Page 2 - Scripts; Ashish Krishna; Abstract; Keywords
Gesture Keyboard - User centered design of a unique input device for Indic Scripts Ashish Krishna 1 , Rahul Ajmera 1 Human Factors International 4 th Floor, Chemtex House Hiranandani Gardens Mumbai – 400 076 {ashish.krishna, rahul.ajmera}@hp.com 1 Currently at HP labs Sandesh Halarnkar and Prashant ...
Page 3 - typical computer setup with a gesture keyboard; Need for a Devnagari input device; More than one modifier can be attached to one consonant; Issues with using an Inscript Keyboard
Figure 1: typical computer setup with a gesture keyboard 2.1 Need for a Devnagari input device Computer usage in India is almost entirely in English and is restricted to the English-speaking, upper and upper-middle class people. This stands in direct contrast with the demand for communication in Ind...
Page 4 - Inscript keyboard (with multiple characters on a single key); Introduction to the GKB; Gestures
Figure 2: Inscript keyboard (with multiple characters on a single key) Commercially the demand for Devnagari input has been patched by the Inscript keyboard. This is essentially a QWERTY keyboard with Devnagari characters mapped onto the keys. The minimum number of characters that are required even ...
Page 5 - Varnmala layout; Feedback
3.2 Spatial mapping of gestures In order to limit the technological complexity of recognition and thereby trying to reduce instances of errors, we have mapped the gestures on the coordinates of the writing space. This means that the number of elements that needs to be recognized has been reduced. Th...
Page 6 - Finalizing keys and layout size; The users should be able to see the key label
3.5 Deleting using the GKB The Devnagari script is very differently from roman scripts because of the conjuncts it forms when Consonant-Consonant-Vowel modifier, Consonant-Vowel-Vowel combination happens. So, in the case of normal ‘backspace’ where 1 unicode is deleted at a time and it becomes very ...
Page 7 - User study; Objective; HP labs Employee (who know Hindi and occasionally write in Hindi); Apparatus; tip and 9mm diameter grip pen
4.1 User study 4.1.1 Objective The objective of this exploration was to find the average size users take to write consonants and modifiers (matras) and to find relationship between handwriting styles with different pen grip diameter and tip thickness. 4.1.2 Method Each user was given a Hindi paragra...
Page 8 - Evaluation method; Character study; Analysis; tip and 12mm diameter pen; and
Figure 6: Pens used for study (middle one is the stylus) 4.1.4.3 Hindi corpus used: The Hindi paragraph used for this user study was taken from the BBC’s Hindi news portal (http://www.bbc.co.uk/hindi/news/020419_vajpayee_ac.shtml) and was modified a bit so that we could get all the nuances of Hindi ...
Page 9 - percentile data so that almost all of the
Bottom strip. Since, the dataset was very distributed, we adhered to the 90 th percentile data so that almost all of the population could be accommodated. Top Strip Size Plot 4.19 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 0 5 10 15 20 25 Participants size in mms sizes in mms 90th percentile data top strip Cor e...
Page 10 - the no of participants); Results; Final layout
Bottom Strip Size Plot 3 0 1 2 3 4 0 5 10 15 20 25 Participants size in mms sizes in mms 90th percentile data Figure 9: Graphs showing cluster data for handwriting samples (X axis shows the size in mm and Y axis denotes the no of participants) 4.1.7 Results The final gesturable keypad sizes, which i...
