers -bar code scanners -OMR scanners
OMR (Optical Mark Recognition) scanning
-found in standardized tests -students fill in bubbles with #2 pencils -scanner uses a laser that is reflected by the mark made -makes test grading faster and more accurate so most standardized tests now use multiple choice or true/false questions
ergonomic keyboard
-help reduce repetitive stress injuries such as carpel tunnel syndrome
MEMS (MicroElectrical-Mechanical System) chip
-houses diaphragm/capacitance plate combo for microphones
input device examples
-keyboard -mouse -touchpad -touchscreen -camera -microphone -game controller
retina recognition
-less common because retina has many blood vessels -low-power infrared beam is shined in the eye -blood vessels absorb more light than the rest of the retina which causes different blood vessel patterns
gait analysis
-looks at step length, step width, walking speed -angles formed by the trunk, hip, knee, ankle and foot are measures and compared with stored identification data -valuable because it can be used at night or through walls with infrared cameras or even with satellite imagery
3D mapping
-maps the depth of eye sockets, forehead dome, etc
barcode readers
-measures reflection of a laser beam -black bars of the UPC absorb more of the laser's light than the surrounding area -difference is detected by receptors in the scanner
relative feature charting
-measures the distance between eyes, mouth, nose, etc
iris recognition
-most common -iris is photographed -patterns of colors are compared to a database of irises
touchpad
-most use a capacitance system to track finger movement across the touchpad -fingers conduct electrons and the touchpad senses this electron movement -gloves or dry fingers can be problematic
QWERTY keyboard
-named for the first 6 top-row letters from the left -most common computer keyboard -developed to keep 19th century typewriters from jamming
RFID (Radio-Frequency Identification)
-radio waves transmit data -passive tags absorb energy while being scanned and then transmit data to the scanner -active tags have batteries and transmit data continuously -can be extremely small and inexpensive
speech recognition
-records, maps, and analyzes voice patterns -voice frequency, pitch, speech rhythms, and other characteristics are charted and compared to existing records -increasingly used in telephone banking and for other financial transactions, smartphones, as well as by governmental agencies for security purposes
extreme action video cameras
-rugged, water-resistant -allow users to film high-definition video under harsh conditions -often mounted on helmets -most incorporate video stabilization and background noise dampening microphones
NFC (Near Field Communication)
-short-range wireless connectivity standard that uses magnetic field induction to enable communication between devices when they're touched together or brought within close proximity -ex: Apple Pay
static method signature identification
-signatures are written on paper and then scanned -the software then maps the signature
optical sensor
-takes a photo of your fingerprint -has disadvantage of not working well when the sensor or fingers are dirty
webcams
-takes photos or streams video into a computer or over the internet
specialized stylus-equipped touchpad
-used by artists and graphic designers -allow them to create brush strokes, calligraphy, and other artist options
MICR (Magnetic Ink Recognition)
-used on checks -can be quickly processed by cashiers and banks -characters written with ink containing iron oxide detected -info typically includes: bank's routing number, checking account identification, check number
dynamic method signature identification
-uses a stylus and touchpad -maps the signature and also measures pressure, pen angle, pen up/down, speed, etc
biometrics
-uses human traits for identification -everyone should have the trait but it must be unique to each individual -trait shouldn't change over time
POS (Point-Of-Sale) devices
-uses multiple input devices -grocery check out
ultrasonic sensor
-uses the reflection of sound waves to detect the patterns on your fingerprint
capacitance sensor
-works like a laptop's touchpad or a phone's touchscreen -uses electron movement to sense fingerprint patterns