how to detect oval shape

i want to detect oval shape only in image. how can i do this using matlab in easy way. http://i1108.photobucket.com/albums/h404/abdulhadi3/ConferenceSurveyForm.png

Answer 1

[Walter Roberson]

Probably much like the code Chandra provided you for detecting squares, except changing the arguments to the rectangle() call a bit. The rectangle() call is able to draw ovals if you give it the proper arguments. regionprops() can tell you the major and minor axes of the object.