توانبخشي به معلولين براي ارتباط با رايانه از طريق تايپ حروف با حركات چشم

Rehabilitation to Handicapped for Communication with Computer via Type of Letter byEye Movement

Objective : Nowadays comp uter s are contr olled by hand with some too ls like mouse and keyboard generally, so peop le that canʹt use their hands arenʹt able La use these tools . This re search was aimed to design a system, which help handicapped peop le to type by thei r eye movement. Materials & Metho ds: In this de sign, boarder between iris and sclera which is ca lled limbus is tracked with the Infra Red transmitti ng and receiving system. Then software will process measured values , and will change them to proper values for moving cursor on charac ters. Si nce changing the user , unwanted head movements can affec t on sys tem operation , a calibration stage is considered which adjus t the sys tem in new cond ition. The sys tem was implemented on 10 subj ects (5 women & 5 men) and data were analyzed . Results: Distance reso lution of system on 15" monitorʹs screen is abo ut 4.1 1±3.38 cen time ters . People with no experience can type a sentence with 14 characters in 3:30 minute by 28% error and an experienced person ca n type this se ntenc e in 3 minute with 13% error. So the sys tem with rela tively high repeatab ility allows the user to communicate with computer by his eye movements. Conclus ion : Th is system is able to recognize 12 points on mon itorʹ s screen . Eac h point is belo nging to one character. Faci lity of using the system and no co ntact betwee n system and eye are from the benefits of the sys tem .