- Extract the red channel from the RGB image.
- Align image so that upper left circle is at some known location, and lower right circle is at some known location.
- Define a template that is a little square or circle.
- Get a sub image from every one of the 5 columns in a row of circles.
- Find out which one has the lowest mean - use mean2().
- From the mean, assign an answer of A-E based on which column had the lowest mean.
how to detect answers which student chose it in answer sheet
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hi , i want steps to create program to detect answers from answer sheet ex : (detect that student chose 'A' in question '1' in attached image ) thanks in advance
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Image Analyst
el 24 de En. de 2015
The steps are
[selection, theAnswer] = min(theMeansForThisRow);
Not too hard (actually, easy ) except step 2 might be a little hard if the images are not aligned already.
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AminaOsmanova
el 11 de Feb. de 2017
Please could you help me too.I can`t compare detected answers with the actual answer key stored in an excel sheet. Please help me
Image Analyst
el 11 de Feb. de 2017
OK, how can I do that?
Read this link and then post your question along with your image and your code that you adapted from this question.
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