extract rectangular image from scanned image
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I have scanned copies of currency notes from which I need to extract only the rectangular notes. Although the scanned copies have a very blank background, the note itself can be rotated or aligned correctly. I'm using matlab. how do I extract the currency part and get it aligned to the horizontal axis. I have tried using thresholding and canny/sobel edge detection to no avail. I used the below code but it works only for aligned images and not for rotated images.
<< input image
output image
>>
1 个评论
hamida
2022-12-2
Affy, please can you tell me how you solved this problem.
回答（2 个）
Image Analyst
2015-3-30
0 个投票
Did you see my answer to your prior question: http://www.mathworks.com/matlabcentral/answers/182427#comment_271921
Did you look up "registration" in the help and try any of the examples with your image?
Image Analyst
2015-3-31
0 个投票
I'll be traveling today and not have much time. I'm attaching another demo that uses the radon transform to do rotation. Give that a try.
4 个评论
AFFY
2015-3-31
Image Analyst
2015-3-31
It's under the image.
AFFY
2015-3-31
that isn't helping either.
Image Analyst
2015-3-31
Then try another method. I'm getting ready to fly to Arizona today and will not have much time to help anyone.
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