Houbakht Attaran - Lecturer in Khavaran high educational institute Mashhad, Iran
Fatemeh Sarani Rad - M.sc student of university of Economic science(Tehran) Mashhad, Iran
Shideh Nessari Ashkezari - M.sc student of Ferdowsi University of Mashhad International Branch Mashhad, Iran
Marzieh Rezazadeh - Teacher of technical schools Mashhad, Iran

the aim of this study is to explain an algorithm for identifying checked choices in multiple choices question exam. The target is considered, finding numbers of correct checked tests and recognizing students ID for each answer sheet, base on Black Square. This algorithm uses Morphological operations to eliminate noises and to find distinctive features of image in answer sheet. To identify checked choices, it uses the apparent properties of answer sheet. In final analysis section, system is tested in different situation and it shows that system is resistant to few image rotation and intensity changing, however it is sensitive to state of checking (square must be completely checked in black).

component; Image Rotation; Optical Mark Recognition; checking multiple choice question exams; Morphological Operation