Canny Edge and Hough Circle Transformation for Detecting Computer Answer Sheets

The use of the computer answer sheet media as a medium for writing answers has now become a necessity, this is because the computer answer sheet media is considered to be very easy and fast in the correction process. Some research and implementation applied in solving cases of correction computer answer sheet with various methods, but the use of inappropriate methods will affect the results that are less than the maximum in detecting. Some use the detection of circles which are not precise so that it has the potential to detect answers that should not be detected with clearly. This study propose Canny and Hough circle transformation method for enhanced by calculating the distance between answers to increase accuracy by 95.75%. This can be used as a basic method in making detection devices.