Skew detection and correction

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ganesh on 5 Dec 2013
Commented: oza san on 28 Mar 2017
I hane a binary image that contains a headerline. I want to skew image so that header line will be in horozontal direction.
oza san
oza san on 28 Mar 2017
i have an image like below and i want to detect and correct the skew can you help me sir?

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Answers (2)

Image Analyst
Image Analyst on 5 Dec 2013
So find the line, then call imtransform to remove the shear (skew).
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Alex Taylor
Alex Taylor on 6 Dec 2013
Edited: Alex Taylor on 6 Dec 2013
Image Analyst's answer is on the money. However, I would use imwarp and affine2d instead of imtransform/maketform. The use of imtransform is no longer recommended.

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Alex Taylor
Alex Taylor on 6 Dec 2013
Edited: John Kelly on 27 Feb 2015
I do actually have one clarification from the tags. Do you really mean skew/shear, or do you actually mean rotation?
If you only need to rotate the header line out of view, it will be easier to just use the imrotate function (assuming you have the Image Processing Toolbox).

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