straighten a image
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hello people am working on a ocr of braille! i have finished the entire project! the one drawback of my project seems to be that, my code doesn't work on images which are slightly curved during scanning! the input to my code is a scanned braille script! so if the image is tilted, then my code gives me an error! so i wanna know if there's any algorithm or method by which i can straighten that image!! any help would be greatly appreciated. thank you
2 Comments
Geoff
on 24 May 2012
Sorry, first you say "curved", then you say "tilted". Which is it? Or is it both?
"Curved" implies you need to de-warp the image. "Tilted" implies you just need to rotate it. If it's the latter, do you have any reference lines in your image to indicate what true vertical or horizontal is?
Accepted Answer
Image Analyst
on 25 May 2012
Can you detect the dots? If so, you might be able to use radon() or RANSAC ( http://en.wikipedia.org/wiki/Ransac) or possibly hough() to find the angle, then use imrotate.
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More Answers (3)
goutam
on 25 May 2012
1 Comment
Image Analyst
on 25 May 2012
There are a few different ways to do it. Did you look up any of the ways I suggested?
goutam
on 25 May 2012
4 Comments
Image Analyst
on 26 May 2012
Well what can I say without seeing your code? All I can say is that you did something wrong.
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