HUMAN-COMPUTER NTERACTION phone pad and T9 entry · use numeric keys with multiple presses 2-abc 6-mno 3-def 7-pgrs 5 4-g h 8-tuv 5-jk I 9-WXyZ heo=4433555[ pause]555666 surprisingly fast T68 ·T9 predictive entry type as if single key for each letter use dictionary to 'guess the right word he|o=43556 but 26-> menu amor an
phone pad and T9 entry • use numeric keys with multiple presses 2 – a b c 6 - m n o 3 - d e f 7 - p q r s 4 - g h i 8 - t u v 5 - j k l 9 - w x y z hello = 4433555[pause]555666 surprisingly fast! • T9 predictive entry – type as if single key for each letter – use dictionary to ‘guess’ the right word – hello = 43556 … – but 26 -> menu ‘am’ or ‘an’
HUMAN-COMPUTER NTERACTION Handwriting recognition o Text can be input into the computer using a pen and a digesting tablet natural interaction Technical problems capturing all useful information-stroke path pressure, etc in a natural manner segmenting joined up writing into individual letters interpreting individual letters coping with different styles of handwriting Used in PDAs, and tablet computers leave the keyboard on the desk
Handwriting recognition • Text can be input into the computer, using a pen and a digesting tablet – natural interaction • Technical problems: – capturing all useful information - stroke path, pressure, etc. in a natural manner – segmenting joined up writing into individual letters – interpreting individual letters – coping with different styles of handwriting • Used in PDAs, and tablet computers … … leave the keyboard on the desk!
HUMAN-COMPUTER NTERACTION Speech recognition · Improving rapidly Most successful when single user initial training and learns peculiarities limited vocabulary systems Problems with external noise interfering imprecision of pronunciation large vocabularies different speakers
Speech recognition • Improving rapidly • Most successful when: – single user – initial training and learns peculiarities – limited vocabulary systems • Problems with – external noise interfering – imprecision of pronunciation – large vocabularies – different speakers
HUMAN-COMPUTER NTERACTION Numeric keypads for entering numbers quickly calculator, pc keyboard ● for telephones 123789 not the same 区网 8|9 2‖3 ATM like phone o#旧 telephone calculator
Numeric keypads • for entering numbers quickly: – calculator, PC keyboard • for telephones not the same!! ATM like phone 4 5 6 7 8 9 * 0 # 1 2 3 4 5 6 1 2 3 0 . = 7 8 9 telephone calculator
HUMAN-COMPUTER NTERACTION positioning, pointing and drawing mouse, touchpad trackballs, joysticks etc touch screens tablets eyegaze, cursors
positioning, pointing and drawing mouse, touchpad trackballs, joysticks etc. touch screens, tablets eyegaze, cursors