On partitioning a dictionary for visual text recognition
Pattern Recognition
Fast dictionary look-up for contextual word recognition
Pattern Recognition
CHI '93 Proceedings of the INTERACT '93 and CHI '93 Conference on Human Factors in Computing Systems
LetterWise: prefix-based disambiguation for mobile text input
Proceedings of the 14th annual ACM symposium on User interface software and technology
Flexible pattern matching in strings: practical on-line search algorithms for texts and biological sequences
Phrase sets for evaluating text entry techniques
CHI '03 Extended Abstracts on Human Factors in Computing Systems
Text entry from power wheelchairs: edgewrite for joysticks and touchpads
Assets '04 Proceedings of the 6th international ACM SIGACCESS conference on Computers and accessibility
Relaxing stylus typing precision by geometric pattern matching
Proceedings of the 10th international conference on Intelligent user interfaces
Unipad: single stroke text entry with language-based acceleration
Proceedings of the 4th Nordic conference on Human-computer interaction: changing roles
Automatic whiteout++: correcting mini-QWERTY typing errors using keypress timing
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
TypeRight: a keyboard with tactile error prevention
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
Usable gestures for blind people: understanding preference and performance
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
Typing on flat glass: examining ten-finger expert typing patterns on touch surfaces
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
The 1line keyboard: a QWERTY layout in a single line
Proceedings of the 24th annual ACM symposium on User interface software and technology
Reducing visual demand for gestural text input on touchscreen devices
CHI '12 Extended Abstracts on Human Factors in Computing Systems
Disambiguation of imprecise input with one-dimensional rotational text entry
ACM Transactions on Computer-Human Interaction (TOCHI)
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We present an eyes-free text entry method for mobile touchscreen devices. Input progresses by inking Graffiti strokes using a finger on a touchscreen. The system includes a word-level error correction algorithm. Auditory and tactile feedback guide eyes-free entry using speech and non-speech sounds, and by vibrations. In a study with 12 participants, three different feedback modes were tested. Entry speed, accuracy, and algorithm performance were compared between the three feedback modes. An overall entry speed of 10.0 wpm was found with a maximum rate of 21.5 wpm using a feedback mode that required a recognized stroke at the beginning of each word. Text was entered with an overall accuracy of 95.7%. The error correction algorithm performed well: 14.9% of entered text was corrected on average, representing a 70.3% decrease in errors compared to no algorithm. Where multiple candidates appeared, the intended word was 1st or 2nd in the list 94.2% of the time.