detect location answer in survey form

how to differentiate between location of answer.it means the location of answer is detected according to the number of questions.there is the sample.http://i1108.photobucket.com/albums/h404/abdulhadi3/ConferenceSurveyForm.png

somebody help, i am new in this field

Answer 1

[Image Analyst]

Just set up a template - a list of rectangular regions where you will look. Each region will have a top row, bottom row, left column and right column. Then get the mean of the image there:

subImage = grayImage(topRow:bottomRow, leftCol:rightCol);
meanValue = mean(subImage(:));

If the mean is lower than some value, it's dark, if not, it's bright. That should be plenty of information to complete the project.

[Abdul]

sorry, i have try but cannot run.can u give an example.