Effacer les filtres
Effacer les filtres

extract rectangular image from scanned image

2 vues (au cours des 30 derniers jours)
AFFY
AFFY le 28 Mar 2015
Commenté : hamida le 2 Déc 2022
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 commentaire
hamida
hamida le 2 Déc 2022
Affy, please can you tell me how you solved this problem.

Connectez-vous pour commenter.

Réponses (2)

Image Analyst
Image Analyst le 30 Mar 2015
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?
  1 commentaire
AFFY
AFFY le 31 Mar 2015
Yup but i couldn't extract the image with the help of your code. I tried thresholding, filtering and finding 4 corners in the image to get it rotated but it din't work either.

Connectez-vous pour commenter.


Image Analyst
Image Analyst le 31 Mar 2015
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 commentaires
AFFY
AFFY le 31 Mar 2015
that isn't helping either.
Image Analyst
Image Analyst le 31 Mar 2015
Then try another method. I'm getting ready to fly to Arizona today and will not have much time to help anyone.

Connectez-vous pour commenter.

Catégories

En savoir plus sur Filter Banks dans Help Center et File Exchange

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by